Machine made round metallic duct systems such as METAL FLEX for air handling and ventilation applications are being preferred to conventional duct systems world wide. Round ducts have high strength to weight ratio and this invariably means lower cost per ton of air conditioning or per m3 flow of air.
Near zero permeability of round metallic ducts has earned them a class 0 (Zero) Fire Hazard rating. Being machine made, no fabrication on site is required. METAL FLEX ducts can be supplied in any convenient lengths, thereby reducing the number ofjoints for a given layout. Field jointing can be carried out using readily available jointing kits. Availability of standard accessories and fittings permits fast installation on site. Low weight per unit length of these ducts allows larger hanger spacings upto 1 0' (3.00 m.) centres. The strength of round ducts makes them the preferred shape for underground or concealed applications.
However, the most outstanding feature of the round duct system is the use of flexible metallic ducts. It eliminates the need for fabricated bends. Their installation is simple and cumbersome alignment of flanges is totally avoided. Metal Flex flexible metallic ducts are ideally suited for applications where the space is limited and where other design considerations limit the available head space. These ducts can literally "snake!' through cramped spaces, recesses and corners, thus making climate control possible in difficult layouts; a job which would have looked hitherto impossible using conventional ducting. Features such as these make METAL FLEX flexible metallic ducts an air handling system designer's delight. The pressure drop data of round metallic ducts compares favourably with data for alternative systems. The ducts can be conveniently insulated using conventional materials such as glass wool.
No limitation to installed Length.
CONSTRUCTION : Type IOOA& 140 A special aluminium alloy prevents corrosion and metal fatigue. Close tolerance machine fabrication produces a continuous lock-seam that permits duct to be compressed, pulled open, bent and rebent without developing leakage.
|Static Pressure 3" to 10" diameters 12" to 18" diameters||12" (300mm.) WC. Positive & Negative|
|8" (200mm.) W.C. Positive & Negative|
|Maximum Velocity||5000 f.p.m. \ (25 m/sec.)|
|Temperature Range||-1 to 435 0F \ (-73 0C to 224 0C)|
No limitation to installed length