AZPF-10-008RCB20MB AZPF-12-022RCB20KB Rexroth High Pressure Gear Pump

BOSCH REXROTH AZPF Series High-Performance External Gear Pump

Product Overview

The AZPF series is a fixed displacement external gear pump manufactured by Bosch Rexroth AG in Germany, belonging to the Platform F product line. Renowned for high pressure, high efficiency, and long service life, the series utilizes pressure-dependent gap sealing technology and high-precision manufacturing to minimize heat losses.

The AZPF series offers displacements from 4 to 28 cc/rev, with 12-tooth gears that effectively reduce flow pulsation and noise emissions. Slide bearings are designed to withstand high pressures and provide excellent dry-running characteristics, particularly at low speeds. Manufactured to international standards, the series offers excellent interchangeability with equivalent models from other major brands.

This page covers the following models: AZPF-10-008RCB20MB, AZPF-12-022RCB20KB, AZPF-10-011RCB20MB, and the full AZPF series range.

Technical Specifications (Bulleted List)

AZPF Series General Specifications (Platform F)

• Series: AZPF Series, Platform F

• Pump Type: External gear, fixed displacement

• Displacement Range: 4 – 28 cc/rev

• Max. Continuous Pressure: 250 bar

• Max. Intermittent Pressure: 280 bar

• Number of Gear Teeth: 12

• Bearing Type: Slide bearings

• Sealing Material: NBR (standard) / FKM (optional)

• Fluid Type: Mineral oil, HFC, HFD, HETG, HEPG, HEES

• Viscosity Range: 12–800 mm²/s (recommended 20–100 mm²/s)

• Temperature Range: -15°C to +80°C

AZPF-10-008RCB20MB

• Model Code: AZPF-10-008RCB20MB

• Material Number: 0510425009

• Displacement: 8.0 cc/rev

• Max. Continuous Pressure: 250 bar

• Max. Intermittent Pressure: 280 bar

• Max. Peak Pressure: 300 bar

• Max. Speed (at P2): 4,000 rpm

• Min. Speed (at P2, ν=25 mm²/s): 700 rpm

• Rotation: Clockwise (right-hand)

• Mounting Flange: Rectangular flange, Ø80 mm

• Mounting Thread: M6 (13 mm engagement depth)

• Port Type: Square flange ports

• Rear Cover: Without valve

• Sealing Material: NBR

• Weight: 3.3 kg

AZPF-12-022RCB20KB

• Model Code: AZPF-12-022RCB20KB

• Material Number: 0510725030

• Displacement: 22.5 cc/rev

• Max. Continuous Pressure: 180 bar

• Max. Intermittent Pressure: 210 bar

• Max. Peak Pressure: 230 bar

• Max. Speed: 2,500 rpm (at P2)

• Min. Speed (100–180 bar): 800 rpm

• Min. Speed (<100 bar): 500 rpm

• Rotation: Clockwise (right-hand)

• Max. Drive Shaft Torque: 110 Nm

• Mounting Flange: SAE J744 101-2, pilot Ø101.6 mm

• Drive Shaft: Tapered 1:5

• Port Type: Rectangular flange, ISO 8434-1

• Front Cover Material: Aluminum

• Rear Cover Material: Cast iron (standard)

• Sealing Material: NBR (housing) / FKM (shaft seal)

• Ambient Temperature (NBR): -30°C to +80°C

• Ambient Temperature (FKM): -20°C to +110°C

AZPF-10-011RCB20MB

• Model Code: AZPF-10-011RCB20MB

• Material Number: 0510525009

• Displacement: 11.0 cc/rev

• Max. Continuous Pressure: 250 bar

• Max. Intermittent Pressure: 280 bar

• Rotation: Clockwise (right-hand)

• Mounting Flange: Rectangular flange, Ø80 mm

• Sealing Material: NBR

• Fluid Type: Mineral oil

Key Technical Advantages

1. Pressure-Dependent Gap Sealing Technology

Pressure-dependent gap sealing technology applies operating pressure to movable slide bearing bushes, pressing them against the gear end faces for automatic axial clearance compensation. This design maintains optimal volumetric efficiency across varying operating pressures, significantly reducing internal leakage. Radial sealing between gear tooth tips and the housing is achieved through minimum clearances that adjust automatically with pressure changes.

2. Long-Life Slide Bearing Design

Slide bearings specifically engineered for high-pressure applications provide excellent dry-running characteristics, particularly at low speeds. The slide bearings effectively absorb radial gear loads, significantly extending product service life.

3. Low Noise and Low Pulsation Design

12-tooth gear design effectively reduces flow pulsation and noise emissions. Optimized tooth profiles combined with precision manufacturing deliver industry-leading noise performance. Available SILENCE and SILENCE PLUS low-noise variants address noise-sensitive applications.

4. Flexible Configuration Options

Platform F offers multiple displacement options (4–28 cc/rev), supporting various flanges, shafts, valve arrangements, and multiple pump combinations. The rear cover can integrate flow control valves or pressure relief valves to simplify piping. Available in Standard, High-Performance, SILENCE, and SILENCE PLUS versions.

5. Superior Environmental Adaptability

Sealing system offers both NBR and FKM options. NBR seals suit -30°C to +80°C ambient temperatures, while FKM seals withstand -20°C to +110°C high-temperature environments. Compatible with mineral oil and HFC, HFD, HETG, HEPG, HEES hydraulic fluids, adapting to diverse industrial scenarios.

Application Areas

• Industrial hydraulic systems: Machine tools, presses, injection molding machine power units

• Mobile hydraulic equipment: Forklifts, loaders, telescopic handlers

• Construction machinery: Excavators, skid steer loaders, road rollers

• Agricultural machinery: Tractor hydraulic systems, combine harvesters

• Material handling: Stackers, scissor lifts, platform elevators

• Power steering systems: Hydraulic fluid supply for power-assisted steering

• Lubrication and cooling systems: Centralized lubrication for large equipment

Expert Maintenance Tips

1. Model Code Interpretation: In AZPF-10-008RCB20MB, “10” indicates the series, “008” indicates 8 cc/rev displacement, “R” indicates right-hand rotation, “CB” indicates tapered shaft 1:5, “20” indicates 18 mm bearing diameter, and “MB” indicates metric connections. Understanding the code ensures correct selection.

2. Rotation Direction Verification: Confirm pump rotation matches system requirements before installation. “R” in the model code indicates clockwise (right-hand) rotation. Incorrect rotation swaps suction and pressure ports, potentially damaging the pump.

3. Fluid Cleanliness Management: Maintain system fluid cleanliness to ISO 4406:1999 21/18/15 or better. Gear pumps are sensitive to fluid contamination—install adequately rated filters to protect internal precision surfaces.

4. Inlet Condition Requirements: Ensure inlet piping is unobstructed to avoid excessive negative pressure. Inlet absolute pressure must not fall below 0.8 bar to prevent cavitation damage to gears and bearings.

5. Coupling Selection and Alignment: Select couplings based on the pump‘s maximum drive shaft torque (AZPF-12-022: 110 Nm). Maintain shaft concentricity within 0.05 mm to prevent premature bearing wear.

6. Temperature and Viscosity Monitoring: Ensure fluid viscosity remains within 12–800 mm²/s, recommended 20–100 mm²/s. During cold starts, ensure adequate fluid流动性; during high-temperature operation, monitor oil cooling.