النظام الآلي لتسجيل الضمان الصحي Online Health Insurance System kuwait الكويت

الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين 

النظام الآلي لتسجيل الضمان الصحي 
Online Health Insurance System kuwait الكويت 

النظام الآلي لتسجيل الضمان الصحي
Online Health Insurance System
شرح تفصيلي خطوة خطوة مع الروابط اللازمة
kuwait الكويت

 

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تسجيل الدخول Login

https://insonline.moh.gov.kw/Insurance/logaction

 

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خدمة تسديد الضمان الصحي متاحة من السبت 
إلى الخميس الساعة 7 صباحا حتى الساعة 10 مساءاً

Ministry Of Health Kuwait

Health Insurance Online Application

إنشاء حساب جديد Create a new account

https://insonline.moh.gov.kw/Insurance/gotoReg

 

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you need to verify OPT by using mobile sms

سيصلك رمز التحقق عبر الرسائل القصيرة

 

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password comes by mobile sms also

سيصلك كلمة السر عبر الرسائل القصيرة

 

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Notice
Users of the service must ensure that all information
provided for the purpose of obtaining Health Insurance
is correct.Ministry of Health is not responsible to reimburse
the paid amount if it is found that information provided is false

تنويه
يجب على مستخدمي الخدمة التأكد من صحة جميع المعلومات المقدمة 
لغرض الحصول على التأمين الصحي.لا تتحمل وزارة الصحة مسؤولية 
إسترجاع المبلغ المدفوع إذا تبين أن المعلومات المقدمة غير صحيح
ة

 

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تحتاج إلى طابعة ملونة لطباعة ورقتي التأمين بعد أن تقوم بالدفع كي نت
عدد اثنين ورقة 
you need a colored printer to print the insurance
tow papers after payment knet

رسوم الضمان الصحي في دولة الكويت للوافدين
=======
50 د.ك
رسوم القسط السنوي للضمان الصحي
لفئات الحاصلين على الإقامة التجارية
أو العاملين بالقطاع الحكومي أو القطاع الخاص
رسوم القسط السنوي للضمان الصحي للفئات الملتحقة بعائل
الابن أو الابنة فوق 18 سنة ، أو الأخ أو الأخت، أو الأم أو الأب
رسوم القسط السنوي للضمان الصحي لفئات الحاصلين على الإقامة الدراسية
=======
40 د.ك
رسوم القسط السنوي للفئات الملتحقة بعائل الزوجة
=======
30 د.ك
رسوم القسط السنوي للأبناء تحت 18 سنة
=======
5 د.ك
رسوم القسط السنوي لفئات الخدم
رسوم القسط السنوي للفئات الملتحقة بعائل
زوجة الكويتي ، أو الأرملة أو المطلقة لكويتي وهي مكفولة بأحد أولادها
أو أبناء الكويتيات ، أو الملتحقة بعائل كويتي أو خليجي ، أو أبناء الخليجية
أو الأرملة أو المطلقة التي تكفل نفسها، أو غير محددي الجنسية فئة البدون
=======

في أمان الله 

 

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Kuwait Society Of Engineers جمعية المهندسين الكويتية التسجيل شهادة إلى من يهمه الأمر الكويت

الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين 

Kuwait Society Of Engineers جمعية المهندسين الكويتية التسجيل 

خطوة خطوة شرح بالصور
step by step

Kuwait Society Of Engineers

جمعية المهندسين الكويتية

 

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http://kseonline.org/

١ – صورة البطاقه المدنية
1 – Copy of Civil ID
٢ – صورة إذن العمل
2 – Copy of Work Permit
٣ – صورة جواز السفر
3 – Copy of passport
٤ – صورة شهادة التخرج المصدقة
4 – Copy of graduation certificate with stamp
٥ – صورة من كشف الدرجات
5 – Copy of mark sheet (transcript)
٦ – أو صورة بطاقة عضوية نقابة المهندسين في
بلد مقدم الطلب أو شهادة عضوية من نقابة المهندسين
6 – Or copy of your membership of engineers syndicate in
your country or / copy of certificate of your membership

Go to the new site mentioned above
إذهب إلى الموقع الجديد المذكور أعلاه

choose language
إختر اللغة
ثم تسجيل الدخول
Then login

 

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create a new user
مستخدم جديد

 

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موعد المراجعة

 

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إختيار نوع المستند و حفظه واحد واحد في كل مرة
choose document type and save one by one

 

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و في النهاية إنهاء عملية التسجيل
then finish

Important : all documents need to be scanned

both sides in case there are any data on the back side

you can submit the same document as many times as you want

example : civil id 

 

 

جمعية المهندسين الكويتية

هي جمعية تضم عدد من المستخدمين إما أن يكونوا أفراد أو شركات و هناك نوعين من العضوية لدي الجمعية و هما

الخطوة الاولى

حساب أفراد

هذا الحساب خاص بالمستخدمين الذين يرغبون باعتماد شهادتهم الشخصية لدي الجمعية

حساب شركات

هذا الحساب خاص بالمستخدمين الذين يرغبون باعتماد شهادات المهندسين لدي الجمعية

الخطوة الثانية

بعد تسجيل بيانات المستخدم و تفعيل الحساب بناء على الرابط الذى يصل للمستخدم عبر البريد الالكترونى يستطيع التفاعل
مع النظام ومتابعة الخطوات المطلوبة لتقديم طلب تقييم شهادة (سواء كان فرد أو شركة) ،والتى تبدأ بالتسجيل لكل من :

بيانات المهندس الشخصية
بيانات الشهادة
بيانات الشركة
بيانات النقابة الدولية

تحميل المستندات المطلوبة و المتمثلة في :

صورة البطاقة المدنية
صورة إذن العمل
صورة جواز السفر
صورة شهادة التخرج المصدقة
صورة من كشف الدرجات
أو صورة بطاقة عضوية نقابة المهندسين في بلد مقيم الطلب أو شهادة عضوية من نقابة المهندسين

في أمان الله 

 

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RS-70 R453A safe and sufficient replacement for R22 

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الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين

RS-70 R453A safe and sufficient replacement for R22

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p style=”text-align: center;”>DESCRIPTION
Type HFC blend HCFC
Components:
R-134a 53.8%
R-125 20%
R-32 20%
R-227ea 5%
R-601A 0.6%
R-600 0.6%
replacement R22 no oil change and accepts top up
Temperature glide Approximately 4oC
Drop-in or long term Both
Lubricant MO/AB/POE
ODP Zero
Atmospheric lifetime 16 years
GWP 10 year ITH 1765
500 year ITH 545

R22 PHYSICAL PROPERTIES

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p style=”text-align: center;”>Molecular weight 86.5
Boiling point (1 atm) oC -40.8 0F -41.4
Temperature glide oC 0
Critical temperature oC 96.1 oF 204.8
Critical pressure bara 49.9 psia 724
Liquid density at 25oC kg/m3 1191
Density of saturated vapour at 25oC kg/m3 44.2
Heat capacity of liquid at 25oC kJ/kgoC 1.26
Ratio of gas heat capacities (cp/cv, k) 1.185
Vapour pressure at 25oC bara 10.4 psia 151
Latent heat of vaporisation at boiling point kJ/kg 234
Ozone Depletion Potential ODP 0.6
Flammability limit in air (1 atm) vol% None None
Inhalation exposure (8 hr day & 40 hr week) ppm 1000

RS-70 PHYSICAL PROPERTIES

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p style=”text-align: center;”>Molecular weight 88.8
Boiling point (1 atm) oC -42.2 0F -44.0
Temperature glide oC 4.2
Critical temperature oC 87.9 oF 190.3
Critical pressure bara 45.3 psia 656
Liquid density at 25oC kg/m3 1136
Density of saturated vapour at 25oC kg/m3 41.7
Heat capacity of liquid at 25oC kJ/kgoC 1.52
Ratio of gas heat capacities (cp/cv, k) 1.137
Vapour pressure at 25oC bara 11.2 psia 163
Latent heat of vaporisation at boiling point kJ/kg 243
Ozone Depletion Potential ODP 0
Flammability limit in air (1 atm) vol% None
Inhalation exposure (8 hr day & 40 hr week) ppm 1000

