By selecting the valve to prevent the media back

The role of this type of valve, in order to prevent the medium flow in one direction, and stop the flow direction. The valve under normal pressure, the automatic operation of the fluid flowing in one direction, opposite to the direction of flow of the fluid, the pressure of the fluid and valve from the valve seat of the role of the overlap, the valve is opened to cut off the flow.3 way air valve Check that they belong to this type of valve, which contains a one-way valves and lift check valve. Check valve ordinary hinge, there is a door the same disk, tilt the seat of freedom. In order to ensure that the valve allows the valve seats, each pivotable valve structure in the link mechanism enough space, the valve really arrives in contact with the valve seat and including the corresponding position. All valves are made of metal, leather, rubber, can also be embedded in the metal or plastic cover, depending on performance requirements. The check valve in the fully open position, the fluid pressure is almost unhindered through the valve is a relatively small pressure drop. Lift check valve in the valve seat sealing surface. The valve on the valve plate of the next one is free to lift, as the rest of the shut-off valve lift fluid from the pressure valve seat sealing surface, medium back seat cut and the flow. According to the terms of use, the valve can be all metal construction, it can be embedded in the valve holder rubber mat or rubber ring shape. Valves, fluid through the valve is a narrow channel, the lift check valve pressure drop than swing check valve, swing check valve valve flow restrictions.solenoid valve actuator