Circular flanges

• Flat bar flange has elongated screw holes
Ø mm W x T mm
80-125 25 x 3
150-250 30 x 4
280-500 35 x 5
560-1000 40 x 5
1120-1250 50 x 6

• Matching flange is drilled and slots within Spiral duct

Manufactured from 1.2mm galvanised mild steel

• Rolled angle flange is non-drilled
Ø mm W x H x T mm
300-630 40 x 40 x 3

• Rapid-lock ring has a toggled closure mechanism with an integral ring seal

• Verroloc flange features a quick closure and release latch for easy separation of ducts

Manufactured from galvanised mild steel with internal non-toxic sealant

Conforms to specification DW144 and independently tested by BSRIA to DW/TM1