GPA1-1-E-20R6.3 Vickers Gear Pump 1 cm³ High Pressure

Product Overview

The GPA1-1, GPA1-2, GPA1-4, GPA2-6, GPA2-10, GPA2-16, GPA3-25 and GPA3-50/63 series (examples GPA1-1-E-20R6.3, GPA1-2-E-20R6.3) are high-performance external gear pumps from Vickers (Eaton)/Duplomatic. Fixed-displacement design engineered for medium- to high-pressure mobile and industrial hydraulic systems. Compact construction, low noise and high volumetric efficiency. Fully interchangeable with original mounting dimensions, shaft ends, flanges and ports – true drop-in replacement. Every unit undergoes 100% simulated operating-condition testing to guarantee reliable output under rated pressure and speed. Ideal for OEMs and aftermarket applications demanding interchangeability and consistent performance.

Technical Specifications 

• Models: GPA1-1-E-20R6.3, GPA1-2-E-20R6.3, GPA1-4, GPA2-6, GPA2-10, GPA2-16, GPA3-25, GPA3-50/63 (GPA series)
• Brand: Vickers (Eaton)/Duplomatic
• Type: High-performance external gear pump (fixed displacement, single or multiple)
• Displacement: GPA1 series 1–7.5 cm³/rev; GPA2 series 4.5–31.7 cm³/rev; GPA3 series 22–61 cm³/rev (GPA1-1 ≈ 1 cm³/rev, GPA2-6 ≈ 6.5 cm³/rev class)
• Continuous pressure: GPA1/GPA2 up to 260 bar; GPA3 up to 250 bar (depending on size)
• Intermittent pressure: up to 290–310 bar
• Peak pressure: up to 300–310 bar
• Maximum speed: GPA1 up to 4000 rpm; GPA2 up to 4000 rpm; GPA3 up to 3000 rpm
• Minimum speed: approx. 500–650 rpm
• Control: Fixed displacement
• Direction of rotation: Clockwise (R) or counterclockwise
• Drive shaft: European tapered or other standard ends
• Mounting flange: European 4-hole rectangular flange
• Port connections: Side threaded or flanged
• Housing material: Aluminum
• Weight: GPA1 approx. 1.3–1.9 kg; GPA2 approx. 3.3–4.6 kg; GPA3 approx. 5.8–8.8 kg

Key Technical Advantages:

1. High-precision gears and gap compensation design: Low internal leakage and reduced heat generation maintain high volumetric efficiency under high-pressure conditions.
2. Compact structure and low noise: Optimized tooth profile reduces pressure pulsation for quiet operation, suitable for noise-sensitive applications.
3. Full interchangeability: Mounting dimensions, shaft ends, flanges and ports match original exactly – true drop-in replacement without system modifications.
4. Long-life bearings and seals: High-quality plain bearings and seals withstand continuous high-pressure operation and extend service life.
5. 100% simulated-condition testing: Every unit is tested under actual working pressure, speed and load before shipment, ensuring consistent performance and reliability.

Application Areas

Machine tools, packaging machinery, injection molding machines, lifting equipment, die-casting machines, man-made board machinery, food machinery and any medium- to high-pressure fixed-displacement industrial or mobile hydraulic systems. Particularly suited for space-constrained applications with strict interchangeability requirements in both OEM and aftermarket use.

Expert Maintenance Tips

Install strictly according to original rotation direction and flange alignment to avoid additional radial or axial loads. Bleed the system thoroughly and verify suction-line sealing before first operation to prevent cavitation. Use mineral-based hydraulic oil meeting ISO/DIN standards (recommended operating viscosity 10–750 mm²/s) and maintain cleanliness class ISO 4406 20/18/15 or better. Monitor shaft-seal and housing temperatures regularly and stay within the allowed ambient temperature range. For long-term storage, seal all ports and fill with preservative oil. When replacing, always select the identical model or a fully tested interchangeable unit to maintain system matching and service life.