Eaton Vickers PVM Series Piston Pump | PVM074ER09GS2A31 | Medium Pressure

The PVM Series axial piston pumps by Chengyuan Hydraulic are high-performance power units fully compatible with Eaton Vickers industrial standards. Specifically engineered for demanding industrial applications, the PVM range (centered on the PVM074 model) balances high output with a compact physical footprint. Its advanced nine-piston design significantly reduces pressure ripples and operational noise. As Chengyuan’s premier replacement solution, every PVM pump undergoes 100% simulated full-load testing to verify the response accuracy of the pressure compensator, ensuring 100% original-place interchangeability.

Technical Specifications:

• Core Model Codes: PVM074ER09GS2A315000000AB series

• Displacement: 74 cm³/rev (4.5 in³/rev)

• Nominal Operating Pressure: 280 bar (4000 psi)

• Peak Pressure: 320 bar (4600 psi)

• Rated Speed (Self-priming): 1800 rpm

• Max Speed (With Boost): 2400 rpm

• Control Type (ER): Pressure Compensator with remote options

• Input Shaft (09): SAE C Splined Shaft

• Mounting Flange (GS): SAE C 2-bolt

• Seals (31): Viton (FKM), suitable for varied hydraulic fluids

Key Technical Advantages:

• Industry-Leading Low Noise: Through optimized timing grooves in the valve plate and a high-strength cast iron housing, the PVM series generates noise levels 5-10 dB lower than traditional pumps. This is vital for enclosed plant environments.

• Nine-Piston Balancing Technology: The odd-numbered piston arrangement balances instantaneous flow fluctuations, minimizing pressure ripples at the outlet. This enhances the stability of actuators and extends the service life of downstream valve components.

• High-Reliability Swashplate Bearing System: Specially hardened bearings are designed to withstand frequent loading/unloading cycles. Integrated high-capacity case drains ensure thermal stability and mechanical durability under continuous 280 bar pressure.

• Modular Control Logic: Control codes (e.g., A/C) support various compensator logics, including Load Sensing, Remote Adjustment, and Torque Control, allowing for seamless integration into automated hydraulic circuits.

Application Areas:

• Industrial Manufacturing: Metal forming presses, injection molding machines, and machine tool power units.

• Material Handling: Dockside machinery and large-scale lifting platforms.

• Energy Equipment: Waste compactors, biomass balers, and compact hydraulic stations.

Expert Maintenance Tips:

• Case Priming Procedure: Before the initial start or after long idle periods, the pump case must be filled with clean hydraulic oil through the highest drain port. Dry running will cause immediate catastrophic damage to the piston shoes and swashplate.

• Drain Backpressure Management: Ensure the drain line goes directly back to the tank. Backpressure must not exceed 1-2 bar, as excessive pressure can rupture the shaft seal and interfere with compensator accuracy.

• Precise Compensator Setting: Use a high-precision gauge when adjusting the pressure compensator bolt. It is recommended to set the value at no more than 90% of the system’s design limit to maintain a safety margin.