في أمان الله

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The Technical Company for General Trading & Contracting for Thermal and water Insulation

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الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين

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p style=”text-align: center;”>عناوين SUPPLIERS SERVICE NUMBERS
The Technical Company for General Trading & Contracting for Thermal and water Insulation
أرقام مراكز الخدمات للوكلاء

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http://www.technical.com.kw/index.html

Insulation Materials Polyurethane System founded in 1996

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p style=”text-align: center;”>General Trading of Waterproofing systems for Roofs, Kitchens, Bathrooms
Basements and Swimming Pools. Supplier of specialties materials

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p style=”text-align: center;”>P. O. Box 28755 Safat, 13148 Kuwait
Al-Rae, Street 33, Block 373
Tel: 24716686 / 24755617/8
Fax: 24755956
E-mail: tic@technical.com.kw

في أمان الله

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عناوين SUPPLIERS SERVICE NUMBERS Zain Ooredoo Viva Kuwait أرقام مراكز الخدمات للوكلاء


الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين

عناوين SUPPLIERS SERVICE NUMBERS Zain Ooredoo Viva Kuwait
أرقام مراكز الخدمات للوكلاء

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زين أوريدو فيفا الكويت

أرقام الخدمة و روابط الإنترنت لمعرفة رصيد خطك
و كافة المعلومات الضرورية
مثل مدة العقد و تاريخ الإنتهاء
إضافة و إزالة باقات الإنترنت
شراء باقات و رصيد إنترنت
رقم خط النقال للإنترنت

4G Connectivity 4G+ Connectivity

mobile telecommunications service providers in Kuwait

Balance Inquiry Customer may use USSD command

Get information on your prepaid balance by dialing USSD command

Zain Kuwait

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Get information on your internet balance

http://connect.kw.zain.com/

service number 107

Zain Kuwait Dial the USSD code by dialing *107#

Viva Kuwait

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Get information on your internet balance

http://viva.com.kw/mbb

service number 102

Viva Kuwait Dial the USSD code by dialing *555#

Ooredoo Kuwait

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Get information on your internet balance

http://ooredoo.com.kw/mynet

service number 121

Ooredoo Kuwait Dial the USSD code by dialing *555#

في أمان الله

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HFC blend Refrigerant R424A known as RS-44b R22 Replacement 


الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين

HFC blend Refrigeran R424A known as RS-44b R22 Replacement

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HFC blend
HFC blend Blend of
HFCs R125 + R134a + HCs R600, R600a + R601a

HFC 134a 47%
HFC 125 50.5%
iso-pentane 0.6%
n-butane 1%
Isobutane 0.9%

Chemical names

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tetrafluoroethane
pentafluoroethane
iso-pentane
n-butane

Isobutane

Lower GWP than most of R22 replacements
ozone depletion potential safe
Non toxic and non flammable safe

R424A RS-44 PHYSICAL PROPERTIES

RS-44 vs R22

Molecular weight 108.1 86.5
Boiling point (1 atm) C -38.7 -40.8
F -37.6 -41.4

Critical temperature C 88.8 96.1
F 191.8 204.8

Critical pressure bar 40.4 49.9
psi 586 724

Liquid density at 25 C kg/m3 1169 1191

Density of saturated vapour
at 25 C kg/m3 43.6 44.2

Specific heat of liquid
at 25oC kJ/kg C 1.43 1.26

Specific heat of vapour
at 1 atm & 25 C kJ/kg C — —

Vapour pressure
at 25 C bar 9.67 10.4
psi 140.2 151

Latent heat of vaporisation
at boiling point kJ/kg 196 234

Ozone Depletion Potential ODP 0 .055

Flammability limit
in air (1 atm) vol% None None

Inhalation exposure
8 hr day & 40 hr week ppm 1000 1000

في أمان الله

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choosing Weatherproof Enclosure and outdoor electrical enclosure products Selection Tips DETAILED TECHNICAL SPECIFICATION

الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين 

choosing Weatherproof Enclosure and outdoor electrical enclosure products
Selection Tips DETAILED TECHNICAL SPECIFICATION

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Weatherproof enclosure must be factory fabricated from an
approved switch board manufacturer and must be dust and
water protected complying with I.E.C. No. 144 Degree of Protection IP 54

Weatherproof enclosure must be provided with hinged doors
with suitable latching arrangement. Weatherproof enclosure
with screwed and bolted door not acceptable 
The hinges and latches must be of non-corrosion 
materials and the best in their kind

The weatherproof enclosure must be of robust construction
to withstand rough handling as well as the climatic conditions

Weatherproof enclosure must be fabricated from galvanized
steel sheet not less than 2 mm thickness 

Weatherproof enclosure must be provided with suitable
internal and external earthing terminals 

Entry and exit conduits or cables to the weatherproof enclosure must 
always be from the button with proper sealing arrangement 

Enclosure must be of ample size to house the switchgear without obstructions 

The surface of weatherproof enclosure must be 
treated after fabrication as the following 

a) Sand blasting to roughen for the surface
b) One zinc chromate priming paint 
c) The coats of approved durable oil weather resisting paint 

The relevant dimensioned and detailed drawing of the weatherproof 
enclosure must be submitted along with the materials 

في أمان الله 

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choosing Refrigerant Piping Selection Tips DETAILED TECHNICAL SPECIFICATION


الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين 

choosing Refrigerant Piping Selection Tips 
DETAILED TECHNICAL SPECIFICATION

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a) Refrigerant piping assembled must consist of copper tubing 
to ASTM specifications B.88, Type “K” hard drawn and soldered joints
Fittings must be of wrought copper or fine cast brass. Where required
for gauges, etc., tubing not larger than 10mm. Diameter may be of 
type “K” soft (annealed) with flared tube or double ferrule compression
fittings suitable for high pressure. Flux and solder as recommended by 
the manufacturers of tubing and fittings only must be used during installation

b) Refrigerant piping must be installed so as to ensure continuous and 
automatic return of oil to the compressor. Gauges and meters etc
supported directly on piping must be properly leveled

c) Refrigerant stop valves must be back seating, key operated
seal cap type. Valves, which are to be in constant use, must
have hand wheels and must be packless type
Valves connected in copper tubing must have solder type ends or 
flanged end and soldered flanged adapters

d) Accessories for field-assembled system like oil separators 
liquid receivers, heat exchangers, expansion valves, etc 
must be installed as per manufacturer’s recommendations and specifications

e) Replaceable core type filter drier with by pass valves and
liquid sight glass must be provided

f) Pump down system must be provided for each unit

Pressure Tests

After installation is completed, but before piping is furred in or 
before insulation is applied, all piping and equipment must be 
tested for leaks using Nitrogen or an approved gas

Vacuum Test

Before charging the system with the refrigerant, it must be
dehydrated thoroughly, using a high efficiency vacuum pump
and vacuum indicator. Dehydrating operation should continue
until a reading of 35 FWB at a pressure of 5.2mm HG absolute is reached

Return Air Plenum

Return air plenum must be an integral part of the unit, factory assembled
Plenum must be suitable for accommodating 50 mm. thick metallic cleanable
filters with a face velocity not exceeding 1.8 m/sec
However, equal and approved field installed filter plenums are also acceptable

Control Wiring & Protection Devices 

The thermostat control voltage must be 24 volts
The A/C units being offered must feature the following minimum
requirements of safety interlocking and protective devices 

Safety electrical and mechanical interlocking of evaporator fan motor 
with compressor / heater operation and interlocking through an airflow switch
wherever duct heaters are provided

