In the original swing Check Valve disc adding hydraulic slowly-closing vice valve (figure 1). In the vice valve, under the disc screw and use both side or connected to the normal flow, medium, medium pressure when the valve opens, vice valve opens, medium will flow through the small vice valve outlet valve, the Valve inlet pressure, the main valve disc, the main valve opens and equilibrium pressure, Media, the main valve upstream disc in countercurrent medium speed, and upper body shut, vice deputy for buffer cylinder, upper body revolving valve cover a hole on the cover, vice disc stem to live with a certain plug gap, air cushion between piston and cylinder by rubber sealing ring type O, piston, lower and the disc sealing for plane, When the vice disc along with the main valve disc close and closed because vice valve cover the holes, mass flow through the holes gradually interfaces on a cylinder valve buffer vice cavities, part of medium by vice disc and the clearance between the piston rod backflow Valve piston, vice is slow. The structure of the main valve shut off stage, equivalent to fast valve shut slowly closing stages according to slow, pumping hydraulic and mechanical units to illustrate the design of structure transition mechanism can be effective in preventing water hammer booster.

Butterfly Valves

Safety valves

Reducing Valves

Needle Valves

Bellow Seal Valve