PVH74-QIC-RF1S-10-C2531 Eaton Vickers Variable Piston Pump 250bar

Product Overview

The PVH74-QIC-RF1S-10-C2531 and PVH74QIC-RF-1S-10-C25V-31-057 are precision-engineered interchangeable axial piston variable-displacement pumps fully compatible with the Eaton Vickers PVH Series. Designed in swashplate configuration for open-circuit systems, flow is proportional to drive speed and displacement, with pressure-compensator control that automatically adjusts displacement within the set pressure range. These units deliver 100% form-fit-function interchangeability with original Eaton/Vickers models. Every pump undergoes rigorous 100% simulated operating-condition testing to guarantee volumetric efficiency (typically ≥95%), low noise and reliability under continuous rated conditions.

Technical Specifications 

• Models: PVH74-QIC-RF1S-10-C2531, PVH74QIC-RF-1S-10-C25V-31-057 (Quiet Industrial Control version)
• Geometric displacement (max): 73.7 cm³/rev (4.5 in³/rev)
• Rated continuous pressure: 250 bar (3625 psi)
• Peak/intermittent pressure: up to approximately 280 bar (in load-sensing systems)
• Maximum speed (QI industrial version, zero inlet pressure): 1800 rpm
• Typical effective flow (1800 rpm, 250 bar): approx. 125 L/min (33 USgpm)
• Control type: Pressure compensator (C type, adjustment range 70–250 bar, factory setting typically 250 bar / C25); options for load sensing (V), torque limiter (T) or industrial control (IC)
• Direction of rotation: Clockwise (R, viewed from shaft end)
• Mounting flange: SAE C 4-bolt
• Housing material: High-strength cast iron
• Approximate weight: Basic 39–45 kg; thru-drive 42–48 kg
• Recommended fluid viscosity: 16–40 cSt (operating)
• Design number: 10 (installation dimensions unchanged for design numbers 10–19)

Key Technical Advantages

1. High volumetric efficiency and precision swashplate design. Optimized rotating group and valve plate deliver typical volumetric efficiency of 95% or higher under rated conditions, minimizing internal leakage and maximizing power density.
2. Low-noise industrial (QI) configuration. Specially optimized valve plate and flow paths significantly reduce operating noise, making these pumps ideal for noise-sensitive fixed industrial installations.
3. Flexible pressure compensation with optional controls. Standard C compensator precisely limits maximum system pressure; optional load-sensing (V) or torque-limiter (T) functions enable demand-based flow and input-power protection for improved energy efficiency.
4. Heavy-duty bearings and long-life construction. Robust shaft and bearing system combined with a high-strength cast-iron housing minimizes internal deflection and wear, supporting continuous 250 bar duty and extended service intervals.
5. Full dimensional and functional interchangeability with original Eaton/Vickers PVH74 units, including mounting, shaft, ports and control interfaces, plus thru-drive capability for multi-pump arrangements, allows true drop-in replacement without system modifications.

Application Areas

Suitable for open-circuit industrial and mobile hydraulic systems including injection molding machines, die-casting equipment, machine-tool hydraulic power units, metal-forming presses, plastics machinery, auxiliary circuits on construction equipment, port machinery and any application requiring stable high-pressure variable flow with precise pressure compensation.

Expert Maintenance Tips

Ensure precise shaft alignment and adequate suction-line diameter/length during installation to prevent cavitation. Confirm case drain is correctly routed to the reservoir with back pressure not exceeding 0.5 bar before start-up. Use anti-wear hydraulic oil and maintain operating viscosity between 16–40 cSt; monitor fluid cleanliness (target ISO 16/14/12 or better) and change filters regularly. Set the pressure compensator according to the system’s maximum working pressure and avoid prolonged over-pressure operation. When using thru-drive, observe torque limits of the secondary pump. Periodically inspect the valve plate, pistons and bearings; replace serviceable wear components as needed to restore performance.