PVG PUMPS

PVG Pumps Currently 5 Displacements – 048 ml/rev (2.93 in ³) – 065 ml/rev (3.94 in³) – 075 ml/rev (4.60 in ³ ) – 100 ml/rev (6.00 in ³ ) – 130 ml/rev (7.94 in ³ ) 2 Frame Sizes –SAE “B” and “C” B Frame has a combination 2 or 4 bolt mount C Frame only available with 2 bolt mount

PVG Pumps Continuous Operating Pressures –from 3,750 to 5000 psi, (depending on displacement) Operating Speeds –from 600 to 2,700 rpm (depending on displacement)

PVG Features Large Sealed Outboard Shaft Bearing –Enables easy maintenance of shaft, bearing, and shaft seal. –Allows for quick conversions, ie; keyed to splined –Allows for operation on special fluids –Capable of being belt driven Cylinder Barrel is Supported by a Hydrodynamic Bearing –Allows operation special fluids –Provides for an Infinite Bearing Life –Provides a compact design

PVG Features SAE - “Keyed” or “Splined Shafts” –S = Splined “B-B” or “C-C” –K = Splined “B” or “C” –Y = Long Keyed –Z = Short Keyed Special Polymerous Saddle Bearings –Allows operation on special fluids –Permits constant control reaction –Eliminates troublesome trunion bearing and covers –Provides long life

PVG Features Steel Piston Shoes with specially treated faces –Increased fluid retention –High pressure operation with longer life –High degree of contamination resistance ISO Classification 21/19/16 –Allows for operation on special fluids Patented Pressure Lubricated Swashblock –Provides constant lubrication to swashblock bearings for high pressure, high cycle applications

PVG Features Hard on Hard Running Surfaces –All running surfaces hardened to a Rockwell “C” of –Provides greater contamination resistance because surfaces are file hard –Provides longer life –Allows operation on special fluids Quiet Valve Plate Design (Standard) – dBA (depending on pump size, rpm, and pressure)

PVG Features 3 Valve Plate Styles – Rear Ported – Side Ported (top and bottom) non thru shaft – Side Ported (top and bottom) thru shaft Close Coupled Dual Pump Mounting –B frame to “AA”, or “A”, or “B” –C frame to “AA”, “A”, “B”, or “C”

PVG Features 4-way Parallel Style Compensator –Very fast compensator response milliseconds –The control is ported to enable tailoring of the control response to the system –Hardened running surfaces

PVG SPECIFICATIONS

PVG 048 Performance Curves

PVG 065 Performance Curves

PVG 075 Performance Curves

PVG 100 Performance Curves

PVG 130 Performance Curves

PVG 048 Noise Curves

PVG 065 Noise Curves

PVG 075 Noise Curves

PVG 100 Noise Curves

PVG 130 Noise Curves

PVG 048 Inlet Curves

PVG 065 Inlet Curves

PVG 075 Inlet Curves

PVG 100 Inlet Curves

PVG 130 Inlet Curves

Driveshaft Shaft Bearing Shaft Seal Saddle Bearings Swash Block Hydrodynamic Bearing Cylinder Barrel Shoe RetainerQuiet Valve Plate Fulcrum Ball & Spring Piston & Shoe Assembly

PVG Do’s and Don’ts The Do List –Fill the pump case prior to starting –Check alignment (.005 TIR) –Verify rotation –Connect drain line directly back to tank with no restrictions, full sized and separately –Use a fast acting spike relief valve –Back off pressure compensator and relief valve prior to initial start-up

PVG Do’s and Don’ts The Dreaded Don’t List or the “If you do it we won’t warranty it list” –Do not restrict the case drain line No filters (if you absolutely “gotta” have one, please install a 5 psi check valve in parallel with the filter) No in-line (Hedland style) flow meters, once again, (if you absolutely “gotta” have one, please install a full flow ball valve in parallel with the flow meter, and keep the ball valve open when not testing case leakage) No heat exchangers

PVG Do’s and Don’ts Do not restrict the case drain line continued –No other return or drain lines. If you have two pumps there should be two case drain lines run separately back to tank. –No inlet strainers or filters Can cause cavitation. Especially true as temperature and viscosity changes.

