4525V50-A21-1BB-22R Vickers Double Vane Pump 162+67cc 172bar

Model Number	4525V50-A21-1BB-22R

Product Description

Product Overview

The 2520V / 2525V / 3520V / 3525V / 4520V / 4525V / 4535V series are Eaton Vickers (now Danfoss) V Series fixed-displacement double vane pumps designed for industrial hydraulic systems requiring independent dual-circuit output. These units are precision direct interchanges for original Vickers double pumps including 4535V60, 4535V50, 4535V42 and 4525V50-A21-1BB-22R. Featuring a balanced vane design and precision-machined cartridges, they deliver high volumetric efficiency and low noise. Every pump and cartridge kit undergoes 100% simulated duty-cycle testing to guarantee exact match of mounting flanges, shaft ends, port locations and performance curves.

Technical Specifications

Models: 4525V50-A21-1BB-22R / 4535V60 / 4535V50 / 4535V42 (and 2520V / 2525V / 3520V / 3525V / 4520V / 4525V / 4535V range)
Geometric displacement: Shaft-end (45V) Code 50 = 162 cm³/r; Code 60 = 193 cm³/r; Code 42 = 138 cm³/r; Cover-end (25V) Code 21 = 67 cm³/r
Continuous rated pressure: 172 bar (2500 psi)
Peak pressure: approximately 190–207 bar depending on conditions
Maximum speed: 1800 r/min
Minimum recommended speed: approx. 600 r/min
Control type: Fixed displacement (no variable control); independent dual outputs; straight-keyed or splined shaft options; configurable port positions
Approximate weight: 45–60 kg depending on configuration
Ports: Standard SAE 4-bolt flange
Seals: Standard or Viton (F3) optional
Mounting flange: Standard SAE C

Key Technical Advantages

Independent dual-output design: Shaft-end and cover-end sections supply separate circuits, enabling compact dual-circuit systems.
Balanced vane and floating side-plate design: Hydraulic balancing reduces vane wear; floating plates automatically compensate clearance for high volumetric efficiency and low internal leakage.
Precision machining for true interchangeability: Rotor, cam ring and side plates match original Vickers tolerances, mounting dimensions, shaft ends and port orientations exactly—direct drop-in replacement; supports independent cartridge kit service.
Low noise and long-life bearings: Optimized flow paths and vane configuration minimize ripple and noise; quality bearings and seals support continuous industrial duty.
100% simulated operating-condition testing: Full pressure, flow, leakage and noise verification ensures consistency with OEM performance curves.

Application Areas

Injection molding machines, die-casting machines, machine-tool hydraulic systems, presses, steel and metallurgical equipment, port machinery, industrial power units and fixed hydraulic systems requiring dual independent circuits.

Expert Maintenance Tips

Ensure precise shaft alignment during installation to avoid excessive radial or axial loads. Maintain inlet pressure between 0 and 0.35 bar to prevent cavitation. Use anti-wear hydraulic oil (ISO VG 32–68 recommended); target system cleanliness of ISO 18/16/13 or better. Fully bleed air before initial start-up and monitor temperature and leakage during break-in. Cartridge kits can be replaced without removing the pump body. Periodically inspect shaft seals and bearings; never allow dry running. Verify that combined torque does not exceed the shaft rating.

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