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DUCTWORKS Selection Tips DETAILED TECHNICAL SPECIFICATION

Discussion in '??????? ????????' started by mannan, 10/10/17.

  1. mannan

    mannan Administrator Staff Member


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    DUCT WORKS Selection Tips DETAILED TECHNICAL SPECIFICATION

    [​IMG]Joints Turning VanesVolume Control DamperFire DampersGrilles 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 DoorsFlexible 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[​IMG]

     

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