Where multiple compressors are incorporated in the units their 
operation must be in sequence in accordance with return air temperature

Manually reset and adjustable oil pressure differential cutout
of 90-sec/120 sec. trip time rating for compressors of 25 HP and above

Manually reset and adjustable high pressure and adjustable
automatic low-pressure cutout for compressor protection 

Time guard circuit for preventing compressor rapid recycling
preferably of adjustable range from 5 minutes to 15 minutes

Time delay relay for sequence starting of multiple
compressors system of minimum 15 sec. delay rating

Separate single phasing preventor suitable for three phase 
415 volts, 50 Hz. power supply to prevent the whole unit from
single phasing phase shift and under voltage with a response
time rating of maximum 2.0 sec

Inherent thermal protection for compressor motor winding 
three phase evaporator fan and condenser fan, motor windings

Inherent thermal protection or manually reset thermal or magnetic overloads 
for single-phase condenser and evaporator fan motors

External thermal overload with manual reset or MCCB of
suitable rating for all three phase motors in addition to (h) above

The unit must be controlled by a duct thermostat housed in a
suitable perforated transparent casing with a lock. Control
voltage of the circuit to which thermostat is connected must be 24 V

The control panel must be IP 54 at least 

Return Air and Fresh Air Filters

1) Return air filters must be permanent and washable type made of aluminium 
or G.I. sheet designed for heavy duty and must be sized for maximum 
air velocity of 350 ft. per minute with initial pressure drop of not more 
than 0.25 inch W.G. at the rated air flow. Filter media must consist of 
cripped G.I. or aluminium arranged to give maximum area for airflow
2) Return air filters must be enclosed in a separate filter frame
integral unit.
3) Fresh air filters must be of the same specification as return
air filters.
4) Thickness of return air filters must be 2″ and that of fresh air filters must be of 4″

Drain-pipe sizes must be minimum 19-mm. diameter and
the material must be GI. The drainpipe must be
connected to the drain point of the unit with transparent
plastic flexible hose and jubilee clips

Thermostat must be provided for each unit

All mountings, brackets, bolts, fixtures, etc. for installing
the condensing unit and fan coil unit must be provided

All mini-split A/C units must be provided with proper earthing 

في أمان الله 

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choosing HVAC PIPE WORKS AND FITTINGS Selection Tips DETAILED TECHNICAL SPECIFICATION

الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين 

choosing HVAC PIPE WORKS AND FITTINGS Selection Tips 
DETAILED TECHNICAL SPECIFICATION

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General

a) They must be installed with a view to an easy and even 
flow of fluid to and from all apparatuses without air pockets
It should be installed for quick, sure and positive drainage 
and provisions for quick and noiseless air escapement

b) All parts of the system must be capable of being vented
air vents must be provided at the highest points of all risers
vents must be piped at their points of connection to 
the piping system and to a visible drain

c) Piping must be run, in general, forming right angles with 
or parallel with walls and neatly spaced, must be installed 
so that there is clearance of at least 25 cm, between
finished coverings and the adjoining

d) Piping must be hung in ceiling void as close as possible 
to bottom of slabs, beams, etc., maintaining required 
and co-ordinated head room at all times

e) Dielectric connections must be provided for joining two 
different pipe work materials or pipes and equipment
in order to isolate cathodically the pipeline or the equipment
These connections must be rated to withstand the 
maximum medium temperature and pressure

f) All necessary line valves for the satisfactory isolation 
of components and sections of the system are to be supplied and fitted

g) Bends should be used in performance to elbows wherever possible

h) Equipment and apparatus must be installed as to be totally 
readily accessible for operation and maintenance

i) Wherever pipe work passes through walls and floors, mild steel
pipe sleeves must be provided sufficient to ensure free movements
In addition, chromium plated floor plates are to be fitted in the 
office blocks or where directed by the Engineer

j) Pipes connected to vibrating machinery must be isolated 
from the supporting structure by vibration eliminators designed 
for supports by hanger rods. Pipes must be isolated from the
vibrating machinery by use flexible metal pipeline connectors 
of metal to suit the fluids conveyed and the surrounding conditions

In all lines carrying liquids drain valves must be installed 
at all low points in the system at the end of every primary or secondary main
at intervals and not more than 75 meters in all horizontal pipe lines
and all equipment positions. The drain connections must be provided 
with a drain line leading down with drain cock to the nearest drain pit

The size of the drain lines and drain cocks must be

1- For pipelines below 4″ dia. the drain line and drain cock must be 1″
2- For pipelines 4″ dia. and above the drain pipe and drain cock must be 1.5″
3- For outside drainage points on 4″ & above pipe works drains must be 2″
4- Dirt pockets must be installed on all pipelines

the dirt pockets must be located in the pipelines at 

1- All low points in the system
2- Ahead of any rise in the piping
3- At every 120m (max) of level piping with a relative 
constant demand during design operation
4- At the end of any primary or secondary main
5- Every 60 M (max.) of level, piping with considerable 
on-off demand during design operation
6- Ahead of all pressure reducing and control valves
unless the branch feeding the valve is taken off the 
top the main and is less than 1.5 m in length

All piping, fittings and flanges must be cleaned and thoroughly 
degrease before assembly. The entire system must present a 
neat appearance for both workmanship and grouping

Welding

Welding must be done by gas or electric arc process using 
equipment and plant laid down by BS 1821 and BS 2633

The method of welding and testing must be in accordance with
the practice recommended by the BSI and AWS

All operatives must be thoroughly experienced and have 
certificate of competency. If necessary, these certificates must 
be produced for scrutiny by the Engineer and welders must be 
required to take such test as required by A.P.I.

Standard 1104 or as required by the Engineer. Lloyd’s Surveyor 
or equivalent. If necessary if there is bad workmanship in the 
opinion of the Engineer, must be instructed to:

a. Forthwith remove the operative responsible from the site
b. Replace all welding works carried out by the Operatives.

When welding is carried out, or a blowlamp used, adequate protection 
must be given to prevent damage to any part of the building 

The outside diameter and the wall thickness of butt-weld fittings 
and welding neck flanges must be the same as the outside diameter 
and wall thickness of the pipes to which they must be welded

Heat generated by welding must not be allowed to accumulate at any bearing
bearing retainer, machined surface, or dis-similar metal components
Precautions must be taken to dissipate the heat as it is generated

The joints must be tested to maximum tension required at the ambient 
temperature and pressure. The joints must also be subject to a compression
test up to a maximum deflection shown on the Data sheet, at service pressure 
and ambient temperature. At the completion of those tests, which are to be 
repeated in accordance with the required number of cycles, the joints are 
to be re-subject to a hydrostatic pressure of 1.5 times the working pressure

After completion of the above tests, the expansion joints must be rejected
if there are any leaks or sign of breakage of any point or part of the bellows

15% of all welds must be X-rayed. This identification number of the joints
must be stamped or painted on a metal sheet and fixed to the expansion joint by wire
Both wire and metal sheets are to be corrosion proof

Jointing

Up to and including 50 mm bare pipe may be either welded or screwed 
for all cold services and hot services up to a working temperature of 85 Deg. C
The pipe must be welded with flanged joints, above the size and where buried 
under ground welding must be permitted with flanged joints

The use of flanges must be limited to the flanged connections to the valves
and equipment and the following

– Location of different access, and high and low points
– Inspection holes
– On straight runs of pipe where frequent dis-assembly operations
for cleaning and maintenance may be necessary. The interval between
flanges should not normally exceed 15 m
– Positions where equipment dis-assembly requires pipe removal
All bolts must be of stainless steel as per BS requirements

Supports and Hangers

All pipe supports and hangers required for installation of the pipes 
must be provided by the contractor. Vertical risers to be provided
with suitable iron clamps. Brackets under the supports of pipes must 
be provided with sheet metal cradles to spread the load. Pipe supports 
pattern to be approved by the Engineer and must be Roller type 

