Rexroth AZPW Series Gear Pump | AZPW-11-008 AZMF-12-008 | High Pressure External Gear Pump

The AZPW Series high-pressure external gear pumps (and AZMF variants) by Chengyuan Hydraulic are high-performance power units engineered to the rigorous standards of Rexroth. This range focuses on precise replacements for part numbers such as R9830322 and advanced models like AZMF-12-008RFB20MB-S0013.

The AZPW/AZMF series is renowned for its compact design and exceptional axial/radial pressure compensation. Chengyuan ensures 100% original-place interchangeability for mounting flanges, shaft extensions, and port locations. Every pump undergoes 100% simulated load testing before dispatch, guaranteeing superior volumetric efficiency and ultra-low operating noise under continuous high-pressure conditions.

Technical Specifications 

• Compatible Series: Rexroth AZPW / AZMF Series (Frame Size 1)

• Core Models: AZPW-11-008, AZMF-12-008, R9830322

• Geometric Displacement: 8.0 $cm^3/rev$

• Continuous Pressure (P1): 250 bar (25 MPa)

• Peak Pressure (P3): Up to 315 bar (31.5 MPa)

• Maximum Speed: 3500 – 4000 rpm

• Minimum Speed: 500 rpm

• Shaft Specification: Tapered or Parallel Keyed shaft

• Mounting Flange: SAE A (2-bolt) or European 4-bolt standard

• Control Type: Fixed Rotary Gear

• Average Weight: Approx. 2.8 – 3.5 kg

Key Technical Advantages:

• Axial Floating Compensation: Utilizing side-plate axial pressure compensation technology. As pressure increases, the side plates automatically tighten against the gear faces, minimizing internal leakage and maintaining over 90% volumetric efficiency at 250 bar.

• High-Load DU Composite Bearings: Equipped with high-strength DU bearings designed to withstand significant radial loads. These self-lubricating bearings form a stable oil film at high speeds, significantly extending the pump’s service life.

• Precision-Rolled Gearing: The gears are made from premium steel through precision rolling and grinding. The high-accuracy involute profile ensures smooth operation and minimizes flow pulsation and hydraulic noise.

• High-Strength Extruded Aluminum Body: The pump body is made of extruded high-strength aluminum alloy, which not only reduces weight but also offers excellent heat dissipation for continuous heavy-duty operation.

Application Areas:

• Mobile Machinery: Pilot oil supply or steering systems for forklifts and mini-excavators.

• Industrial Equipment: Compact hydraulic power units (HPU) and auxiliary systems for injection molding machines.

• Agricultural Machinery: Tractor lifting devices and harvester hydraulic controls.

Expert Maintenance Tips:

• Strict Priming Protocol: Never run the pump dry. Fill the pump with clean hydraulic oil through the outlet port before start-up. Ensure suction resistance does not exceed -0.3 bar to prevent cavitation.

• Filtration Standard: A system filtration level of ISO 4406 20/18/15 is highly recommended. Particles in the fluid can scratch the side plates, leading to a sudden drop in pressure.

• Coupling Alignment: Ensure the coupling alignment deviation is within 0.1mm. Never strike the shaft end with a hammer during installation, as this will damage the internal thrust bushings and shaft seals.