Product Overview
The PGH5-30/125RE11VE4 and PGF3-2X/032RHOV7VE4 are high-performance internal gear pumps from Bosch Rexroth, featuring gap-compensated fixed-displacement design. Bosch Rexroth is a global leader in drive and control technologies. The PGH and PGF series are renowned for high efficiency, low noise, low pulsation, and long service life, widely used in industrial hydraulics, die casting, injection molding, machine tools, and mobile equipment.
The PGH5-30/125RE11VE4 belongs to the PGH series frame size 5, component series 3X, with a maximum operating pressure of 350 bar and maximum displacement of 250 cm³. The pump features gap-compensated internal gear pump design with fixed displacement, comprising a mounting flange, housing, cover with through-drive, pinion shaft, internal gear, plain bearings, axial washers, and radial compensation elements (segment, segment support, seal rolls).
The PGF3-2X/032RHOV7VE4 belongs to the PGF series frame size 3, component series 2X, with a maximum operating pressure of 250 bar and maximum displacement of 40.5 cm³. PGF series hydraulic pumps are leak-gap-compensated internal gear pumps with fixed displacement, suitable for drives in the medium-output and medium-pressure range in industrial applications, and for endurant drives at high operating pressure in mobile applications.
Model Code Breakdown (based on Bosch Rexroth PGH/PGF series designation rules):
PGH5-30/125RE11VE4:
PGH: Internal gear pump
5: Frame size 5
30: Series 30 (component series 3X)
125: Nominal displacement – 125 cm³/rev
R: Rotation direction – Clockwise (viewed from shaft end)
E: Shaft end – Cylindrical with key (ISO 3019-2)
11: Mounting flange and port specification
V: Seal material – FKM
E4: Mounting flange type – 4-hole flange (ISO 3019-2)
PGF3-2X/032RHOV7VE4:
PGF: Internal gear pump (medium-pressure pump)
3: Frame size 3
-2X: Component series 2X
032: Nominal displacement – 32.5 cm³/rev
R: Rotation direction – Clockwise
H: Shaft end (special configuration)
O: Shaft end – Tapered 1:5
V: Seal material – FKM
7: Mounting flange and port specification
VE4: Additional configuration code
We specialize in the R&D and manufacturing of high-pressure pumps, motors, and valve groups. All PGH and PGF series models offer 100% direct interchangeability with original Bosch Rexroth pumps of the same model—no modification required. Every unit undergoes 100% simulated load testing before shipment, ensuring performance validation under real-world operating conditions.
Technical Specifications
PGH Series General Specifications:
Brand Series: Bosch Rexroth PGH Series
Pump Type: Gap-compensated internal gear pump (fixed displacement)
Body Material: Cast iron housing
Seal Material: FKM
Fluid Media: HLP mineral oil (DIN 51524 Part 2), HFC, etc.
Mounting Flange: ISO 3019-2 compliant
Rotation Direction: Clockwise (R designation)
Variable-Speed Drive Compatible: Yes
PGH5-30/125RE11VE4 Specifications:
Model: PGH5-30/125RE11VE4
Material Number: R901147125
Nominal Displacement: 125.30 cm³/rev
Maximum Operating Pressure: 350 bar
Maximum Flow Rate: 375 L/min
Flow Rate (@ 1450 rpm, 10 bar, 30 mm²/s): 179.8 L/min
Maximum Speed: 3000 rpm
Minimum Speed: 200 rpm
Rotation Direction: Clockwise (viewed from shaft end)
Shaft End: Cylindrical Ø40 mm with 12 mm keyway, ISO 3019-2
Mounting Flange: 4-bolt mounting, 200 mm bolt circle, 160 mm centering
Weight: Approx. 48 kg
PGF Series General Specifications:
Brand Series: Bosch Rexroth PGF Series
Pump Type: Leak-gap-compensated internal gear pump (fixed displacement)
Body Material: Aluminum alloy
Seal Material: FKM
Maximum Operating Pressure: 250 bar
Displacement Range: 1.7 to 40.5 cm³/rev
Mounting Flange: ISO 3019-1 / ISO 3019-2 compliant
PGF3-2X/032RHOV7VE4 Specifications:
Model: PGF3-2X/032RHOV7VE4
Nominal Displacement: 32.5 cm³/rev
Operating Pressure: 210 bar
Maximum Operating Pressure: 250 bar
Shaft End: Tapered 1:5
Rotation Direction: Clockwise (R designation)
Seal Material: FKM
Key Technical Advantages
1. Gap-Compensated Design – Maintains High Volumetric Efficiency Throughout Service Life
Both PGH and PGF series feature axial and radial gap compensation design. Axial compensation uses pressure fields to balance axial washers for perfect sealing with low mechanical losses. Radial compensation elements (segment, segment support, seal rolls) separate suction and pressure zones with automatic clearance adjustment. This design ensures consistently high volumetric efficiency throughout the entire operating life.