Protective covering shield must be provided between all pipe supports
hangers and the insulated piping. Shield must be made of a stout gauge
galvanized mild steel of sufficient length to prevent depression of pipe covering

Additional supports must be provided and installed within 300 mm 
where pipes change direction and adjacent to flanged valves
strainers, equipment connections and heavy fittings

All vertical pipe run must be supported and laterally braced
at least once, at each building level

Unless otherwise indicated on the drawings, vertical pipes must be supported
with riser clamps, installed below hubs, couplings or lugs welded to the pipe

Hanger and supports must be prepared and painted

Insulated copper pipe must be supported by copper supports or copper plated hangers

Pipe Sleeves

All pipes passing through walls, partitions and ceiling must be provided 
with pipe sleeves. Sleeve size must allow for the free movement of pipes
Sleeves passing through the finished service or exposed to view
must be flush with the surface of the partition through which they pass
and must be provided with suitable end covers of approved pattern and finish

Expansion and Contraction of Pipes

must be dealt with by compensators. In all locations where expansion 
is not taken by piping offsets, they must have stainless steel or chromium 
melypelenum bellows and/or loop. Expansion more than 3/4″, expansion

bellows/loop must be used. They must have 3 rigid plot straps type
guides with adequate bearing surface fixed at 4 times as the 
diameters on each end and suitable to prevent any axial movement
Anchors must be provided between expansion units
These must be of sufficient strength to hold the mains tight against 
movement and withstand the thrust due to pressure and expansion 
but must not crush or injure pipe walls. consult the manufacturer for 
the precise position of the compensator and anchors and the amount 
of expansion that is to be taken by the compensators. make the calculations
of expansion bellows, guides and anchors and obtain approval of the 
Engineer prior to commencement of the works

Flanges

must be provided on both sides of each piece of equipment in the plant
and where required, having diameter 2.5″ and above must be according
to BS 10 or BS 4504 or equal approved

Unions

must be provided on both sides of each piece of equipment
in the plant having diameter less than 2.5″

Dielectric Joints

must be provided for jointing two different pipe work materials or pipe work
and equipment in order to isolate cathodically the pipeline or equipment
This connections must be rated to withstand the maximum, medium
temperature and pressure

Vibration Eliminators

Pipes connected to vibrating machinery must be isolated from the supporting
structure by vibration eliminators design for support by hanger rods
Pipes must be isolated from the vibrating machinery by use of flexible 
metal pipeline connectors of metal or rubber flexible joint, to suit the fluids
conveyed and the surrounding conditions

Valves

All valves must be factory fabricated and of types as shown on the drawings

Valves must be marked with name of manufacturer, trademark, nominal size 
and the class number, all casts in the valve body

Valves, where possible, must be of one manufacturer. Valves must be designed
for saturated steam working pressure of 861 Kpa (125 psi) and cold water 
non-shock working pressure of 1378 Kpa (200 psi) and must be manufactured 
and factory tested in accordance with the latest relevant British Standard or an equivalent
Test Certificate must be submitted for all valves
Seating surfaces of valves must be machined and finished to 
ensure tightness against leakage for the service specified and must seat freely
Hand wheels of valves must be of suitable diameter to allow 
tight closure by hand with reasonable force without additional leverage 
and without damage to stem, seat or disc
Valves located 2.4 m. or more above operating floor or platforms 
in plant rooms must be provided with a chain operated hand wheel
Flanged valves must have flanges confirming to BS 4504-NP 16/11 or ANSI 125 or equivalent
Cast iron body gate, globe and butterfly valves must be provided with position indicator
All cast iron valves must be fitted with Cast Iron indexed hand wheel clearly 
marked “Open” and “Close” with an arrow to indicate the direction of rotation

Gate Valves

Gate Valves must be used for isolating purposes, as shown on the drawings
must not be used for throttling purposes, such as regulating, balancing or controlling
must be of double-faced solid wedge disc type giving straight-line flow
Gate valves of sizes 2” mm and smaller must be of all bronze construction 
type with inside screw non-rising spindle, screwed bonnet, and screwed 
ends to ASTM B-61, B-62 or of gunmetal to BS 1400/LG2
Gate valves of size 2½” and larger must be of flanged bonnet and 
flanged ends, outside screw rising spindle type. Body, wedge and cover 
must be of cast iron, wedge facing rings and stem nut of gunmetal and
spindle of aluminium bronze. Steam seal packing must 
be of high quality suitable for Kuwait climate.
Gate valves of sizes 8” and larger must be equipped with bevel gear unit

Globe Valves

Globe valves must be used for throttling purposes to control 
the flow rate from full flow to complete shut-off
Globe valves of size 2” and smaller must be of all bronze construction 
with inside screw rising spindle, screwed bonnet and screwed ends
Globe valves of size 2½” and larger must have cast iron body, with outside
screw aluminium bronze rising spindle, renewable gunmetal or bronze disc
with gunmetal or bronze seat ring, flanged bonnet and flanged ends
Globe valve disc must be of the beveled or parabolic shape to allow throttling

Check Valves

Check valves must be silent, spring actuated lift type used to prevent 
automatically reversing of flow at pump outlets, in vertical lines and as 
indicated in the drawings or as required elsewhere
Check valves of sizes 2” and smaller must be of bronze construction, screwed ends
Check valves of sizes 2½” and larger must be of cast iron or 
ductile iron body, wafer type, stainless steel or bronze disc
stainless steel spring and renewable seats

Butterfly Valves

Butterfly valves must be used for shut-off or throttling purposes as shown on drawings
Butterfly valves must be of rubber / EPDM lined tight shut-off type
having ductile iron / ductile iron body, aluminium bronze disc
high grade stainless steel shaft, bronze bearings, monel metal
taper pins, buna-n seat liner vulcanized to the body
The butterfly valves must be wafer type or flanged type
Butterfly valves of 6” and smaller must have lever operator. Valves of 8” and larger must have manual gear operator.
All butterfly valves must be supplied with locking device and position indicator

Commissioning set must be provided on the return pipe of each 
water-cooling or heating coil and at other locations as shown on 
the drawings to facilitate balancing procedure. Commissioning set 
must consist of a double regulating valve for flow regulation and isolation 
and metering orifice station for measuring the pressure drop

The metering station must have an integral square-edged orifice plate 
fitted with a pair of pressure test plugs, which can be connected to a manometer
to measure the head loss. Bronze metering station must have cast-in flow 
direction marking, and threaded ends. The cast iron metering station must 
be supplied complete with two correctly sized gaskets and one set of flange bolting

The double regulating valve must be of the Y-pattern Oblique
globe type having a parabolic disc for allowing regular variation of the valve opening
The variation of the opening is step controlled by a graduated adjustable 
sleeve fitted with the valve to control the lift of the disc 
Each opening position is indicated by a marked number on the sleeve
At any pre-set position, the valve opening can still be regulated from
fully closed to a maximum opening at the pre-set position
The regulating sleeve is locked in the set position to prevent undesirable
interference with the setting but remaining capable of being closed 
For size 2” and smaller Commissioning Set must be of all bronze or 
gunmetal construction screwed ends and rising stem double regulating 
valve fitted with numeric indicator 

For sizes 2½” and larger, Commissioning Set materials must be as follows 

1) Metering Orifice Station
Cast iron body, stainless steel orifice plate, gunmetal retaining bush and brass test plugs 
2) Double Regulating Valve
Cast iron body, Stainless steel or bronze rising stem, gunmetal disc
gunmetal rings, anodized aluminium indicator plate and flanged ends 
Note:
No need for a separate metering Station if the DRV is provided with flow measuring provision 
DRV with pressure tapping for flow measurement will be considered 
for approval instead of independent Metering Orifice Station 
Direct reading gauge with necessary hoses and other accessories must be supplied 
in a portable sturdy metallic or plastic casing for each size of valve used 

