PGP2-2X/006RE20VE4 Rexroth Gear Pump 250 Bar

Product Overview

The PGP2-2X/006RE20VE4 is a Bosch Rexroth PGP Series 2X fixed-displacement internal gear pump, with material number R900932129. It uses a leak-gap-compensated internal gear architecture designed for industrial hydraulic systems requiring high pressure capability, low operating noise, low flow pulsation and long service life.

For the PGP2-006 configuration, Rexroth specifies a geometric displacement of 6.5 cm³/rev and a maximum continuous outlet pressure of 250 bar. The pump can reach 315 bar for up to 6 seconds, limited to 15% of the duty cycle, or 350 bar for up to 1 second, limited to 10% of the duty cycle. These pressure levels must not be treated as equivalent to the continuous operating rating.

The requested configuration uses a cylindrical Ø20 mm keyed shaft with through-drive, a DIN 6885 B6 × 6 × 25 key, an ISO 3019-2 80B4SW four-hole mounting flange, and a DIN 3901/3902 square port connection. The seal configuration is FKM.

For replacement projects, the complete ordering code should be matched rather than selecting a pump only by displacement. Our replacement process focuses on in-place dimensional and functional interchangeability, followed by 100% simulated operating-condition testing for pressure, flow, rotation, leakage and operating stability.

Technical Specifications

• Model: PGP2-2X/006RE20VE4
• Material Number: R900932129
• Brand: Bosch Rexroth
• Series: PGP Series 2X
• Pump Type: Fixed-displacement internal gear pump
• Frame Size: BG2
• Series: 2X
• Nominal Size: 006
• Geometric Displacement: 6.5 cm³/rev
• Maximum Continuous Pressure: 250 bar
• Maximum Intermittent Pressure: 315 bar, max. 6 s, ≤15% duty cycle
• Maximum Peak Pressure: 350 bar, max. 1 s, ≤10% duty cycle
• Minimum Speed: 600 rpm
• Maximum Speed: 1800 rpm
• Reference Flow: 9.4 L/min at 1450 rpm, 10 bar and 30 mm²/s
• Control Method: Fixed displacement, mechanical
• Rotation: Right / Clockwise
• Drive Shaft: Ø20 mm cylindrical keyed shaft with DIN 6885 key
• Shaft Key: B6 × 6 × 25
• Drive Configuration: Keyed shaft with through-drive
• Mounting Flange: 80B4SW, 4-hole flange according to ISO 3019-2
• Line Connection: Square flange connection with metric mounting thread, code 20
• Suction Port Reference: Ø20 mm, TK Ø40 mm
• Pressure Port Reference: Ø6 mm, TK Ø35 mm
• Seal: FKM
• Housing: Aluminium
• Ring Gear / Pinion Shaft: Steel
• Slide Bearings: Copper-tin with steel back
• Segment Assembly: Brass alloy; sealing rolls in plastic
• Weight: Approx. 3.64 kg
• Mounting: Flange mounting
• Permissible Absolute Inlet Pressure: 0.8–2 bar
• Hydraulic Fluids: HLP and HEES fluids listed in the Rexroth documentation
• Maximum Input Torque: 140 Nm for E shaft configuration
• Maximum Output Torque: 70 Nm

Ordering Code Interpretation

PGP2-2X/006RE20VE4

• PGP — Internal gear pump
• 2 — BG2 frame size
• 2X — Series 20–29
• 006 — 6.5 cm³/rev displacement class
• R — Right / clockwise rotation
• E — Cylindrical keyed shaft with through-drive
• 20 — Square flange connection with metric mounting thread
• V — FKM shaft seal
• E4 — Four-hole mounting flange according to ISO 3019-2 / VDMA 24560

These ordering-code elements correspond to the Rexroth PGP technical documentation.

Key Technical Advantages

1. Leak-Gap Compensation

The PGP architecture uses leak-gap compensation to minimize internal axial leakage clearances. The pressure-compensation principle helps maintain hydraulic sealing between rotating and stationary components as system pressure changes.

