Flap check valve KP-KOL-67-67
The use of flap valves inverse KP - KOL - 67 - 67
Special type series for a complete channel with fans in square KP - KVARK - N, KP - KVARK - EU.
Backward flap KP - KOL prevent flow of air and non - explosive mixtures of air from different premises one ventilation system.
Flap check valve prevents ingress of external air and precipitation in the room to be served after the fan is turned off.
The movable airbag medium should not contain substances aggressive to aluminum and aluminum alloys.
It must not contain sticky substances and fibrous materials.