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Oilgear Pump Controls

Oilgear Pump Controls

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Oilgear Pump Controls

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  1. OilgearPump Controls PVWJ, PVG, and PVV

  2. Pump Controls • 3-way Style (PVWW/PVWJ) • Typically used in circuits where fast response times are not necessary.

  3. 3- way Control Circuit

  4. 3- way Pressure vs Volume

  5. Pump Controls • 3-way Style (PVWW, PVWJ) • Typically used in circuits where fast response times are not necessary. • 4-way Style (PVG, PVV) • Typically used in circuits where fast response is critical.

  6. 4- way Control Circuit OP-2

  7. 4- way Pressure vs Volume

  8. PVWJ Controls

  9. 3-way Style ControlsPVWJ • P-1NN, P-LNN Single Pressure Compensator • P-1NN/F Load Sense Compensator (PVWJ) • P-CNN, P-KNN Soft start Compensator • HP Horsepower Limiter • G Horsepower limiter with load sense

  10. PVWJ P-1NN Control Access for lifting eye Pressure adj. Screw RP Port

  11. 3-Way - P-1NN or P-LNN P-1NN or P-LNN CN Control CN Control

  12. Full Stroke Optional Minimum Volume Stop Pressure Compensator Adjustment Spool Drain Plug 361 Maximum Volume Stop

  13. Zero “Slip Stroke” Optional Minimum Volume Stop Pressure Compensator Adjustment Spool Drain Plug 361 Maximum Volume Stop

  14. P-LNN • We offer a low pressure version of the PVWJ pump. The designator for this control is P-LNN. This control will allow the pump to go to a minimum compensator setting of approximately 150 psi. The pumps maximum pressure limit is 1500 psi.

  15. P-1NN and P-LNN Control Stability Orifice Compensator spool

  16. P-1NN or P-LNN Port Locations Compensator Inlet Compensator Spool Drain Control Spring Drain Compensator Spring Drain

  17. Changes in the Control • The PVWJ-P-1 pressure compensating control is functionally the same as the previous PVWH-CN control with improvements to the control to; increase stability, reduce control generated noise, and ease of field adjustment. Some of these changes are: • New dampened compensator spool

  18. PVWJ Control Changes • New Compensator Spool PVWJ PVWH

  19. Changes in the Control • The PVWJ-P-1 pressure compensating control is functionally the same as the previous PVWH-CN control with improvements to the control to; increase stability, reduce control generated noise, and ease of field adjustment. Some of these changes are: • New dampened compensator spool • Dual compensator springs

  20. PVWJ Control Changes • Dual Compensator Springs

  21. P-1NN or P-LNN New Spring Seat Dual Compensator Springs New Dampened Compensator Spool

  22. Changes in the Control • The PVWJ-P-1 pressure compensating control is functionally the same as the previous PVWH-CN control with improvements to the control to; increase stability, reduce control generated noise, and ease of field adjustment. Some of these changes are: • New dampened compensator spool • Dual compensator springs • New compensator adjustment assembly

  23. PVWJ Control Changes • New Adjustment Assembly • Shims are now used to increase the maximum pressure, instead of reducing pressure as in the PVWH series Spring Seat and O-ring Seal The screw that holds the adjustment shims, screws in to the pressure adjusting screw.

  24. PVWH vs. PVWJ PVWJ PVWH

  25. Changes in the Control • The PVWJ-P-1 pressure compensating control is functionally the same as the previous PVWH-CN control with improvements to the control to; increase stability, reduce control generated noise, and ease of field adjustment. Some of these changes are: • New dampened compensator spool • Dual compensator springs • New compensator adjustment assembly • New control housing • NO GASKETS!!

  26. PVWJ • As you can see in the photo on the right, the pump housing has been machined to accept an o-ring to seal the case. • The compensator inlet o-ring has been relocated to pump housing

  27. PVWJ Control Orifices • Standard Control Stability Orifice Sizes • PVWJ-011/014/022 .040” (1,016 mm) • PVWJ-025/034/046 .040” (1,016 mm) • PVWJ-064/076/098/130 .050” (1,27 mm) • All standard orifices are drilled 10-24 X ¼” hollow hex set screws.

  28. Control Piston Orifice

  29. P-1NN/F, and P-LNN/F

  30. P-1NN/F, and P-LNN/F RP1 Port Load Sense Port Max. Volume Stop

  31. P-1NN/FNN, or P-LNN/FNN

  32. P-1NN/FNN What’s Missing? Compensator Inlet Compensator Spring Drain

  33. P-1NN/FNN What’s Missing? Besides the control piston! Compensator Inlet Compensator Spring Drain

  34. P-1NN/FNN What’s Missing? Compensator Inlet Compensator Spring Drain The spool drain!

  35. P-1NN/F and P-LNN/F • In all P-1NN/F, P-LNN/F, P-C**, and P-K** controls the spool drains are not drilled. P-1NN P-1NN/F

  36. P-1NN/FNN vs P-1NN/FSN • The pictures to the right show an “A” frame PVWJ without a maximum volume stop, and a P-1NN/FSN control with a maximum stop. • Unlike the PVWH, the PVWJ incorporates a transition block which allows the LS module to be rotated 90° to facilitate a maximum stop. This eliminates the need to relocate the module to the top of the control housing. Adjustable LS Option Fixed LS Option

  37. P-1NN/F • Options for the PVWJ load sense modules: • F = Fixed D P 170 psi • J = Adjustable D P 100-220 psi • K = Adjustable D P225-350 psi Fixed module is shown

  38. PVWJ Pumps w/P-1NN/F-ADJ* Control .030” orifice System Header Remote Relief Valve Remote Compensating PVWJ Pumps using Adjustable Load Sense Controls

  39. Load Sense Control • Primarily used on mobile equipment to help minimize wasted horsepower. • Allows thepump maintain a constant flow regardless of pressure, within ± 5%. • Helps minimize heat generated in the system. • By maintaining a constant DP across a customer supplied restriction, i.e. flow control, proportional valve, etc.

  40. 34 gpm 1500 psi 3000 psi 15 gpm HP Required @ 34 GPM = 35.00 HP Required @ 15 GPM = 70.00 34 gpm Why is the horsepower double @ 15 GPM 2 Speed Motor Circuit - Fixed Volume

  41. 34 gpm 1500 psi 3200 psi 15 gpm HP Required @ 34 GPM = 35.00 hp HP Required @ 15 GPM = 31.00 hp 34 gpm HP Saving Over Fixed Pump @ 15 GPM = 39.00 hp 34 GPM 3000 psi 2 Speed Motor Circuit - Pressure Compensated

  42. 34 gpm 1500 psi 3200 psi 1500 psi Working Pressure 15 gpm 1670 PSI 3000 psi L P 170 .020 Bleed Orifice HP HP Required @ 34 GPM = 35.00 hp HP Required @ 15 GPM = 18.00 hp 2 Speed Motor Circuit - Load Sense HP Savings L.S. vs. Fixed = 52.00 hp HP Savings L.S. vs. P Comp. = 14.00 hp

  43. Why Use a Load Sense over a Pressure Compensated Control? • Cost • Stability • Ability to remote compensate more than a single pump.

  44. P-C** or P-K** Soft Start

  45. P-C** or P-K** Soft Start

  46. P-K**

  47. P-K** Why is this control a P-K**?

  48. P-K** N.C. Two-Way Valve Why is this control a P-K**?

  49. PVG/PVV Controls