Hydraulics Valves

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It is good for understand hydraulics valves basic knowledge.

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Hydraulics Valves

  1. 1. Telescopic cylinder
  2. 2. Check valve
  3. 3. Check valve circuit
  4. 4. Pilot operated check valve
  5. 5. Shuttle valve
  6. 6. Pressure control valve Relief valve Reducing valve Unloading valve Sequence valve Counter balance valve
  7. 7. Pressure relief valve
  8. 8. Guided poppet design/Differential piston
  9. 9. Explode view Pilot operated PR valve
  10. 10. Open / Closed position pilot operated PR
  11. 11. Used of PR
  12. 12. Construction Pilot operated PR
  13. 13. Compound /pilot operated pressure relief valve
  14. 14. Remote piloting/multiple pre. selection
  15. 15. Venting Pilot operated PR
  16. 16. Valves Directly operated pressure reducing valve
  17. 17. Valves Directly operated pressure reducing valve
  18. 18. Direct operated pre. Reducing valve
  19. 19. Valves Directly operated pressure reducing valve 1 - állító elem, 2 - vezérlő vezeték, 3 - nyomórugó, 4 - vezérlő tolattyú, 5 - vezető él, 1 – adjusting element 5 – governing edge 6 - rugótányér + résolaj vezeték Y, 7 - visszacsapó szelep, 8 - mérőpont 2 – governing line 6 – spring plate and leakage line 3 – spring 7 – check valve 4 – governing spool 8 – measuring point
  20. 20. Pressure reduction valve circuits
  21. 21. Pilot operated reduction valve
  22. 22. Multifunction pressure control
  23. 23. Uses of multifunction pre. Control valve
  24. 24. Bi-directional pressure regulation circuit 3 3 2 2 1 1 (a) (b)
  25. 25. Multi-pressure regulation circuit 2 3 to system to system 4 2 to system 1 3 1 (c ) (a) (b) Bi-stage pressure regulation circuit and multi-stage pressure regulation circuit can reduce overflow power loss.
  26. 26. Sequence valves Sequence valves cause a hydraulic system to operate in a pressure sequence. They are used to control the order of various actuators of a hydraulic system. As soon as the inlet pressure reaches a preset pressure value, the sequence valve will open and let oil pass to a secondary circuit. Sequence valves have two types—direct-acting and pilot- operated. They can also be classified as internal control and external control types according to where the control pressure is from.
  27. 27. Sequence valve circuit
  28. 28. Sequence valve
  29. 29. Pressure Control Valves One-way sequence valve and counterbalance valve (a) (b) (c) (d) (a) One-way internal control sequence valve (b) One-way external control sequence valve (c) One-way internal control counterbalance valve (d) One-way external control counterbalance valve
  30. 30. Counter balance circuit
  31. 31. Counter balance circuit
  32. 32. Unloading valve
  33. 33. Summary No. Pressure Measure and Outlet leakage symbol valve control quantity port to p p 1 Pressure Inlet pressure tank to have no K relief drain port T T 2 Unloading Pilot pressure tank to have no p K valve drain port T 3 Pressure Outlet pressure actuator to have a P1 reducing drain port L valve P2 4 Sequence Inlet/pilot actuator to have a P1 L K P1 L valve pressure drain port P2 P2 5 Counterba Inlet/pilot tank to have no P P K lance pressure drain port T T 6 Pressure Inlet port switch pressure

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