PGH4-30/032RE11VU2 Rexroth Internal Gear Pump High Pressure

Product Overview

The PGH4-30/032RE11VU2 (and PGH5-3X/080RR11VU2) is a fixed-displacement high-pressure internal gear pump from the Bosch Rexroth PGH series. Featuring gap compensation, it delivers low operating noise, minimal flow pulsation and high efficiency even at low speeds and viscosities. Maximum operating pressure reaches 315–350 bar with displacements from 20 to 250 cm³/rev. The pump offers direct bolt-on interchangeability with OEM units and undergoes 100% simulated duty testing for reliable performance in industrial hydraulic systems requiring high-pressure, low-noise internal gear pumps.

Technical Specifications 

• Models: PGH4-30/032RE11VU2 (frame size 4); PGH5-3X/080RR11VU2 (frame size 5)
• Pump type: Fixed displacement internal gear pump (gap-compensated)
• Displacement (PGH4-032): 32.70 cm³/rev
• Displacement (PGH5-080): 81.40 cm³/rev
• Maximum operating pressure: Up to 315–350 bar (depending on series and conditions)
• Minimum speed: Approx. 200–400 rpm
• Maximum speed: 3000 rpm (frame size 4)
• Weight (PGH4-032 example): Approx. 15 kg
• Rotation: R = Clockwise (viewed from shaft end)
• Mounting flange example: U2 = SAE 2-hole flange
• Seals: V = FKM seals
• Other: Low noise, low pulsation; suitable for wide viscosity and speed ranges; combinable in multiple units

Key Technical Advantages

1. True drop-in interchangeability: Manufactured to OEM dimensional and porting standards for bolt-on replacement without modifications.
2. Gap compensation for high efficiency: Maintains high volumetric efficiency even at low speeds and viscosities, minimizing internal leakage.
3. Low noise and low pulsation: Optimized design ensures quiet, smooth operation with minimal pressure pulsation.
4. Wide operating range: Supports broad speed and viscosity ranges with maximum pressures up to 350 bar and robust construction.
5. 100% simulated duty testing: Full pressure, flow, noise and endurance verification before shipment ensures ready-to-install reliability.

Application Areas

• Industrial hydraulic power units and machine tools
• Injection molding machines, presses and die-casting equipment
• Elevators and material handling systems
• Open-circuit systems requiring high-pressure, low-noise internal gear pumps
• Multiple-pump combinations

Expert Maintenance Tips

• Confirm clockwise rotation (R) and flange/port compatibility before installation; use recommended hydraulic fluid and maintain cleanliness (ISO 20/18/15).
• Start at low speed unloaded; check for leaks and noise. Ensure minimum suction pressure requirements (approx. 0.8 bar absolute) are met.
• Regularly inspect seals and bearings; keep suction lines unrestricted to prevent cavitation.
• Keep oil temperature and viscosity within recommended ranges; avoid over-pressure operation.
• For special codes or multiple-pump configurations, verify the complete order code and consult technical support.