By selection of valve prevent the media back

The role of this type of valve is only to allow the medium to flow in one direction, and stop the flow direction. This valve is normally automatically work under the pressure of the fluid flow in one direction, the valve opens; opposite direction of fluid flow, fluid pressure and the valve from the coincidence of the role of the valve seat to cut off the flow. shut off solenoid valve
Check them belong to this type of valve, which includes a swing check valve and lift check valves. Swing Check Valve ordinary hinge, there is a door the same disc as freely against the inclined seat surface. In order to ensure that the valve every time to reach the appropriate location of the seat surface, the valve design in the hinge mechanism, so that the valve flap is enough to swing space, and make a real flap valve, and comprehensive in contact with the valve seat. All valve can be made of metal, leather, rubber, can also be embedded in the metal or synthetic cover, depending on the use of performance requirements. Swing check valve in the fully open position, the fluid pressure almost unhindered, so a relatively small pressure drop through the valve. Lift check valve valve is located in the seat sealing surface of the valve body. This valve in addition to the valve disc is free to lift, like the rest of the shut-off valve, the fluid pressure valve from the valve seat sealing surface lift the medium return valve seat valve down and cut off the flow. According to the conditions of use, the valve can be all metal construction, it can be embedded in the valve rack rubber mat or rubber ring form. Like the cut-off valve, the fluid is also a narrow channel through the lift valve, lift check valve pressure drop than the swing check valve, swing check valve flow restrictions on Very little. mini solenoid valve