First, H664Y extraction check valve purposes
The extraction check valve is mainly used for steam turbine power plant steam extraction system to prevent the media or water back to the turbine pumps and other important facilities play a protective role, the performance requirements for the pipeline medium Back flow, power outages, accidents and other abnormal state, the valve instantly shut down, close time is less than 0.5 seconds.

 Second, H664Y pumping check valve performance specifications
 1, the nominal pressure:

2, the medium: water, steam, air, oil 
3, the working temperature: 

Third, H664Y suction check valve main dimensions