2520V12A5-86AB22R Eaton Vickers Double Vane Pump 172Bar

Product Overview

The 2520V12A5-86AB22R is a high-performance double hydraulic vane pump designed specifically for heavy-duty industrial and mobile machinery environments. Manufactured to rigorous engineering standards, this unit provides 100% direct drop-in interchangeability with the Eaton Vickers 2520V series. Combining two independent modular cartridge kits—a 25V front pump and a 20V rear pump—driven by a single heavy-duty input shaft, it simultaneously delivers two distinct high-pressure fluid sources. It features the industry-proven intra-vane technology, which significantly enhances volumetric efficiency and extends the pump’s operational lifespan under continuous high pressure. Before leaving our facility, every 2520V double pump is subject to 100% full-load simulated working condition testing to ensure its anti-pulsation capability and noise levels perfectly match OEM standards. It stands as an ideal, cost-effective “plug-and-play” replacement for system overhauls and dual-speed circuit upgrades.

Technical Specifications

• Model Number: 2520V12A5-86AB22R

• Brand Compatibility: 100% Interchangeable with Eaton Vickers 2520V Series

• Front Pump Displacement (12 USgpm Ring): 39.0 ml/rev

• Rear Pump Displacement (5 USgpm Ring): 16.2 ml/rev

• Rated Operating Pressure: 172 Bar (2500 psi)

• Maximum Speed: 1800 RPM (Subject to standard inlet and fluid viscosity conditions)

• Minimum Speed: 600 RPM

• Control Type: Fixed Displacement

• Rotation (Viewed from shaft end): Clockwise (R)

• Shaft Extension: No. 86 Shaft – Heavy Duty Keyed Shaft (provides superior torque capacity)

• Port Orientation: AB (Front pump outlet inline with inlet; Rear pump outlet 90° from inlet)

• Seal Material: BUNA N (Nitrile), suitable for standard anti-wear mineral hydraulic oils

• Approximate Weight: 36.5 kg

Key Technical Advantages

• Precision Intra-Vane Technology: This engineered system routes pressurized fluid into the gap between the intra-vane and main vane. This hydrostatically compensates for the massive outward centrifugal forces generated at high speeds. By dramatically reducing the contact stress between the vane tips and the cam ring, the pump sustains high volumetric efficiency (over 90%) even at a continuous 172 bar load.

• Dual Independent Cartridge Kits: Both the front and rear sections house fully independent, self-contained cartridge kits (comprising the rotor, cam ring, vanes, and pressure plates). During in-field maintenance, engineers can simply extract a worn cartridge and insert a new one without uncoupling the heavy pump housing from the structural bracket or disconnecting complex hydraulic piping.

• Fully Hydrostatically Balanced Design: The internal cam ring features a dual-elliptical profile that forms two diametrically opposed high-pressure and low-pressure quadrants. This precise symmetry ensures that hydraulic radial loads acting on the rotor perfectly neutralize each other, entirely eliminating eccentric side-loading on the shaft and bearings, thereby maximizing fatigue life.

• 100% True Plug-and-Play Interchangeability: With physical dimensions strictly adhering to the original Vickers specifications—including the SAE B mounting flange, the heavy-duty No. 86 shaft extension, and precise port bolt spacing—customers achieve a seamless 1:1 replacement with zero need for welding or structural modifications.

Application Areas

Thanks to its robust dual-circuit oil delivery, the 2520V12A5-86AB22R is heavily relied upon in medium-to-high pressure systems requiring precise flow distribution:

• Plastics & Rubber Machinery: Providing independent dual-circuit power (rapid approach and high-pressure holding) for injection molding machines.

• Heavy Metal Forming Presses: Serving as the core power unit for hydraulic press brakes and shears requiring rapid-advance and slow-press dual-speed circuits.

• Mobile & Marine Equipment: Powering marine winches, piling equipment, and auxiliary lifting/steering systems on construction machinery.

• Industrial Hydraulic Power Units (HPU): Acting as the central prime mover for large machine tools, machining centers, and automated manufacturing lines.

Expert Maintenance Tips

• Crucial Startup Bleeding & Priming: Because of the larger internal volume of double pumps, dry starting will cause instant catastrophic failure. Before the initial startup or after a cartridge rebuild, always pre-fill the pump casing with clean hydraulic oil through the highest vent port. Jog the electric motor 3 to 5 times (1-2 seconds per jog) to establish lubrication films and purge air before applying full system load.

• Strict Fluid Contamination Control: The micron-level internal clearances of intra-vane pumps are extremely sensitive to particulate matter. System fluid cleanliness must be strictly maintained at ISO 4406 Class 18/16/13 (or NAS 1638 Class 8). Installing an absolute return-line filter rated at 10μm is mandatory.

• Monitor Inlet Vacuum Levels: Ensure suction lines are appropriately oversized and free of bends or blockages. The inlet vacuum must never exceed 0.17 bar (5 in. Hg) during operation. Excessive suction resistance will trigger severe cavitation, which instantaneously destroys the polished inner surface of the cam ring and produces high-frequency screaming noise.