The H41S Vertical & Horizontal check valves a number of type non-return check valves (one-way valve): check valve, also known as a one-way valve or check valve, whose role is to prevent the media back in the pipeline. Pump water off the end of the valve a check valve class. 
 Opening and closing pieces by medium flow and strength of its own open or closed, to prevent flow reversal valve is called non-return valve. Check valves are automatic valves, mainly used in pipes of medium flow in one direction, only allowing media to flow in one direction to prevent accidents 
 The check valve (one-way valve): automatically prevents fluid backflow valve. The check valve in the fluid under pressure to open, fluid flows from the inlet side of the exit side. When the inlet side of the pressure is lower than the export side of the flap valve in the fluid pressure, gravity itself and other factors automatically close to prevent fluid backflow. 
 Nominal pressure: PN0.5-16Mpa 
 Operating temperature :0-550 ℃ 
 Nominal diameter: DN15-150mm 
 Connection type: flanged, threaded, welded 
 Material: 304,316,304 L, 316L, SS316, WCB, WC6, WC9, CF3, CF8, cast steel, cast iron, ductile iron, forged steel, stainless steel and so on. 
 Valve