Valves have different types and functions depending on the type of service. The main types are on-off valves like gate valves, plug valves, and ball valves which are used to start and stop flow. Throttling or regulating valves like globe valves and butterfly valves are used to control the flow rate. Check valves prevent backflow and include swing check valves, lift check valves, and ball check valves. Pressure relief valves like safety valves and relief valves are used to release excess pressure to protect systems. Control valves combined with actuators, controllers and sensors are used for automatic pressure control.

1. VALVES TYPE & FUNCTION VALVES

3. ON – OFF SERVICE

4. Gate valve.

6. Wedge gate valve and parallel slide valve

7. Gate valve 2.

8. Plug valve (on-off) or Cock low-pressure

9. Plug valve (on-off) or Cock

11. Ball Valve (on-off)

14. THROTTLING (Regulating) SERICE

15. Globe Valve (High pressure & value )

16. Globe Valve.

17. Globe Valve Ops.

21. Butterfly Valve 2

22. Prevention of back flow

23. split disc check

24. Split disc check valve operation

25. lift check valve (Recommended for Vapor service)

26. Swing check valve (liquids) installed horizontal & vertical

27. Swing check valve Ops.

28. Piston check valves

29. check valves

30. Ball check valve (for heavy fluids) installed horizontal ,vertical & angle

31. Check valve (Ball)

32. Pressure Relive valves

37. Safety valve - liquid applications, opens in proportion to the

38. Typical examples of safety valves used on steam & Air systems

40. pneumatic pressure reducing

42. Globe Valve.

44. Valve positions

45. Orifice plate

46. pressure gauge