2. Compact 6.5 cm³/rev High-Pressure Configuration

The PGP2-006 offers 6.5 cm³/rev displacement while maintaining a 250 bar continuous pressure rating. This combination is well suited to compact high-pressure auxiliary circuits and industrial hydraulic power units.

At 1450 rpm, the theoretical geometric flow is:

6.5 × 1450 / 1000 = 9.425 L/min

This closely matches the published 9.4 L/min reference flow at 1450 rpm, 10 bar and 30 mm²/s.

3. 250 Bar Continuous Operation

The official PGP2-006 rating is 250 bar maximum continuous pressure. This should be the primary pressure reference for continuous-duty hydraulic-system design.

4. 350 Bar Peak Capability with Strict Duty Limits

The PGP2-006 may reach 350 bar for a maximum of 1 second and no more than 10% of the duty cycle. The intermediate 315 bar rating is limited to 6 seconds and 15% of the duty cycle.

5. Low Noise and Low Flow Pulsation

Rexroth identifies low operating noise and low flow pulsation as key PGP-series characteristics. The internal gear arrangement and gap-compensation design contribute to smooth fluid delivery.

6. Engineered Multi-Material Construction

The pump combines an aluminium housing, steel gear components, copper-tin sliding bearings with steel backs, and brass-alloy segment components. Each material is selected for a different mechanical or tribological requirement within the pump.

7. Through-Drive for Multi-Pump Systems

The PGP platform supports through-drive configurations and can be combined with PGH and PGF internal gear pumps as well as vane and axial-piston pumps. This makes the platform suitable for integrated multi-pump hydraulic power units.

Application Areas

Typical applications include:

• Industrial hydraulic power units
• Trimming presses
• Machine-building hydraulic systems
• Compact industrial hydraulic stations
• Hydraulic clamping systems
• Forming and processing machinery
• Multi-pump power units
• High-pressure auxiliary hydraulic circuits
• Continuous-duty industrial hydraulic systems
• Low-noise hydraulic equipment

Rexroth’s PGP documentation identifies high-pressure drives and applications such as trimming presses and allows combination with other hydraulic pump technologies.

Expert Maintenance Tips

1. Install External Pressure Protection

Rexroth explicitly states that the PGP pump does not contain an integrated device to prevent operation outside the permissible technical data. External system-side pressure protection is therefore required.

2. Respect the Three Pressure Levels

Use:

250 bar — continuous

315 bar — maximum 6 s, ≤15% duty cycle

350 bar — maximum 1 s, ≤10% duty cycle

for engineering calculations and pressure-control design.

3. Protect the Inlet Side

The permitted absolute inlet pressure is 0.8–2 bar. Avoid excessive suction-line losses, clogged filters and restrictive inlet plumbing.

4. Check Shaft and Coupling Loads

The PGP2-2X/006RE20VE4 uses a Ø20 mm keyed shaft with through-drive and has a published 140 Nm maximum input torque for the E-shaft configuration. External radial and axial loads should not be transferred directly to the pump shaft without prior engineering verification.

5. Verify Combined-Pump Torque

When using the through-drive for additional pumps, the total downstream input torque must remain within the allowable input torque of the first pump. Rexroth explicitly requires this check for combined pump arrangements.

6. Maintain Hydraulic Fluid Cleanliness

Because the PGP relies on tight internal sealing gaps and sliding bearings, contamination control is essential. Filter condition, oil cleanliness and wear-particle trends should be included in preventive maintenance.

7. Match the Complete Configuration During Replacement

For replacement, verify:

PGP2-2X/006RE20VE4

together with:

6.5 cm³/rev + clockwise rotation + keyed E shaft + DIN square connection + FKM seal + E4 four-hole mounting flange.

This complete-code approach provides the proper basis for in-place interchangeability.