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Oilgear Pump Controls PVWJ, PVG, and PVV
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3-way Style (PVWW/PVWJ)
Pump Controls 3-way Style (PVWW/PVWJ) Typically used in circuits where fast response times are not necessary.
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3- way Control Circuit
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3- way Pressure vs Volume
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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.
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4- way Control Circuit OP-2
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4- way Pressure vs Volume
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PVWJ Controls
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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
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PVWJ P-1NN Control Access for lifting eye Pressure adj. Screw RP Port
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3-Way - P-1NN or P-LNN P-1NN or P-LNN CN Control CN Control
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Full Stroke Optional Minimum Volume Stop
Pressure Compensator Adjustment Spool Drain Plug 361 Maximum Volume Stop
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Zero “Slip Stroke” Optional Minimum Volume Stop
Pressure Compensator Adjustment Spool Drain Plug 361 Maximum Volume Stop
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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.
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Control Stability Orifice
P-1NN and P-LNN Control Stability Orifice Compensator spool
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P-1NN or P-LNN Port Locations
Compensator Inlet Compensator Spool Drain Control Spring Drain Compensator Spring Drain
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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
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PVWJ Control Changes New Compensator Spool PVWJ PVWH
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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
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PVWJ Control Changes Dual Compensator Springs
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P-1NN or P-LNN New Spring Seat Dual Compensator Springs
New Dampened Compensator Spool
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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
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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.
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PVWH vs. PVWJ PVWJ PVWH
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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!!
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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
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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.
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Control Piston Orifice
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P-1NN/F, and P-LNN/F
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P-1NN/F, and P-LNN/F RP1 Port Load Sense Port Max. Volume Stop
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P-1NN/FNN, or P-LNN/FNN
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Compensator Spring Drain
P-1NN/FNN What’s Missing? Compensator Inlet Compensator Spring Drain
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P-1NN/FNN What’s Missing? Besides the control piston!
Compensator Inlet Compensator Spring Drain
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Compensator Spring Drain
P-1NN/FNN What’s Missing? Compensator Inlet Compensator Spring Drain The spool drain!
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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
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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
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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
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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
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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.
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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
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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
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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
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Why Use a Load Sense over a Pressure Compensated Control?
Cost Stability Ability to remote compensate more than a single pump.
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P-C** or P-K** Soft Start
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P-C** or P-K** Soft Start
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P-K**
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Why is this control a P-K**?
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Why is this control a P-K**?
N.C. Two-Way Valve Why is this control a P-K**?
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PVG/PVV Controls
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Pumps that use a 4-way style control
4-way Style Controls Pumps that use a 4-way style control
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Pumps that use a 4-way style control
4-way Style Controls Pumps that use a 4-way style control PVG
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Pumps that use a 4-way style control
4-way Style Controls Pumps that use a 4-way style control PVG PVV
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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
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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
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P-1NN 4-way Pressure Control
Features included in these style of controls Easily Remotely Compensated Critical Orifice Ports tapped for orifice plugs.
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P-1NN Compensator Remote Port 1 GPA OP3 OP4 OP14 OP2 OP6
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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
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Full Stroke
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Compensated “Slip Stroke”
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Orifice Locations OP-6 OP-5 OP-1 OP-2 OP-14 OP-3 OP-4 OP-10
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OP 14 OP 1
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Remote Compensating a Single PVG
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P-1NN/F Load Sense Control
Customer Supplied OP2 OP14
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Remote Compensating Multiple 4 way Style Pump Controls
To System
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P-1NN/F Load Sense Control
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P-1NN/F Load Sense Plus LS OP15 Customer Supplied A GPA RP1 OP8 OP3
B
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Compensator Adjustment
Stand-by Adjustment Delta P Adjustment
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P-2NN Dual Pressure Control
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High Pressure Adjustment
P-2NN Compensator - Full Stroke High Pressure Adjustment Solenoid Selector Low Pressure Adjustment
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P-C NN Soft Start Control
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Unloading Solenoid Valve
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