RK 200 mm Ventilation Fitting with Check Valve

The RK 200 mm sheath fitting with backflow flap from is very robust and durable. The housing is made of galvanized steel and the blades ofuro shutter are made of aluminum. Two stainless steel springs ensure automatic closing, while the rubber ring ensures closing and quiet operation. The check valve prevents cold air and hot air from entering through the ventilation duct. The valves open when the exhaust fan blows stale air and automatically close as soon as the airflow stops. The flaps should be aligned horizontally to close optimally. This backflow valve can also be used for home ventilation, passive ventilation, air conditioning pipe fittings, ventilation fittings, systems and heat recovery systems. Suitable for all standard round ventilation pipes and 200 mm flexible ducts according to. Designed for sustainable ventilation systems, ideal for home improvement. Can be used to connect multiple lengths of pipes together to form a long duct path or to connect directly to a fan. We have been ventilation experts for over years. If you have any questions or complaints, please contact our customer service directly. Your request will be processed immediately.