Strainers

Strainers must be provided at the Suction side of each water circulating pump 
and at other locations as shown on drawings 
Strainers must be of Class 150 saturated steam-working pressure 
Strainers must be Y-type 
Strainers must be of same size as the connecting pipe 
Strainers for 2” pipe size and smaller must be bronze body
with stainless steel screen and screwed ends 
Strainers for 2½” pipe and larger must be cast iron 
body with stainless steel screen and flanged ends 
Screen perforation must be as follows 

Pipe size 112 B Perforation size (mm) Number of perforations per Sq. Cm. 0 B Up to 2”
2½” and larger 0.8 1.6 64 23

Automatic Air Vents

Automatic Air Vents must be provided at all high points of water piping system
irrespective of whether indicated on drawings or not to permit venting 
any air collection at high points which tends to obstruct flow 

Automatic air vents must be of the float type, and construction must be as follows 
– Body and guide cross of bronze.
– Valve seat, guide bush, upper and lower guide connecting rod
valve and guide cone of brass or stainless steel 
– Float ball of stainless steel.
– All automatic air vents must be installed with a suitable size shut-off valve 

في أمان الله 

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choosing Mini-Split A/C Units Selection Tips DETAILED TECHNICAL SPECIFICATION


الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين 

choosing Mini-Split A/C Units Selection Tips 
DETAILED TECHNICAL SPECIFICATION

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Mini Split Air Conditioning Units must consist of an air cooled condensing unit 
and a matching fan coil unit, factory assembled, pre-wired
pre-charged and factory tested, capable of giving the required 
capacity at hot conditions, using (R407 or R410) – refrigerant
The unit should be internationally reputed ,have undisputed record of approval

Condensing unit

1) Casing
Casing must be constructed of heavy gauge M.S sheet
metal and must be firm and rigid 
Casing must have an approved anti-corrosive and heat
resistant paint finish 
2) Coil
Condenser coil must be made of seamless copper tube with
copper / aluminium straight fins, mechanically expanded over the tubes 
3) Compressor
Compressors must be of hermetic reciprocating or rotary
type of appropriate capacity and must be suitable for operation on
415 V, three phase, 50 Hz
240 Volts, single phase, 50 Hz
110 Volts, single phase, 60 Hz .. USA
supply with a permissible voltage
variation of +/-6%. Compressors must have inherent
thermal protection or external thermal overloads 
4) Condenser Fans
Condenser Fans must be multi-blade type directly mounted
on drip proof motor with Class “A” insulation and must be
suitable for operation on 415 volts, 3 phase, 50 Hz. or 240
volts, single phase, 50 Hz or 110 Volts, single phase, 60 Hz .. USA
supply with permissible voltage variation of +/-6%
Condenser fan motors must be provided
with inherent thermal protection 

Evaporator Unit 

Evaporator Unit must be wall-mounted / ceiling suspended type 

1) Casing
Casing must be of heavy gauge M.S. Sheet, with
decorative type stove enamel finish, and must be
provided with adjustable type air deflectors.
2) Evaporator Coil
Evaporator coil must be made of seamless copper tubes
with copper / aluminium fins mechanically bonded to the
tubes. Spiral fins are not acceptable. 
3) Fan
Fan must be multi-blade centrifugal, two or three speed
impeller type directly mounted on motor shaft and must
be easily accessible for maintenance. Fan motor must be
open type with Class “A” insulation, provided with
inherent thermal protection and suitable for 240 V, 50 Hz.
single phase or 110 Volts, single phase, 60 Hz .. USA power supply 
4) Air Filters:
Air Filters must be of permanent cleanable and washable type and 
must be easily accessible; thickness must be minimum 12.5 mm 

Other requirements

pre-charged and pre-insulated refrigerant tubing as supplied 
by manufacturer of the A/C Unit must be used
The insulation must be wrapped with 8-oz. canvas 
and painted with two coats of weatherproof paint 

في أمان الله 

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DUCT WORKS Selection Tips DETAILED TECHNICAL SPECIFICATION

الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين 

DUCT WORKS Selection Tips DETAILED TECHNICAL SPECIFICATION

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A. All ducting must be made of galvanized steel sheet to ASTM A525
lock-forming quality, having zinc coating of 275gm/M² for both sides
in accordance with ASTM A90 and of tensile strength 28/33 tons per square inch

B. All ducting must be made as indicated in the installation drawings and 
successful tenderer must check the installation and building before 
hand and ensure that the existing structures, etc., must not come in 
the way of ducting at time of installation
Dimensions of ducting can be altered by the contractor with the prior 
approval of concerned Engineer without altering permissible airflow rates

C. All ducting must be suitably stiffened to avoid vibration, sagging and 
running effects due to airflow. All ducting must be made airtight

D. Gauges of G.I sheeting, type of joints, bracing, etc., used for the 
manufacture ducting must be as shown below

E. The throat radius of bend must not exceed half the width of associated 
side of the duct and where it is not possible to comply with this duct turning 
vane must be used along with the right angle bends
The duct turning vanes must be spaced in such a way that the speed
ratio of each of the individual elbows must be around 6:1 

Maximum Side inches US Standard Gauge 
Transverse Joints and Bracing 154BUp to 12″ 24 
¾” pocket or slip joint at 8 ft. centres 13 – 18” 24 
1” pocket joint at 4 Ft. centers with cross breaking 19 – 30” 22 
1” pocket joint at 4 Ft. centers with cross breaking 31 – 42” 22
1½” pocket joint at 4 Ft. centers with cross breaking and ½ x ½ x 1/8 
angle with girth at 8 ft. centres bolted to the pocket joint 43 – 54” 20
1½” pocket joint at 4 Ft. centers with cross breaking and 1½ x 1½ x 3/16 
angle with girth at 8 ft. centres bolted to the pocket joints 55 – 72” 20
1½” pocket joint at 4 Ft. centers with cross breaking and 1½ x 1½ x 3/16 
angle with girth at 4 ft. centres bolted to the pocket joints 73 to Up 18
2½” x 1½” x 3/16 angles at 4 Ft. centers bolted to the duct with 3/8 
bolts at 1½ centers and fastened together with 3/8” bolts at 2 centres
with rubber gasket between the 2 angles and cross breaking 

Joints 

50 mm Slip Joint or Draw Band is acceptable through 1500 mm size 
Slip or Draw Band Joint Flanged Joint 

All tees, Bends and Elbows must be constructed with radius 
of not less than 1½ times diameter of duct on centerline
Where not possible and where rectangular elbows are used
aerofoil-turning vanes must be provided 
Transformation of duct sizes must be gradual, not exceeding 
15 degrees divergence and 30 degrees convergence 
Round duct fittings must be of welded type construction
For ducts of diameter up to and including 300-mm. diameter
one-piece smooth 90 deg. elbows must be used. Over 300-mm dia
they must be 5 piece welded

Turning Vanes

must be fabricated in accordance with SMACNA Standards 
Turning vanes must be as follows 
Factory or site-fabricated using factory-fabricated vane spacing rails 
Turning vanes must be provided in all square elbows, take-off or 
extension collars to supply outlets and tap-in branch take-off connections 
Turning vanes must be reinforced by rods or of sectional construction 
Turning vane arrangements and thickness must be as shown 
153 B SINGLE 152 B VANE 151 B SCHEDULE Type Space between Vanes
Radius Gauge Small Large
1½” 3” 2” 4½” 24 22

Volume Control Damper

Volume control dampers must be provided in ductwork to regulate and 
balance air systems, since dampers on the air inlet and outlet must be 
used only for fine secondary regulating or balancing
The damper must be fabricated in accordance with 
SMACNA Duct Construction Standards 

