Operating Principal of Lift Check Valve
It's two important abilities are preventing countercurrent, and water-hammer.

1 When the pump starts to operate, the pressure of fluid reaches on A side.

2 With over 0.3kgf/G, the pressure of fluid on A part, can be passed by lifting
     B seat with little energy.

3 Lift Check valve's operation is senitive, therefore, it can lift up B completely with
     minimum 0.4kgf/G

4 But if the movement of the pump stops, the liquid which was climbed up through the
     pipeline would flow backward again. At this moment, Smolensky Check Valve's seat
     which was lifted up with little energy would come down again and close A side.
     this condition will prevent countercurrent.

5 Water Hammer means a series of pressure shocks created by a sudden change in flow
     velocity of a liquid in a pipe. when any part of pipe line stays in vacuum, the pressure of
     liquid is hammering a part of the pipeline. As you see in picture 5, when the pump stops,
     Part A will become vacuum. But filling the liquid into A part by turning the handle will
     prevent water-hammer.
     Accordingly, Lift-Check Valve has developed to protect pipeline from water-hammer,
     prevent countercurrent and save energy.


User's Notice
1. By-pass valve: Close it and use.
    If a hood valve is defected, open the valve and send proper amount of fluid
2. Fluid in a pipe shouldn't be mixed and run with other substances such as sand,
    and weldment grit.
3. Use a high-temperature typed valve when it is over 60
4. Use an appropriate check valve for the applied fluid.
5. If the applied fluid is different, or has special option, please consult with our sales people
    in a head office.
6. Install the fluid from the bottom to the top when installing the valve.