VQ215 VQ225 VQ325 VQ425 VQ435 Vickers Double Vane Pump 210 Bar

Product Overview

The VQ series double fixed-displacement vane pumps are industrial-grade hydraulic units manufactured to original Eaton Vickers specifications. The range includes VQ215, VQ225, VQ325, VQ425, VQ435 and DVQ425 through-drive models, featuring a series-connected dual-cartridge coaxial drive design that delivers two independent pressure flows for multi-circuit hydraulic systems, with full on-site interchangeability with genuine Vickers pumps. Featuring a 10-vane hydraulically balanced double-acting structure, this series delivers high volumetric efficiency, low flow pulsation and quiet operation. The high-strength one-piece grey cast iron housing ensures durability in harsh industrial environments. Every unit undergoes 100% full working condition simulation testing before delivery, with performance fully compliant with original factory standards, making it a cost-effective alternative to genuine Vickers double vane pumps.

Technical Specifications

• Brand: compatible with original Eaton Vickers mounting dimensions and performance specifications
• Product family: VQ series flange-mounted double fixed-displacement vane pumps (including DVQ through-drive versions)
• Available models: VQ215, VQ225, VQ325, VQ425, VQ435, DVQ425, typical model VQ435-136-66-F-RARA-02
• Frame combination & displacement range:
  • VQ215 (25 frame front + 15 frame rear): front pump 25.2–79.2 cm³/rev + rear pump 15.0–41.0 cm³/rev
  • VQ225 (25 frame front + 25 frame rear): front pump 25.2–79.2 cm³/rev + rear pump 25.2–79.2 cm³/rev
  • VQ325 (35 frame front + 25 frame rear): front pump 65.0–118.0 cm³/rev + rear pump 25.2–79.2 cm³/rev
  • VQ425 (45 frame front + 25 frame rear): front pump 134.0–189.0 cm³/rev + rear pump 25.2–79.2 cm³/rev
  • VQ435 (45 frame front + 35 frame rear): front pump 134.0–189.0 cm³/rev + rear pump 65.0–118.0 cm³/rev
  • Typical model VQ435-136-66: front pump 136 cm³/rev + rear pump 66 cm³/rev
• Rated continuous operating pressure: 210 bar (21 MPa)
• Intermittent peak pressure: 230 bar (23 MPa), ≤ 0.5 second per cycle
• Operating speed range: 600 – 1800 rpm
• Volumetric efficiency (rated condition): ≥ 94%
• Housing material: one-piece high-strength grey cast iron
• Seal material: NBR (compatible with mineral anti-wear hydraulic fluids); Viton optional for phosphate ester fluids
• Mounting: standard flange mounting (identified by suffix “F”)
• Drive shaft: standard keyed shaft; involute splined shaft optional
• Port position: RARA configuration (right outlet for both shaft-end and cover-end pumps), multi-position port customization available
• Rotation direction: clockwise (viewed from shaft end); counter-clockwise (suffix “L”) optional
• Weight:
  • VQ215 series: approx. 24.5 kg
  • VQ225 series: approx. 26.2 kg
  • VQ325 series: approx. 32 kg
  • VQ425 series: approx. 40.7 kg
  • VQ435 series: approx. 77.8 kg
  • DVQ425 through-drive: approx. 84 kg

Key Technical Advantages

1. Dual-circuit independent oil supply design: The series-connected dual-cartridge coaxial drive delivers two separate pressure flows with independent flow rates and pressures, supplying main actuation, control and cooling circuits respectively. Compared with single-pump plus flow-dividing valve systems, it reduces throttling and overflow losses, improving system energy efficiency by over 20%, while simplifying hydraulic circuit design and reducing valve count and system heat generation.
2. Cartridge-style pump core design: Both pump stages feature integrated cartridge assemblies, integrating rotor, stator ring, vanes and valve plate into a single plug-and-play unit. The cartridge can be replaced quickly without removing the pump mounting flange or connecting pipelines, improving maintenance efficiency by 60%. Mounting dimensions and port positions perfectly match original Vickers standards for full on-site interchangeability, significantly minimizing equipment downtime.
3. 10-vane hydraulically balanced double-acting technology: The 10-vane double-acting inner cam design ensures complete radial hydraulic force balance, eliminating extra radial load on bearings. Output flow pulsation is controlled within ±2.5%, and operating noise is 8–10 dB(A) lower than equivalent gear pumps. The hydraulically self-compensating vane design automatically extends to maintain contact with the stator bore as wear occurs, sustaining volumetric efficiency above 94% over long service life.
4. Robust housing and wear-resistant friction pairs: The one-piece high-strength grey cast iron housing provides excellent impact and deformation resistance, eliminating housing expansion risk at 210 bar high pressure. The stator ring is made of high-hardness alloy cast iron with a super-finished inner cam profile; vanes are made of wear-resistant copper-based alloy with optimized rounded tips for tight contact under high pressure, minimizing internal leakage and delivering excellent pressure-holding performance.
5. 100% full-condition factory validation: Every pump undergoes full-performance bench testing under rated pressure, peak pressure and rated speed. Core indicators including volumetric efficiency, internal leakage, noise level and temperature rise are verified item by item. All test data is traceable to ensure performance fully matches original Vickers specifications.

Application Areas

• Injection molding and die casting machine multi-circuit hydraulic systems (clamping, injection, ejection)
• CNC lathes, machining centers and grinding machine main drive and auxiliary control hydraulic stations
• Excavators, loaders, forklifts and other construction machinery travel and working device hydraulic systems
• Rolling mills and continuous casting machine multi-circuit hydraulic drives
• Press machines, bending machines and shearing machine hydraulic systems
• Automated production lines and hydraulic fixture multi-circuit power units

Expert Maintenance Tips

1. Installation alignment control: Connect the pump shaft to the prime mover with a flexible coupling, and ensure coaxiality tolerance ≤ 0.1 mm. Direct belt or gear drive is prohibited to avoid bearing and shaft damage from radial loads. For through-drive models (DVQ series), the same alignment requirement applies to the rear-end load connection.
2. Air venting and oil filling before first startup: Before initial startup, fill the pump housing with clean hydraulic oil through the drain port and bleed air from the suction line to prevent dry running damage to vanes and valve plate surfaces. Ensure both pump stages are filled and bled for double-pump configurations.
3. Fluid and cleanliness requirements: ISO VG46 HLP anti-wear hydraulic oil is recommended. Maintain operating temperature between 20°C and 60°C, with a short-term maximum of 80°C. Oil cleanliness shall meet NAS 8 grade or higher; a 100 μm suction filter and a 25 μm return-line filter are recommended.
4. Pressure and speed operation guidelines: Continuous operating pressure must not exceed 210 bar, and peak pressure duration must not exceed 0.5 seconds. Maximum operating speed must not exceed 1800 rpm. During cold start, run at reduced speed until oil temperature rises to normal operating range.
5. Scheduled maintenance interval: Perform routine maintenance every 2000 operating hours to inspect seal aging, pump core wear and mounting bolt torque. Replace hydraulic oil every 6000 operating hours, and clean the oil tank and pipelines simultaneously to prevent contaminants from entering the pump and accelerating wear. Replace cartridge assemblies promptly when volumetric efficiency drops below 90% or abnormal noise and pressure fluctuation occur.