Single blade dampers must be used for damper widths up to 300 mm
provided that there is sufficient length of straight duct after the 
damper to ensure equal flow before the next take-off or outlet
Where the damper width is over 300 mm. multi -blade dampers must be used
Multi blade dampers styles must be generally parallel blade for two-position
operation and opposed blades for modulating position
The blades must be constructed of galvanized sheet, suitably 
stiffened by forming or other method, and assembled in prime coated 
or galvanized channel frame with suitable hardware
The bearings must be of bronze or oil impregnated nylon

Looking and indicating quadrant regulator must be provided for each damper
The indicating quadrant must be clearly marked to indicate 
close, ¼, ½ , ¾ and open positions
On insulated ducts, quadrant regulators must be mounted 
on stand off mounting brackets or bases

For motor operated damper, the motor-operator must be electric type 

Fire Dampers

must be fabricated in accordance with NFPA 90A 
and UL 555 or equivalent and must be 
1• To be provided in ducts and openings in shafts, floor
firewalls, fire partitions and the rated ceilings

2• In horizontal ducts, fire dampers may be single or of a multi 
blade type. In vertical ducts only single blade type must be used

3• Galvanized sheet metal housing to be provided with angle flanges on both sides

4• The damper must be of 1.6 mm thick sheet steel or steel/mineral 
fiber/steel sandwich of equivalent fire resistance, thermally released

5• Fire dampers must be equipped with fuse plug, positioning levers
fittings and position indicator accessible from outside

Grilles and Registers 

They must be furnished with sponge rubber gaskets or foam
tape behind the frame to eliminate air leakage and with nylon
bushings or PVC at the blades connection to the frame to eliminate
corrosion and vibration. Free cross-sectional area must be at least 65 percent

1- Supply air registers and grilles must have individually adjustable
horizontal front blades and vertical rear blades

2- Supply air register must be equipped with key 
operated, opposed blade volume control damper

3- Return and exhaust air registers and grilles must have 
fixed single deflection blades set at an angle of 35 degrees

4- Return and exhaust air registers must be equipped with 
key operated, opposed blade volume control damper

5- All opposed blade volume control dampers must be polyester 
powder coated ovens taken with black colour finish

Jet Diffusers

must have manual discharge pattern adjustment from the 
front or back of diffuser, the outer flange of the jet diffuser 
to be made of aluminium, the inner core and rings to be made 
of mild steel construction, to be coloured by 
electrostatic polyester powder coating finish

Access Doors

Airtight access doors with rubber linings must be installed in all ducts
at fans, filters, heaters, fire dampers and volume dampers for inspection
cleaning and maintenance purposes

The opening in the ductwork must be properly stiffened at the edges
with frames riveted or welded to the duct
The access door must be 
All Access Doors mounted on insulated ducts must be 
of sandwich type, having the same insulation thickness 
as that of the duct, with Cam Lock handles

Maximum Size(mm) No. of Hinges No. of Handles Door Gauge Back Frame
12” x 12” 2 1 26 26 24 16” x 20” 2 2 24 26 22 24” x 24” 3 2 22 26 22

Flexible Connections

Flexible connections must be fitted on all suction and discharge 
connections of fans and air conditioning units, for preventing 
transmission of vibration through the ducts to occupied spaces

Flexible connections must be made from flame proof, factory 
fabricated from chemically impregnated canvas
Connections must fit closely and be secured in an airtight 
fashion to duct work, fans and apparatus by means of angle
iron or flat iron frames. The unclamped section of the flexible 
connection between the apparatus and the ductwork must be
not less than 150 mm. in length. Flexible connections must not be painted

Supports and Hangers

Installation of supports and hangers must be 

Supports and hangers must be attached only to structural 
framing members and concrete slabs. They must not be anchored 
to metal decking unless a means is provided and approved for 
preventing the anchor from puncturing the metal decking

Supports must generally be made from galvanized steel sections
and where heavy items of equipment occur within ductwork 
additional support must be provided as necessary

Duct work hung from inserts or from clip angles must 
be secured with expansion bolts in shear.

Supports for horizontal ducts must be

RECTANGULAR DUCT Length of Longer Side (mm) Drop Rod Diameter (mm)
Bearing Member (mm) 155BMaximum Spacing ( inch) 156 B up to 12” 8
20 x 3 Flat 120” 157B Over 12” up to 24” 8 25 x 25 x 3 angle 120”
Over 24” up to 40” 10 40 x 40 x 4 angle 100” Over 45” up to 64” 10
50 x 50 x 5 angle 100” Over 64” 15 75 x 75 x 6 angle 100”

Design of supports for vertical ducts will be dictated by site 
conditions and spacing may be greater than for horizontal ducts

Supports for vertical ducts must be angles and 
channels made of galvanized or painted black steel

Vertical duct must be fastened with a minimum 
of 2 supports at each floor

في أمان الله 

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choosing D.X. UNITS Selection Tips DETAILED TECHNICAL SPECIFICATION

الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين 

choosing D.X. UNITS Selection Tips 
DETAILED TECHNICAL SPECIFICATION

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GENERAL

All units must be rated in accordance with the ARI Standard and must be 
designed to conform to ASHRAE 15 latest revision and in accordance with UL 1995 

All units must be manufactured in a facility registered to ISO –9001 

All insulation and adhesive must meet NFPA 90A
requirements for flame spread and smoke generation

All units located outdoors near sea side or subjected to a
highly polluted and corrosive atmosphere (see duty) must be
coated with a special coat suitable for the following 
1) Highly concentrated acidic and alkaline atmosphere
2) Solvent resistance
3) Moisture
4) Ultra violet rays
5) Abrasion resistance
6) Salt spray tests according to ASTM B117.85 2000 hours 
and must be repairable in the field 

Return Air Plenum

Return air plenum must be an integral part of the unit, factory assembled
Plenum must be suitable for accommodating 50 mm. thick metallic cleanable
filters with a face velocity not exceeding 1.8 m/sec
However, equal and approved field installed filter plenums are also acceptable

Return Air and Fresh Air Filters

1) Return air filters must be permanent and washable type made of aluminium 
or G.I. sheet designed for heavy duty and must be sized for maximum 
air velocity of 350 ft. per minute with initial pressure drop of not more 
than 0.25 inch W.G. at the rated air flow. Filter media must consist of 
cripped G.I. or aluminium arranged to give maximum area for airflow
2) Return air filters must be enclosed in a separate filter frame
integral unit.
3) Fresh air filters must be of the same specification as return
air filters.
4) Thickness of return air filters must be 2″ and that of fresh air filters must be of 4″

Split System Direct Expansion Units

The units must be of internationally reputed have undisputed
record of performance.and must be approved 

The unit must consist of a remote air-cooled condensing unit and a matching air-handling unit 
Condensing units and air handling units must be of the same make 

The condensing unit must be of the air-cooled type, suitable for outdoor installation
constructed of heavy gauge, galvanized sheet with baked enamel finish
special coat to be applied. The unit must be complete with its own compressors
air-cooled condenser, motors, fans, starters, relays and 
other standard accessories and controls 

Compressor 

Compressor must be of the reciprocating/scroll type direct coupled
to an electric motor and complete with vibration isolators and crank case oil heater.
Compressors 15 HP and below, can be of hermetic sealed 
type preferably with oil level sight glass 
Compressors above 15 HP must be of Semi-hermetic semi-sealed multi cylinder
type with service valves and oil level sight glass
All compressors above 15 HP must have suitable capacity control arrangement 
For multi-compressor units, each compressor must have its independent refrigerant circuit 

Condenser 

Condenser coil must be constructed of seamless copper tubes with copper or aluminium
plate fins mechanically bonded to the tubes 
Spiral or round fins are not acceptable. Maximum number of fins not 
exceeds 14 per 25 mm. Condenser coil tubes and fins must be coated 
with special coating suitable to the working conditions 
The condenser fan must be propeller type with aluminium or steel blades direct driven
upward or sideward discharge, provided with protective screens mounted to the casing
Frame, blades, protective screens must be coated with special coat suitable for the environment 

