Oilgear PVWC Hydraulic Pump 

Features and benefits of the Oilgear PVWC Pump

1.Large selection of controls.

  • Several types of mechanical, hydraulic andelectrohydraulic servo valve controls are available.
  • Allow cushioned “across-center” delivery reversal.
  • Field interchangeability without disconnectingpump from main drive or system piping.
  • Neutral “by-pass” types available.

2. Cylinder carried in polymerous journal bearing

  • Provides longer bearing life
  • Permits compact design.
  • Allows operation with low viscosityor other special fluids.
  • Hardened cylinder surface running onhardened valve plate.

3. Hardened cylinder surface running on hardened valve plate

  • Greater resistance to contamination.
  • Provides longer life.
  • Allows operation with low viscosity or other special fluids.

4. Built-in supercharge and/or implement pump available.

  • Circuited to replenish piston pump in (closed loop) hydrostatic circuits. Provides for operation of implement or system accessories.

5. Thru-shaft and “plug-in” rear coupling availability (after removal of rear cover).

  • Allows multiple pump installation from a single driveshaft
  • Can be used to drive auxiliary devices.

6. Three capacities per single frame size.

  • Allows selection of capacity (speed) and pressure (torque) to most closely match the need while providing maximum control range sensitivity (gain).

7. Pistons with steel shoes and special faces for increased fluid retention, running on a hardened swashblock surface.

  • Provides a higher degree of contamination resistance.
  • Allows higher pressure operation.
  • Provides longer life.
  • Allows operation with low viscosity or other special fluids.

8. Special polymerous bearing between swashblock and saddle.

  • Permits consistent control reaction.
  • Eliminates troublesome yoke bearings.
  • Provides long life.

9. Sealed front shaft bearing.

  • Allows side loading.

10. SAE splined or keyed shaft.

  • For convenient coupling to your specific rotary power source.

11. Built-in supercharge pressure relief valve.

  • Maintains back pressure in the
    supercharge circuit to replenish
    piston pump.
  • Allows surplus return and/or
    supercharge volume to escape system.

12. Two cross-line check valves with (optional) high pressure relief valves

  • Automatically provide replenishing volume to low pressure side of circuit.
  • Protect high pressure pump drive and machine from overload damage if system pressure is exceeded.
  • Provide cushioned hydrodynamic or regenerative braking of driven hydraulic motor.

13. Built-in implement pressure relief valve available.

  • Protects implement (or accessory)
    circuit and supercharge pump from overload pressure and damage.

PLUS Not Shown in cross section photos

14. Totally enclosed.

  • Impervious to high pressure wash down.
  • Can be operated in hazardous locations, with totally enclosed drive motors.

15. Can be easily mounted in any position.

  • Easy to install.

16. “Tow” valve option.

  • Allows “free-wheeling” of hydraulic motor when being transported (towed).
Maximum Piston Pump DisplacementPUMP MODEL
PVWC 011

  • 0.66 cipr
  • 10.8 cc/rev
PVWC 014

  • 0.86 cipr
  • 14.1 cc/rev
PVWC 022

  • 1.35 cipr
  • 22.1cc/rev

Operating Pressure (see Note 1)

  • Rated Continuous
  • Maximum Intermittent (10% of duty)
  • Peak
–

  • 4000 psi (275 bar)
  • 4500 psi (310 bar)
  • 5000 psi (350 bar)
–

  • 4000 psi (275 bar)
  • 4500 psi (310 bar)
  • 5000 psi (350 bar)
–

  • 3000 psi (207 bar)
  • 3500 psi (240 bar)
  • 5000 psi (350 bar

Output Flow (see Note 2)

