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Valve definition term

  • Author:Damon Lee
  • Source:RKSfluid Valve Group
  • Release on :2019-08-30
1.Valve (valve)
The total number of mechanical products with movable mechanisms used to control the flow of media within the pipe.
2.Gate valve
The opening and closing member (gate) is driven by the valve stem, and the valve is lifted and moved along the valve seat (sealing surface).


3. Globe valve, stop valve
The open-close type (valve) is a valve that is driven by the valve stem and moves up and down along the axis of the valve seat (sealing surface).
4. Throttle valve
The passage cross-sectional area is changed by the opening and closing member (valve) to adjust the flow rate and pressure of the valve.
5. Ball valve
A valve that opens and closes (sphere) about a curve that is perpendicular to the passage.


6. Butterfly valve


Open-closed (butterfly) valve that rotates around a fixed axis.
7. Diaphragm valve
The open-close type (diaphragm) is a valve that is driven by the valve stem, moves up and down along the axis of the valve stem, and separates the action mechanism from the medium.
8. Plug valve (cock)
A valve that opens and closes (plug) about its axis.
9. check valve, non-return valve
Open-closed (valve) A valve that automatically blocks the flow of media by means of medium force.


10. Safety valve, relief valve
Open-close type (valve) Automatically opens the discharge when the medium pressure in the pipeline or machine equipment exceeds the specified value; the valve that automatically closes when the pressure is lower than the specified value, and protects the pipeline or machine.
11. Pressure reducing valve
Through the throttling of the opening and closing member (valve), the pressure of the medium is lowered, and the valve pressure is automatically maintained within a certain range by the direct action of the pressure after the valve.
12. Steam trap
A valve that automatically discharges condensate and prevents it from leaking.
13. Draining Valves
Valves for the discharge of boilers, pressure vessels and other equipment.
14. Low pressure valve
Various valves with nominal pressure PN ≤ 1.6MPa.
15. Middle pressure valve
The nominal pressure is various valves with PN ≥ 2.0 ~ PN < 10.0 MPa.
16. High pressure valve
Various valves with nominal pressure PN ≥ 10.0 MPa.
17.Super high pressure valve
Various valves with nominal pressure PN ≥ 100.0 MPa.
18. High temperature valve
For various valves with media temperatures >450 °C.
19. Sub-zero valve
For a variety of valves with a medium temperature of -40 ° C ~ -100 ° C.
20. cryogenic valve (cryogenic valve)
For various valves with media temperatures <-100 °C.