Evaporator 

Evaporator coil must be of the same construction as of the condenser coil 
Evaporator coil face velocity must not exceed 2.8 m/sec 
Evaporator blower must be of the forward curved design and
sized to suit the system pressure 
Fan motors must be installed on an adjustable base and secured by a locking device
Fan drive must be through adjustable pitch pulley. Fan must be provided with sealed
permanently lubricated ball or sleeve bearings and the entire fan assembly must 
be statically and dynamically balanced 

Motor Enclosure and Insulation 

The following are the minimum requirements of enclosure and insulation for motors 
Type of Motor Enclosure
Insulation Compressor Motor
Hermetic / Semi-Hermetic Special
Condenser Fan Motor Drip-Proof Class “E” 
Evaporator Fan Motor Drip-Proof Class “A”

Control Wiring & Protection Devices 

The thermostat control voltage must be 24 volts
The A/C units being offered must feature the following minimum
requirements of safety interlocking and protective devices 

Safety electrical and mechanical interlocking of evaporator fan motor 
with compressor / heater operation and interlocking through an airflow switch
wherever duct heaters are provided

Where multiple compressors are incorporated in the units their 
operation must be in sequence in accordance with return air temperature

Manually reset and adjustable oil pressure differential cutout
of 90-sec/120 sec. trip time rating for compressors of 25 HP and above

Manually reset and adjustable high pressure and adjustable
automatic low-pressure cutout for compressor protection 

Time guard circuit for preventing compressor rapid recycling
preferably of adjustable range from 5 minutes to 15 minutes

Time delay relay for sequence starting of multiple
compressors system of minimum 15 sec. delay rating

Separate single phasing preventor suitable for three phase 
415 volts, 50 Hz. power supply to prevent the whole unit from
single phasing phase shift and under voltage with a response
time rating of maximum 2.0 sec

Inherent thermal protection for compressor motor winding 
three phase evaporator fan and condenser fan, motor windings

Inherent thermal protection or manually reset thermal or magnetic overloads 
for single-phase condenser and evaporator fan motors

External thermal overload with manual reset or MCCB of
suitable rating for all three phase motors in addition to (h) above

The unit must be controlled by a duct thermostat housed in a
suitable perforated transparent casing with a lock. Control
voltage of the circuit to which thermostat is connected must be 24 V

The control panel must be IP 54 at least 

في أمان الله 

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Choosing Single Packaged Direct Expansion Unit Selection Tips


الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين

Choosing Single Packaged Direct Expansion Unit Selection Tips

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The units must be internationally reputed, have undisputed record of performance
using(R407 or R410) and must be approved according to regulations
Units must be factory assembled, precharged, prewired and
tested.Each unit must consist of compressors, condenser
evaporator, expansion valve, filter drier, sight glass
interconnecting refrigerant, pipe work and all other standard
accessories and controls.

Casing

The casing of A/C unit must be of weather proof construction
suitable for outdoor installation, suitable for highly polluted areas
made of heavy gauge galvanized steel, baked enamel and suitable
coat finish. Top, bottom and sides of evaporator section must be
insulated with 25-mm thick fiberglass or equivalent
Evaporator of double skin construction is also acceptable
All panels must be easily removable and all components must be
easily accessible for servicing
Evaporator section must have a suitable insulated drain pan and
drain connections, the drain pan must be made of stainless steel

Compressor

Compressor must be of the reciprocating/scroll type direct coupled
to an electric motor and complete with vibration isolators and crank case oil heater.
Compressors 15 HP and below, can be of hermetic sealed
type preferably with oil level sight glass
Compressors above 15 HP must be of Semi-hermetic semi-sealed multi cylinder
type with service valves and oil level sight glass
All compressors above 15 HP must have suitable capacity control arrangement
For multi-compressor units, each compressor must have its independent refrigerant circuit

Condenser

Condenser coil must be constructed of seamless copper tubes with copper or aluminium
plate fins mechanically bonded to the tubes
Spiral or round fins are not acceptable. Maximum number of fins not
exceeds 14 per 25 mm. Condenser coil tubes and fins must be coated
with special coating suitable to the working conditions
The condenser fan must be propeller type with aluminium or steel blades direct driven
upward or sideward discharge, provided with protective screens mounted to the casing
Frame, blades, protective screens must be coated with special coat suitable for the environment

Evaporator

Evaporator coil must be of the same construction as of the condenser coil
Evaporator coil face velocity must not exceed 2.8 m/sec
Evaporator blower must be of the forward curved design and
sized to suit the system pressure
Fan motors must be installed on an adjustable base and secured by a locking device
Fan drive must be through adjustable pitch pulley. Fan must be provided with sealed
permanently lubricated ball or sleeve bearings and the entire fan assembly must
be statically and dynamically balanced

Motor Enclosure and Insulation

The following are the minimum requirements of enclosure and insulation for motors
Type of Motor Enclosure
Insulation Compressor Motor
Hermetic / Semi-Hermetic Special
Condenser Fan Motor Drip-Proof Class “E”
Evaporator Fan Motor Drip-Proof Class “A”

Control Wiring & Protection Devices

The thermostat control voltage must be 24 volts
The A/C units being offered must feature the following minimum
requirements of safety interlocking and protective devices

Safety electrical and mechanical interlocking of evaporator fan motor
with compressor / heater operation and interlocking through an airflow switch
wherever duct heaters are provided

Where multiple compressors are incorporated in the units their
operation must be in sequence in accordance with return air temperature

Manually reset and adjustable oil pressure differential cutout
of 90-sec/120 sec. trip time rating for compressors of 25 HP and above

Manually reset and adjustable high pressure and adjustable
automatic low-pressure cutout for compressor protection

Time guard circuit for preventing compressor rapid recycling
preferably of adjustable range from 5 minutes to 15 minutes

Time delay relay for sequence starting of multiple
compressors system of minimum 15 sec. delay rating

Separate single phasing preventor suitable for three phase
415 volts, 50 Hz. power supply to prevent the whole unit from
single phasing phase shift and under voltage with a response
time rating of maximum 2.0 sec

Inherent thermal protection for compressor motor winding
three phase evaporator fan and condenser fan, motor windings

Inherent thermal protection or manually reset thermal or magnetic overloads
for single-phase condenser and evaporator fan motors

External thermal overload with manual reset or MCCB of
suitable rating for all three phase motors in addition to (h) above

The unit must be controlled by a duct thermostat housed in a
suitable perforated transparent casing with a lock. Control
voltage of the circuit to which thermostat is connected must be 24 V

The control panel must be IP 54 at least

في أمان الله

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SUPPLIERS SERVICE NUMBERS أرقام مراكز الخدمات للوكلاء AL-BABTAIN CASIO BEC LG SAMSUNG


الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين 

SUPPLIERS SERVICE NUMBERS أرقام مراكز الخدمات للوكلاء 
AL-BABTAIN CASIO BEC LG SAMSUNG 

Al Babtain Group of companies
Salehia – Babtain Building No. 3 – Salah Al-Din Street

Tel: 22412730
Fax: 22491378

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ABDUL AZIZ S. AL-BABTAIN & SONS CO. FOR ELECTRICAL & ELECTRONICS

http://www.albabtaingroup.com.kw/en/Companies/Abdul-Aziz-S-AL-Babtain

Established in 1973
Electronics products
BEC GIGASET GREE CASIO

Salehia – Babtain Building No. 3 – Salah Al-Din Street
Phone: 22410419
Fax: 22491378
EXHIBITIONS
Salhiyya : 22458727
Fahad AlSalem : 22411782 / 22430761
Hawally : 22652360
Salmiya Cooperation : 25752326 / 25738321
Salmiya – Wataniyya complex : 25731930 / 25738321
Farwaniya :24710546 / 61

