Valves

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Valves

  1. 1. VALVES TYPE & FUNCTION VALVES
  2. 2. Valves <ul><li>On-Off Service </li></ul><ul><li>Throttling (Regulating) Service </li></ul><ul><li>Prevention of back flow </li></ul><ul><li>Pressure control (Control Valve) </li></ul>
  3. 3. ON – OFF SERVICE
  4. 4. Gate valve.
  5. 5. Gate Valve :- <ul><li>ON – Off Valve ,Used in: </li></ul><ul><li>1-Water. </li></ul><ul><li>2- Oil. </li></ul><ul><li>3- Gas </li></ul><ul><li>4- Steam </li></ul><ul><li>And Other Fluid Services. </li></ul>
  6. 6. Wedge gate valve and parallel slide valve
  7. 7. Gate valve 2.
  8. 8. Plug valve (on-off) or Cock low-pressure
  9. 9. Plug valve (on-off) or Cock
  10. 10. Plug valve Applications <ul><li>Gas and liquid fuel </li></ul><ul><li>Water. </li></ul><ul><li>Extreme temperature flow </li></ul><ul><li>Boiler feed water. </li></ul><ul><li>Low Pressure Steam . </li></ul><ul><li>Corrosive Liquids and Gases </li></ul>
  11. 11. Ball Valve (on-off)
  12. 13. Ball Valve Quarter-Turn <ul><li>Hydraulic systems . </li></ul><ul><li>Water . </li></ul><ul><li>Air. </li></ul><ul><li>Oil . </li></ul><ul><li>Petrochemical . </li></ul><ul><li>High volume, high pressure and high temperature flow . </li></ul>
  13. 14. THROTTLING (Regulating) SERICE
  14. 15. Globe Valve (High pressure & value )
  15. 16. Globe Valve.
  16. 17. Globe Valve Ops.
  17. 18. Needle Valve <ul><li>Fine accurate flow Cont. </li></ul>
  18. 19. Butterfly Valve <ul><li>Flow Control </li></ul><ul><li>Low Speed </li></ul><ul><li>Both Side flow </li></ul>
  19. 21. Butterfly Valve 2
  20. 22. Prevention of back flow
  21. 23. split disc check
  22. 24. Split disc check valve operation
  23. 25. lift check valve (Recommended for Vapor service)
  24. 26. Swing check valve (liquids) installed horizontal & vertical
  25. 27. Swing check valve Ops.
  26. 28. Piston check valves
  27. 29. check valves
  28. 30. Ball check valve (for heavy fluids) installed horizontal ,vertical & angle
  29. 31. Check valve (Ball)
  30. 32. Pressure Relive valves
  31. 33. safety valves and relief valves <ul><li>Safety valves are primarily used with compressible gases and in particular for steam and air services . </li></ul><ul><li>Relief valves are commonly used in liquid systems </li></ul>
  32. 34. Pressure Relief Valves <ul><li>Releases excess pressure to protect system. </li></ul><ul><li>Use with Gases & Vapors & liquid. </li></ul><ul><li>Open Full at once at set pressure. </li></ul><ul><li>Outlet port larger than inlet port. </li></ul><ul><li>Never adjust whilst in service. </li></ul>
  33. 35. Type of Pressure Relief Valve <ul><li>Safety valve : Used with compressible gases . steam and air services . </li></ul><ul><li>Relief valve : Used in liquid systems. as pressure overspill devices . </li></ul><ul><li>Safety relief valve : used either for liquid or compressible fluid. </li></ul>
  34. 36. Pressure Relieve valve (safety valve) for clean air <ul><li>Releases excess pressure (clean air) </li></ul>
  35. 37. Safety valve - liquid applications, opens in proportion to the
  36. 38. Typical examples of safety valves used on steam & Air systems
  37. 40. pneumatic pressure reducing
  38. 41. <ul><li>Control system would normally consist of the following components: </li></ul><ul><li>Control valves. </li></ul><ul><li>Actuators. </li></ul><ul><li>Controllers. </li></ul><ul><li>Sensors. </li></ul>
  39. 42. Globe Valve.
  40. 44. Valve positions
  41. 45. Orifice plate
  42. 46. pressure gauge

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