The valve is opened/closed by the valve disc moving in a direction parallel to the valve seat hole axis and can only be installed on horizontal pipelines with the major function of preventing medium backflow when shutting down the pump and maintaining the water column required by pumping.
Quick valve disc closedown,low water hammer pressure;
Smooth flow passageway and small fluid resistance;
Low volume, light weight, Short structural length;
Narrow valve travel and small closedown impact;
Flexible action and good sealing performance;
Long service life and good reliability.