R900984301 Rexroth PGP2-2X/006 Internal Gear Pump

Product Overview

The R900984301 / PGP2-2X/006RA20VP2 is identified with the Bosch Rexroth PGP Series 2X fixed-displacement internal gear pump platform.

Bosch Rexroth defines PGP pumps as leak-gap-compensated internal gear pumps with fixed displacement. In the current official configurator, the PGP2 frame-size range identifies the 006 size with a geometric displacement of 6.5 cm³/rev and an operating pressure of 250 bar.

The official RE 10231 technical documentation for PGP Series 2X and 3X describes the platform as a fixed-displacement internal gear pump family designed for low operating noise, low flow pulsation, high efficiency at low viscosity through sealing-gap compensation, long service life and excellent suction characteristics.

The PGP2 range is based on BG2 frame size and includes 006, 008, 011, 013 and 016 displacement classes. The 006 configuration is the smallest listed PGP2 size and provides 6.5 cm³/rev geometric displacement.

For the provided configuration, R can be reliably associated with clockwise rotation, while 20 identifies the DIN 3901/3902 square-flange port family in the Rexroth PGP coding system. However, the complete legacy string RA20VP2 does not map character-for-character to the currently published RE 10231 ordering-code structure, so the undocumented legacy fields should be verified against the actual nameplate or historical Rexroth documentation rather than guessed.(livhaven.com)

Technical Specifications

• Material Number: R900984301
• Model: PGP2-2X/006RA20VP2
• Brand: Bosch Rexroth
• Series: PGP Series 2X
• Pump Type: Fixed-displacement internal gear pump
• Frame Size: BG2
• Nominal Size: 006
• Geometric Displacement: 6.5 cm³/rev
• Official PGP2-006 Operating Pressure: 250 bar
• Maximum Pressure of the PGP 2X/3X Product Family: 350 bar; this is a family-level maximum and must not automatically be applied to the PGP2-006 configuration.
• Control: Fixed displacement, mechanical
• Rotation: R = right / clockwise configuration
• Port Connection Family: 20 = square connection according to DIN 3901 / DIN 3902
• Shaft: PGP2 documentation provides parallel keyed and SAE J744 splined shaft options; the legacy A field in the supplied code should be verified rather than inferred.
• Seal: Rexroth’s PGP configurator identifies V as an FKM shaft seal ring configuration; the complete legacy VP2 string should be verified against the original product record.
• Weight: Not stated because a verified model-specific official value was not found.
• Maximum Speed: Not stated as a confirmed value because the currently accessible official sources do not provide a configuration-specific speed limit for the legacy R900984301 code.
• Displacement Class: 6.5 cm³/rev

Configuration Notes

For the supplied code:

PGP2-2X/006RA20VP2

the following elements can be supported by the available Rexroth documentation:

• PGP — PGP internal gear pump
• 2 — BG2 frame size
• 2X — Series 20–29
• 006 — 6.5 cm³/rev displacement class
• R — clockwise rotation
• 20 — DIN 3901/3902 square port connection
• V — FKM shaft-seal family

The legacy fields A and P2 are not reproduced directly in the current public RE 10231 ordering-code legend. They should therefore be validated against the actual pump nameplate, historical documentation or the original Rexroth material record.

Key Technical Advantages

1. Leak-Gap Compensation

The PGP platform uses pressure-assisted sealing-gap compensation to control internal leakage paths. This is a central feature of Rexroth’s internal gear pump architecture and supports stable volumetric performance as operating pressure changes.

2. Compact 6.5 cm³/rev Displacement

The PGP2-006 configuration provides 6.5 cm³/rev geometric displacement, making it appropriate for hydraulic circuits requiring relatively low flow with a high-pressure capability.

At 1500 rpm, the theoretical displacement flow is:

6.5 × 1500 / 1000 = 9.75 L/min

This is a theoretical flow value; actual delivery depends on volumetric efficiency, operating pressure, viscosity and temperature.

3. 250 Bar Operating Pressure

Bosch Rexroth’s current official PGP configurator specifies 250 bar operating pressure for the PGP2-006 configuration. This should be used as the primary engineering pressure figure for this size rather than the 350 bar family maximum.

4. Low Noise and Low Flow Pulsation

The RE 10231 documentation identifies low operating noise and low flow pulsation as key PGP design characteristics. This is particularly beneficial in industrial machines where hydraulic noise and pressure ripple can affect both operator comfort and system stability.

5. Efficient Operation Across a Wide Viscosity Range

Rexroth specifically highlights high efficiency at low viscosity because of sealing-gap compensation. This makes the PGP concept suitable for hydraulic systems exposed to changing oil temperatures and viscosity.

6. Long-Service-Life Internal Architecture

Rexroth associates the combination of slide bearings and sealing-gap compensation with extended service life. The architecture is intended for demanding industrial duty cycles where stable performance is required over long operating periods.

Application Areas

Typical applications include:

• Industrial hydraulic power units
• Compact hydraulic stations
• Machine tools
• Forming and processing machinery
• Hydraulic clamping systems
• Industrial automation equipment
• High-pressure auxiliary hydraulic circuits
• Mobile equipment auxiliary hydraulics
• Hydraulic lubrication circuits
• Continuous-duty industrial hydraulic systems

Rexroth’s RE 10231 documentation specifically identifies high-pressure drives such as trimming presses and describes PGP pumps as suitable for combinations with PGH, PGF, vane and axial-piston pumps.

Expert Maintenance Tips

1. Prioritize Suction Conditions

Although Rexroth identifies excellent suction characteristics as a PGP advantage, suction-line design remains critical. Pipe sizing, filter pressure drop, oil viscosity and reservoir level all affect pump inlet conditions.

2. Provide External Pressure Protection

The PGP pump itself does not contain a device for limiting the maximum permissible operating pressure. Rexroth requires pressure safeguarding to be provided on the system side using properly sized pressure-relief or pump-safety equipment.

3. Size Pressure Lines for Maximum Flow

Pressure pipes, hoses and fittings must have sufficient burst resistance, and hydraulic line cross-sections should be selected according to maximum flow to avoid unnecessary back-pressure and pump loading.

4. Verify Rotation Before Start-Up

The R code corresponds to clockwise rotation. Rotation should be verified during low-load commissioning before the pump is exposed to the full system pressure.

5. Confirm Legacy Configuration Before Replacement

For R900984301 / PGP2-2X/006RA20VP2, do not order a replacement based only on “PGP2-006”. The complete mechanical configuration must be verified, including:

displacement + rotation + shaft + flange + port connection + seal + mounting interface.

This is particularly important because the legacy RA20VP2 coding does not map one-to-one onto the currently published Rexroth RE 10231 ordering-code legend.