===========

MASSAD CO. W.L.L

http://www.albabtaingroup.com.kw/en/Companies/Massad-Co-WLL

Established in 1995

BRANDS

SANNINE JAW VLASIC KIRI KERRYGOLD B&M SHOPRITE
COUNTRY FARM HOLSTEN VQR TULIP ELLE&VIRE 
POWER HORSE PASEO LIBBYS PFEIFFER QUALITEA
MALIZIA CORAYA LAVACHE ARIAS

AL- BABTAIN ELECTRONICS CO 

http://www.albabtaingroup.com.kw/en/Companies/Al–Babtain-Electronics-Co

Established in 1999

BRANDS

LG

Ardhiya industrial piece 5 next to DHL
Tel: 24331279 – 24314528 – 24314529 – 24312479
Fax: 24314615 – 24338348

========

Al-Babtain Air-Conditioning and Refrigeration Co. BACR

http://www.albabtaingroup.com.kw/en/Companies/Al-Babtain-AC-and-Refrigerating-Co-BACR

Established in 2003
BRANDS

L.G

Ardhiya industrial
Phone: 24347988
Fax: 22491378

===========

AL-BABTAIN TURNKEY SOLUTIONS CO

http://www.albabtaingroup.com.kw/en/Companies/Al-Babtain-Turnkey-Solutions-Co

Established in 1999
BRANDS

SAMSUNG

Salehia – Babtain Building No. 3 
Salah A-Din Street 
Phone: 22470185 
Fax: 22460487 
EXHIBITIONS
Airport : 24310061
Fahaheel : 23921040/50
Farwaniya : 24726170
Jabriya : 25329181/2
Salwa : 25637018
Hawally – Tunis Street : 22667546

=======

RAAD TRADING & MARKETING CO

http://www.albabtaingroup.com.kw/en/Companies/Raad-Trading–Marketing-Co

established in 1963
BRANDS

NEGRO WINDEX KENNYS PLEDGE MR MUSCLE DISNEY 
BAYGON BARBIE PERRIER MAZOLA GLADE 
STEEN LAND HOT WHEELS ZAINI RAID

Ardhiya industrial
Phone – 24315747 – 2433725- 24337252
Fax: 24341366

في أمان الله 

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THERMAL INSULATION AND LAGGING HVAC CLADDING


الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين 

THERMAL INSULATION AND LAGGING HVAC

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General Requirements

Thermal insulation shall be of approved material with thermal conductivity 
not higher than 0.29 Btu/Hr/Ft2/F inch thickness measured at an average 
temperature of 100 F. Thermal insulation shall be non-corrosive to the metal
water repellent, sustenance to vermin and easily cut and fitted to shape during application
The insulation should be resilient and retain its original shape
The insulation shall be provided with approved fire retardant vapour barrier
jacket to prevent the moisture penetration to the insulation
Vapour barrier shall also be applied to all joints and edges

The insulation shall be fixed on to the metal surface by means of an 
approved adhesive compound that has no corrosive effect on the metal 
and thoroughly applied to the metal surface and insulation
The insulation shall be carried out by skilled labourers and before thermal
insulation is applied, all metal surfaces shall be thoroughly cleaned and treated
with approved corrosion inhibitors

Piping Insulation

The insulation shall be secured to the piping by adequate number of 
non-corrodable straps ¾” width at a center distance not more than one foot

The straps shall not in any case cut the insulation or the vapour seal
Wires shall not be acceptable

Insulation Material Thickness

Insulation material shall be Fiberglass 6 lb/Ft³ & shall have the following thickness

Pipe Size Up to 2” dia 2½” – 6” dia 8” dia & above

Chilled / Hot Water Pipes exposed to Sun 1” 2” 3”

Chilled/Hot Water Pipes in non-A/C areas 1” 1½” 2”

Chilled / Hot water pipes in A/C areas 3/8” 1” 1½”

Condenser Water (Cold) pipe from cooling tower to condenser exposed to sun 1” 

Condensate drain pipe 3/8” 5/8”

All pipes running inside the A/C Plant room, A/H unit rooms and other 
machinery rooms also inside the piping shaft or were they are exposed 
to view shall be covered with heavy gauge “not less than 22” aluminium sheet
and in any case the designation and direction of fluid flow shall be suitable 
marked on the surface at intervals. Weather and water proofing treatment to 
be carried out prior to cladding

Duct Work Insulation

The thermal insulation used shall confirm to BS 5422: 1977 – BS 5422: 2009

The thermal insulation shall be made of fiberglass material with reinforced 
aluminium foil external coating, factory applied with resin bonded internal 
layer to give flat and resilient surface. The insulation of all duct works exposed 
to outside and those in plant rooms shall be rigid slab type and for remaining
ducting flexible blanket type

Thermal conductivity shall not be more than 0.29 Btu/Hr. Sq. Ft. per inch thickness 
measured at an average temperature at 100° F. The thermal insulation shall be non-corrosive

The insulation shall be provided with fiber retardant
vapour barrier jacket to prevent moisture and penetration
Vapour barrier shall also be applied to all joints and edges

The insulation shall be applied to metal surface by means of 
approved non-corrosive adhesive compound.
The metal surface shall be treated with corrosion
inhibitors before the application of insulation

The density of insulation shall be minimum 1.5 lb./cu. ft. for flexible 
blanket type and 3 lb./cu. ft. for rigid slab type and thickness 

All duct works exposed outside and those in plant 
room shall be insulated with 2” outside insulation

Duct works inside air-conditioned spaced shall be 
insulated with one inch thick outside insulation

h. Insulation shall be secured to duct work with 2” x 2” G.I. sheet metal 
strips of 22 gauge fixed to corners and tightened with wire 6” intervals
The strips may be suitably grooved to take the wire fasteners

In addition, all duct works exposed to outside be cladded with 24 gauge GI sheeting 
and shall be treated for water proofing prior to cladding, i.e. wrap 
the insulation with 0.5mm thick polyethylene sheet and secure the adhesive
All the duct works in plant room shall be finished with 8 Oz. Canvas
with 2 coats of fire retardant and water proof paint.

All external duct cladding shall be painted with one coat of primer suitable for
galvanized surface and two coats of final paint suitable for external application
Colour of paint should match the building and approved by the Engineer

Acoustic Duct Lining

Internal duct lining for acoustic insulation where applicable shall 
not be less than 25 mm. thick fiberglass mat faced, flexible blanket
of fine fibers with securely bonded surface mat coated with black 
neoprene or approved equal. Lining shall be applied with 100% coverage
of fire resistive approved adhesive compound and mechanical fastenings 
according to the manufacturer’s instructions. Acoustic lining shall be 
cleared 20 cm. on each side of the duct heater where applicable
Duct lining density shall be 24 kg/cubic meter

في أمان الله 

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KUWAIT ALUMINIUM شركة مصانع الألمنيوم والنحاس الكويتية عناوين مراكز الصيانة للوكلاء الكويت


الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين 

شركة مصانع الألمنيوم والنحاس الكويتية عناوين مراكز الصيانة للوكلاء الكويت 
KUWAIT ALUMINIUM

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http://kuwaitaluminium-sabhan.blogspot.com

المصنع : دولة الكويت صبحان الصناعية قطعة 9 تقاطع شارع رقم 102 و شارع رقم 105 قسيمة رقم 35

تليفون رقم 
tel 22089988
فاكس رقم 
fax 24715770 / 24721815

المعرض بالشويخ الصناعية خلف المخفر القديم عند دوارشهرزاد على الزاوية
فاكس رقم
fax 24840204 / 24840202
رقم الهاتف
tel 24736885 / 24715884

فاكس
24715770

البريد الإلكتروني
KABCOL-NAHASS@HOTMAIL.COM

في أمان الله 

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