  • (@ 1800 rpm & Rated Cont Pressure)
–

  • 4.1 gpm (15.5 lpm)
–

  • 5.4 gpm (20.4 lpm)
–

  • 8.5 gpm (32.2 lpm)
Input Shaft Speed

  • Minimum
  • Continuous
  • Intermittent

–

  • 600 rpm
  • 3600 rpm
  • 4000 rpm

–

  • 600 rpm
  • 3600 rpm
  • 4000 rpm

–

  • 600 rpm
  • 3600 rpm
  • 4000 rpm
Charge Pressure (@ 1800 rpm)

  • Nominal
  • Minimum

–

  • 75 psi (5 bar)
  • 30 psi (2 bar)

–

  • 75 psi (5 bar)
  • 30 psi (2 bar)

–

  • 75 psi (5 bar)
  • 30 psi (2 bar)
Case Pressure

  • Maximum Continuous
  • Maximum Intermittent

–

  • 15 psi (1 bar)
  • 100 psi (7 bar)

–

  • 15 psi (1 bar)
  • 100 psi (7 bar)

–

  • 15 psi (1 bar)
  • 100 psi (7 bar)
Hydraulic Fluid Temp (@ pump inlet)

  • Minimum
  • Maximum

–

  • -40° F (-40° C)
  • 200° F (95° C)

–

  • -40° F (-40° C)
  • 200° F (95° C)

–

  • -40° F (-40° C)
  • 200° F (95° C)
Charge Pump Displacement

(Optional)

.425 cipr (7 cc/rev)

.64 cipr (10.5 cc/rev)

Operating Pressure

  • Rated Continuous
  • Maximum Intermittent (10% of duty)
–

  • 1000 psi (69 bar)
  • 1450 psi (100 bar)

Note 1:

  • Running Piston Pumps above pressures indicated will shorten the pump’s life.
  • To avoid damage, supercharge flow must be continuously supplied to the piston pump

Note 2:

  • Output flow based on ISO 46 hydraulic fluid at 125° F.

Pump Mount

(all displacements)

SAE “A” 2-bolt

SAE “B” 2-bolt

Input Shaft Options

(all displacements)

  • 7/8” Keyed
  • SAE A Spline (9 tooth, 16/32)
  • SAE B Spline (13 tooth, 16/32)
  • 11 tooth, 16/32 Spline

Port Type

(all displacements)

#8 SAE Straight Thread (all connections except inlet port of

.64 cipr Charge Pump are #10 SAE Straight Thread)

Direction of Rotation

(all displacements)

Clockwise or Counterclockwise

Installation Position

(all displacements)

Horizontal or Vertical at any clocking

Tandem Mount

(all displacements)

SAE “A” 2-bolt

with SAE “A” Spline drive

High Pressure Relief Valve (Block number 16 of model code)

MODEL CODE DESIGNATION

NOMINAL SETTING

CRACKING PRESSURE
MinimumMaximum
101450 psi (100 bar)1378 psi (95 bar)1523 psi (105 bar)
142030 psi (140 bar)1929 psi (133 bar)2132 psi (147 bar)
172500 psi (175 bar)2410 psi (166 bar)2664 psi (184 bar)
192730 psi (188 bar)2610 psi (180 bar)2842 psi (196 bar)
213045 psi (210 bar)2893 psi (200 bar)3197 psi (220 bar)
253625 psi (250 bar)3444 psi (238 bar)3806 psi (262 bar)
284060 psi (280 bar)3857 psi (266 bar)4263 psi (294 bar)
355075 psi (350 bar)4821 psi (332 bar)5329 psi (368 bar)

Implement Pressure Relief Valve (Block number 17 of model code)

MODEL CODE DESIGNATIONNOMINAL SETTING

CRACKING PRESSURE

MinimumMaximum

J

E or F

K

L

725 psi (50 bar)

913 psi (63 bar)

1160 psi (80 bar)

1450 psi (100 bar)

689 psi (48 bar)

867 psi (60 bar)

1102 psi (76 bar)

1378 psi (95 bar)

761 psi (52 bar)

959 psi (66 bar)

1218 psi (84 bar)

1523 psi (105 bar)