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Back Draught Dampers

The pressure relief valve PVA is used for preventing the reverse of air-flow in circular duct systems. The casing of PVA is made from galvanized steel, the blades are made of aluminium.

Back Draught Dampers

Model ΦD(mm) L1(mm) L(mm)
PVA100 96 6 88
PVA125 121 19 88
PVA150 146 31 88
PVA160 155 36 88
PVA200 197 56 88
PVA250 247 61 128
PVA315 312 94 128
PVA355 352 65 198
PVA400 397 64 198
PVA450 447 80 248
PVA500 497 107 248

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