Slide-in backflow flap / internal non-return flap Nominal width 100 mm to 200 mm Opens smoothly, low pressure loss Closes securely, no noise, no rattling The damper is inserted into the ventilation duct For vertical and horizontal installation Housing: Galvanised steel Damper blade: Aluminium Shaft and spring: Stainless steel The non-return damper is used in round ventilation ducts to prevent air backflow. The casing is made of galvanised sheet steel. The damper blades are made of aluminium and the shaft and spring are made of stainless steel. The internal rubber seal reduces noise. The outer foam strip provides a good seal and secures the non-return flap in the pipe. The non-return damper is designed for operation at ambient temperatures up to 60°C, for the transport of clean air, free of coarse dust, grease, chemical vapours and other impurities.

Backwater flap / non-return flap Nominal width 100 mm to 200 mmLength: 90 mm Nipple connection at both ends Opens smoothly, low pressure loss Closes securely, no noise, no rattling For connecting two ventilation ducts For vertical and horizontal installation Housing: Galvanised steel Damper blade: Aluminium Shaft and spring: Stainless steel

Stainless steel non-return flap with seal Ø 100 mm, l = 130 mm Non-return flap made of stainless steel 1.4301 (V2A), with seal made of EPDM material. For inhibiting backflow. The non-return damper is suitable for connecting spiral ducts with a diameter of 100 mm. Horizontal and vertical installation. The labelling must be observedduring installation.

Stainless steel non-return flap with seal Ø 100 mm, l = 130 mm Non-return flap made of stainless steel 1.4301 (V2A), with seal made of EPDM material. For inhibiting backflow. The non-return damper is suitable for connecting spiral ducts with a diameter of 100 mm. Horizontal and vertical installation. The labelling must be observedduring installation.