2520V 3520V 4535V Vickers Double Vane Pump 172-207 Bar

Product Overview

The 2520V/3520V/4535V series are double fixed-displacement vane pumps manufactured to original Eaton Vickers specifications, covering V industrial-grade and VQ mobile-grade lines. Featuring a series-connected dual-cartridge coaxial drive design, they deliver two independent pressure flows for multi-circuit hydraulic systems, with full on-site interchangeability with genuine Vickers pumps. Equipped with 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 and mobile applications. 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: V series industrial double fixed-displacement vane pumps, VQ series mobile double fixed-displacement vane pumps
• Available models: 2520V, 3520V, 4535V, 2520VQ, 3520VQ, 4535VQ, typical models 2520VQ21C1411CC20, 3520V25A14-1CC-22-R, 4535V-60A32-86CC22R
• Frame combination & geometric displacement range:
  • 2520V/VQ (25 frame shaft-end pump + 20 frame cover-end pump): Shaft end (25V/VQ): 32.5 – 67.5 cm³/rev (size 10 – 21) Cover end (20V/VQ): 16.4 – 45.4 cm³/rev (size 5 – 14) Typical model 2520VQ21C14: shaft end 67.5 cm³/rev + cover end 45.4 cm³/rev
  • 3520V/VQ (35 frame shaft-end pump + 20 frame cover-end pump): Shaft end (35V/VQ): 81.6 – 121.6 cm³/rev (size 25 – 38) Cover end (20V/VQ): 16.4 – 45.4 cm³/rev (size 5 – 14) Typical model 3520V25A14: shaft end 81.6 cm³/rev + cover end 45.4 cm³/rev
  • 4535V/VQ (45 frame shaft-end pump + 35 frame cover-end pump): Shaft end (45V/VQ): 138.7 – 193.0 cm³/rev (size 42 – 60) Cover end (35V/VQ): 81.6 – 121.6 cm³/rev (size 25 – 38) Typical model 4535V-60A32: shaft end 193.0 cm³/rev + cover end 102.8 cm³/rev
• Rated continuous operating pressure: V series industrial: 207 bar (3000 psi) for 20 frame cover-end pumps, 172 bar (2500 psi) for 25/35/45 frame shaft-end pumps VQ series mobile: up to 210 bar (3000 psi) full range
• Intermittent peak pressure: max. 110% of corresponding continuous pressure, ≤ 0.5 second per cycle
• Rated operating speed: 1800 rpm (V series industrial); up to 2700 rpm (VQ series small-displacement mobile)
• 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: SAE 4-bolt standard flange mounting (identified by “A” in model code)
• Drive shaft options: type 1 standard keyed shaft, type 11 involute splined shaft, type 86 heavy-duty keyed shaft
• Port configurations: SAE flange ports (“A”) and straight thread ports (“C”) available, multi-position port layouts supported
• Design series: 20 series, 22 series standard industrial designs
• Rotation direction: clockwise R (viewed from shaft end), counter-clockwise L optional
• Weight range: approx. 18 – 85 kg (increases with frame size)

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/lubrication 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 integrated 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 the main bearing. 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 graded wear-resistant technology: The one-piece high-strength grey cast iron housing provides excellent impact and deformation resistance, eliminating housing expansion risk under high pressure. The stator ring is made of high-hardness alloy cast iron with a super-finished inner cam profile (Ra ≤ 0.4 μm); 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. Tighten mounting flange bolts evenly in a diagonal sequence to specified torque to prevent pump misalignment.
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 the rated value for the corresponding frame, and peak pressure duration must not exceed 0.5 seconds. Maximum speed for V series industrial models must not exceed 1800 rpm; VQ mobile models shall be derated according to displacement. 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.