1. Oilgear Pump Controls
PVWJ, PVG, and PVV

2. 3-way Style (PVWW/PVWJ)
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. 3-way Style (PVWW, PVWJ) 4-way Style (PVG, PVV) Pump Controls
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 Controls PVWJ
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. Control Stability Orifice
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. Spring Seat and O-ring Seal
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/ ” (1,016 mm)
PVWJ-025/034/ ” (1,016 mm)
PVWJ-064/076/098/ ” (1,27 mm)
All standard orifices are drilled 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. Compensator Spring Drain
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. Compensator Spring Drain
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 psi
K = Adjustable D P psi
Fixed module is shown

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

40. Primarily used on mobile equipment to help minimize wasted horsepower.
Load Sense Control
Primarily used on mobile equipment to help minimize wasted horsepower.
Allows the pump 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.

41. 2 Speed Motor Circuit - Fixed Volume
34 gpm
1500 psi
3000 psi
15 gpm
HP 34 GPM = 35.00
HP 15 GPM = 70.00
34 gpm
Why is the horsepower 15 GPM
2 Speed Motor Circuit - Fixed Volume

42. 2 Speed Motor Circuit - Pressure Compensated
34 gpm
1500 psi
3200 psi
15 gpm
HP 34 GPM = hp
HP 15 GPM = hp
34 gpm
HP Saving Over Fixed 15 GPM = hp
34 GPM
3000 psi
2 Speed Motor Circuit - Pressure Compensated

43. 2 Speed Motor Circuit - Load Sense
34 gpm
1500 psi
3200 psi
1500 psi Working Pressure
15 gpm
1670 PSI
3000 psi
L P 170
.020 Bleed Orifice HP
HP 34 GPM = hp
HP 15 GPM = hp
2 Speed Motor Circuit - Load Sense
HP Savings L.S. vs. Fixed = hp
HP Savings L.S. vs. P Comp. = hp

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

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

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

47. P-K**

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

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

50. PVG/PVV Controls

51. Pumps that use a 4-way style control
4-way Style Controls
Pumps that use a 4-way style control

52. Pumps that use a 4-way style control
4-way Style Controls
Pumps that use a 4-way style control
PVG

53. Pumps that use a 4-way style control
4-way Style Controls
Pumps that use a 4-way style control
PVG
PVV

54. P-1NN Single Pressure Compensator P-2NN Dual Pressure Compensator
4-way Style Controls
P-1NN Single Pressure Compensator
P-2NN Dual Pressure Compensator
P-A** N.O Proportional Pressure Compensator
P-B** N.C. Proportional pressure Compensator
P-C** Single Pressure w/ No Load Starting

55. P-1NN/F Single Pressure w/ Load Sense
4-way Style Controls
P-1NN/F Single Pressure w/ Load Sense
P-1NN/H Single Pressure w/ Horsepower Limiting
P-1NN/G Single Pressure w/ HP Limiting & Load Sense
P-1NN/K Single Pressure w/ Load Sense Plus

56. P-1NN 4-way Pressure Control
Features included in these style of controls
Easily Remotely Compensated
Critical Orifice Ports tapped for orifice plugs.

57. P-1NN Compensator
Remote Port 1
GPA
OP3
OP4
OP14
OP2
OP6

58. P-1NN 4-way Pressure Control
Typically this control is used where very fast response is required.
Response times of milliseconds (PVG)
Set works in sawmills

59. Full Stroke

60. Compensated “Slip Stroke”

61. Orifice Locations
OP-6
OP-5
OP-1
OP-2
OP-14
OP-3
OP-4
OP-10

62. OP 14
OP 1

63. Remote Compensating a Single PVG

64. P-1NN/F Load Sense Control
Customer Supplied
OP2
OP14

65. Remote Compensating Multiple 4 way Style Pump Controls
To System

66. P-1NN/F Load Sense Control

67. P-1NN/F Load Sense Plus LS OP15 Customer Supplied A GPA RP1 OP8 OP3B

68. Compensator Adjustment
Stand-by Adjustment
Delta P Adjustment

69. P-2NN Dual Pressure Control

70. High Pressure Adjustment
P-2NN Compensator - Full Stroke
High Pressure Adjustment
Solenoid Selector
Low Pressure Adjustment

71. P-C NN Soft Start Control

72. Unloading Solenoid Valve

73. Thank you for buying Oilgear Products