The Effects of Case Restriction Can cause piston shoes to lift off the swashblock –Maximum case differential pressure varies depending on rpm, it can be a high as 60 psi for a PVG at 1800 rpm. Vickers - 7 psi Rexroth - 7 psi Parker (PVP) - 5 psi Denison (P6&7) - 25 psi Oilgear (PVWH) - 10 psi –Shoe lift off will cause the shoes to roll, cold work the ball and socket area of the shoe causing the shoe skirt to fail. This will in a short period of time cause a catastrophic pump failure. NO WARRANTY!

Case Pressure Below Maximum Differential Piston Shoe Runs Flat on Swashblock

The Effects of Case Restriction Shoe Lift Off Can Also Cause –Breakthrough of the hardening on the swashblock causing extensive wear on the swashblock and shoe, as well as contaminating the reservoir and system. –Shaft seal leakage Maximum shaft seal pressure is 25 psi

NOTE; Gap Between Shoe and Swashblock Case Pressure Above Maximum Differential

PVG Do’s and Don’ts Improper Shaft Alignment –Can cause the pump not to build pressure, creates abnormal wear on the valve plate, hydrodynamic bearing, and cylinder barrel

NOTE: Cylinder Barrel not parallel to valve plate Side load

PVG Controls Pressure Controls –P-1NN Single Pressure Compensator –P-2** Dual Pressure Compensator –P-C** Soft Start Compensator –P-1NN/F Pressure Comp w/ Load Sensing –P-1NN/H Pressure Comp w Horsepower Limiting (c-frame units only) –P-1NN/G P Comp, LS, HP Limiting

PVG Controls Volume Controls –V-M20 Servo with electronic feedback –R Solenoid operated two position pump control

P-1NN Compensator

P-1NN/F Load Sense Control

Load Sense Module OP-4 OP-3 4-way Spool OP-2 OP-5 Load Sense Spool Load Sense Line Bias Spring Control Piston OP-6OP-1 Compensator Poppet Compensator Adjustment Screw LS Delta P Spring LS Adjustment Screw Flow Restriction OP-9 OP-14

Load Sense - Low Pressure Stand-by

Full Stroke Condition

Load Sensing - Dynamic Condition

Compensated - Static Condition

2 Speed Motor Circuit - Fixed Volume 34 GPM 15 GPM 1500 PSI Working Pressure 3000 PSI 34 GPM HP 34 GPM = HP 15 GPM = Why is the horsepower 15 GPM?

Variable Volume - Pressure Compensated 34 GPM 15 GPM 3200 PSI 3000 PSI HP 34 GPM = HP HP 15 GPM = HP HP 15 GPM = HP 1500 psi Working Pressure

Variable Volume - Load Sensed 34 GPM 15 GPM 3200 psi Delta P PSI 1500 psi Working Pressure 1670 PSI HP 34 GPM = HP HP 15 GPM = HP HP Savings L.S. vs. Fixed = HP HP Savings L.S. vs.. P Comp = HP

P-1NN/F Load Sense Plus

Load Sense Plus - Stand-by Delta P Adjustment Stand-by Adjustment Compensator Adjustment

Load Sense + Dynamic Condition Set 400 psi Set 170 psi 1570 psi If the working pressure is 1400 psi 1400 psi

P-2NN Dual Pressure Compensator

Low Pressure Adjustment Solenoid Selector High Pressure Adjustment OP-1 Low Pressure Poppet OP-4 OP-3 OP-2 4-way Compensator Spool High Pressure Poppet OP-14OP-5OP-6 Bias Spring OP-10 P-2NN Compensator - Full Stroke

P-2NN Compensator - Low Pressure

P-2NN Compensator - Full Stroke

P-2NN Compensator - High Pressure

P-CXX Soft Start Control

Full Stroke - High Pressure Unloading Solenoid Valve

P-CXX - Soft Start ControlUnloaded Unloading Solenoid Valve - Energized

P-CXX Soft Start Control Compensated High Pressure Unloading Solenoid Valve - De-energized

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