In the pump stops, the valve closing process to complete its own weight

Check valve is an effective way to prevent fluid backflow prevent reverse impeller pump runaway protection device, it is widely used in industrial agricultural production. Currently used mostly for hanging flap check valve check valve, no external  Instrument needle valves . In the pump stops, the valve closing process to complete its own weight. It is characterized by simple, inexpensive, back flow is small. Its  2 way manifolds  off valve water hammer bigger. This is reflected in two aspects: one is a sudden when the pump stops, the valve began to move, when you close to a relatively small opening, the fluid backflow may occur, under the impact of the liquid in the back, there will be a sudden closure of the valve process, resulting in a direct water hammer.

Shuttle valve body is carbon steel or stainless steel

In the petroleum, chemical, natural gas, heating network, metallurgy, nuclear power, aviation, water network and other fluid transport in various industries are using the check valve prevents fluid backflow. Usually the check valve closed by gravity, the installation location is limited, the sealing performance is poor. Four Chuanjia Wei Fluid  2 way manifolds  Co. developed the shuttle valve to overcome the general lack of check valves to meet the broad needs of various industries. Shuttle valve body is carbon steel or stainless steel. Standard flanged ends. Valves and valve  Stainless steel needle valve  metal seal or soft seal (rubber). Close the valve spool but do not rely on gravity attach an internal preload, so the installation position is not limited. When the shuttle valve before the pressure is less than (or equal to) the pressure valve, the spool valve preload move forward to push off. Even very low back pressure valve is also closed the case very closely. In addition, a buffer spool cavity, slow valve closing speed, which reduces the water hammer pressure shock wave.