Plastic Backdraft Damper with Fixer description

The plastic non-return valve is a simple assembly, its main function installed in the system is to allow the flow of medium in only one direction. We install it in the system if for any reason we do not want the medium to flow back. The flow loss is small, the opening pressure is a few tens or a few hundred millibars. Based on the flowing medium, there are also non-return valves for clean water, sewage, air and special media.