2. Involute Gear System – Low-Noise and Low-Pulsation Operation
The gear tooth system features involute tooth profiles with a large meshing length, effectively reducing flow and pressure pulsation. This design guarantees low-noise and low-pulsation operation.
3. Hydrodynamic and Hydrostatic Bearings – Stable Operation at Low Speeds and Viscosities
The pinion shaft is supported by hydrodynamically lubricated plain bearings, while the internal gear is hydrostatically mounted in the housing. The sealing gap compensation feature ensures stable operation even at low speeds and low viscosities.
4. Optimized for Variable-Speed Drives with Wide Speed Range
Both PGH and PGF series are optimized for variable-speed drives. The speed range covers 200 to 3000 rpm, allowing slow positioning or high-cycle duty. Excellent suction characteristics make them suitable for broad viscosity and speed ranges.
5. Flexible Modular Design – Supports Through-Drive and Multi-Pump Combinations
Both PGH and PGF series support through-drive capability and can be combined with other pumps from the same series or other series (PGF/PGH internal gear pumps, PV7 vane pumps, axial piston pumps) for multi-pump configurations. All frame sizes can be combined with each other.
Application Areas
PGH5-30/125RE11VE4 (Large Displacement, Frame Size 5, 350 bar) :
Die Casting Machines—injection and clamping hydraulic systems
Injection Molding Machines—clamping and injection hydraulic systems
Automated Presses—press hydraulic systems
Accumulator Charging Systems—accumulator charging operations
Foundry Machines—foundry industry hydraulic systems
Plastic Processing Machinery—extruders, molding machines hydraulic systems
PGF3-2X/032RHOV7VE4 (Medium Displacement, Frame Size 3, 250 bar) :
Machine Tools—hydraulic systems for machining centers, lathes
Industrial Hydraulic Systems—medium-output and medium-pressure industrial applications
Mobile Equipment—lifting devices, fans, spreaders
Endurant Drives—mobile applications requiring high operating pressure
Expert Maintenance Tips
Model Code Verification (verify each element) :
PGH series model codes contain critical information. Before selection and installation, confirm the following:
PGH: Internal gear pump.
Frame size (5) : Frame size 5.
Series (30) : Component series 3X.
Displacement (125) : Nominal displacement – 125 cm³/rev.
Rotation direction (R) : R = Clockwise (viewed from shaft end).
Shaft end (E) : E = Cylindrical with key (ISO 3019-2).
Flange specification (11) : Mounting flange and port specification.
Seal material (V) : FKM.
Mounting type (E4) : 4-hole mounting flange (ISO 3019-2).
PGF series model codes:
PGF: Internal gear pump (medium-pressure pump).
Frame size (3) : Frame size 3.
-2X: Component series 2X.
Displacement (032) : Nominal displacement – 32.5 cm³/rev.
Rotation direction (R) : Clockwise.
Shaft end (HO) : H = special configuration, O = Tapered 1:5.
Seal material (V) : FKM.
Verify Rotation Direction:
Confirm that the drive shaft rotation matches the direction code in the model – “R” indicates clockwise (viewed from shaft end). Incorrect rotation will prevent pressure build-up and may damage internal gears and bearings.
Mounting Flange and Drive Shaft Matching:
PGH5-30/125RE11VE4 features a cylindrical shaft Ø40 mm with 12 mm keyway and 4-bolt mounting (200 mm bolt circle, 160 mm centering) . PGF3-2X/032RHOV7VE4 features a tapered 1:5 shaft end. Verify that the equipment-side shaft type matches the pump configuration before installation.
Suction Line and Fluid Requirements:
PGH and PGF series recommend HLP mineral oil per DIN 51524 Part 2 or HFC hydraulic fluids. Ensure the suction line is properly sealed with no air leaks and the suction filter is not clogged. Viscosity should be maintained within the recommended range. Fluid temperature should be maintained within -15°C to +80°C. Recommended fluid cleanliness class: ISO 4406 20/18/15.
First-Start Priming Procedure:
After new pump installation or system overhaul, ensure the pump cavity is filled with oil before first start. Jog the pump at low speed and low pressure until the pump body is fully filled with oil and air is purged, then gradually increase to rated speed and working pressure. PGH and PGF series use plain bearings—running the pump dry will cause irreversible damage to bearings and gears.
Preventive Maintenance:
To ensure long-term reliable operation, it is recommended to have seals replaced by an authorized Bosch Rexroth service company after no more than 5 years of operation. Plastic components of drive couplings should be replaced regularly, no later than after 5 years.
