RVE 100 – Helios – In-duct Back Draught Shutter, Air Tight
By simply inserting it into ventilation pipes, ideal for retrofitting. Plastic ring with all-round double lip seal and tight-fitting rubber membrane that opens when there is negative or positive pressure. Supplied with two membranes for different flow rates. With horizontal flow, the positioning of the web that holds the rubber membrane must always be vertical. Temperature range from -20 to +90 ° C.