QF Back Pressure Flap Valve
QF back pressure flap valves allow air to flow one way through a Nordfab QuickFit duct line and close against flow in the other direction — protecting the system from back pressure and stopping air (and dust) being pushed back down the run when the line is idle.
Galvanised steel with QuickFit rolled ends, each valve clips straight into the duct with Quick Clips, so it can be fitted, checked and repositioned without tools.
Nine diameters are available: 160, 200, 250, 315, 350, 400, 450, 500 and 560mm.
For controllable shut-off and balancing rather than one-way protection, see the manual and regulating dampers in the main QF Dampers range.
Showing all 9 results
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Nordfab QF Back Pressure Flap Valve – 160mm – Galvanised
£491.95 + VAT Add to basket -
Nordfab QF Back Pressure Flap Valve – 200mm – Galvanised
£594.40 + VAT Add to basket -
Nordfab QF Back Pressure Flap Valve – 250mm – Galvanised
£649.81 + VAT Add to basket -
Nordfab QF Back Pressure Flap Valve – 315mm – Galvanised
£720.05 + VAT Add to basket -
Nordfab QF Back Pressure Flap Valve – 350mm – Galvanised
£793.38 + VAT Add to basket -
Nordfab QF Back Pressure Flap Valve – 400mm – Galvanised
£905.30 + VAT Add to basket -
Nordfab QF Back Pressure Flap Valve – 450mm – Galvanised
£1,021.56 + VAT Add to basket -
Nordfab QF Back Pressure Flap Valve – 500mm – Galvanised
£1,092.33 + VAT Add to basket -
Nordfab QF Back Pressure Flap Valve – 560mm – Galvanised
£1,184.30 + VAT Add to basket