Eaton Vickers Type Vane Pump 25v21a1a22r Instructions
1. Model Code Breakdown: What Does 25V21A1A22R Mean?
Understanding the model code helps ensure correct selection and installation:
25V Series – Medium-pressure single vane pump series
21 – Displacement code indicating flow capacity
A (SAE flange) – Standard 4-bolt SAE mounting flange
1 (Shaft type) – Straight shaft with key
A (Port position) – Standard outlet port orientation
22 – Design series / revision number
R – Clockwise rotation (viewed from the shaft end)
2. Key Features of the Eaton Vickers 25V Vane Pump
Stable and efficient performance
Optimized vane and cam ring design ensures smooth flow and low pulsation under medium pressure.Durable construction
High-quality materials are used for vanes, rotor, and cam ring to improve wear resistance and service life.Compact design
Small footprint and lightweight structure make it easy to integrate into various hydraulic systems.Easy installation and maintenance
Modular design allows for quick servicing and reduced downtime.
3. Working Principle
The Eaton Vickers vane pump operates using a rotor with sliding vanes inside an eccentric cam ring. As the rotor turns, centrifugal force pushes the vanes outward against the cam ring.
Increasing chamber volume creates suction, drawing hydraulic oil into the pump
Decreasing chamber volume forces oil out through the outlet port
This continuous process provides stable hydraulic flow with low noise and high efficiency.
4. Installation and Commissioning Guidelines
4.1 Before Installation
Ensure the pump is clean and free from transport damage
Verify rotation direction, shaft type, and port orientation
Flush the hydraulic system to remove contaminants
4.2 Installation Steps
Mount the pump securely using the correct SAE flange
Align the shaft properly to avoid excessive radial or axial loads
Connect inlet and outlet ports correctly and ensure airtight suction lines
4.3 Start-Up and Testing
Run the pump at no load during initial start-up
Check for abnormal noise, vibration, or leakage
Gradually increase pressure and flow to rated operating conditions
5. Operation and Maintenance Tips
Use clean hydraulic oil and replace filters regularly
Inspect wear parts such as vanes and cam ring during scheduled maintenance
Avoid dry running, as it can cause rapid internal damage
Store unused pumps in a dry, clean environment to prevent corrosion
6. Conclusion
The Eaton Vickers 25V21A1A22R vane pump is a proven and dependable solution for medium-pressure hydraulic applications. Proper installation, correct operation, and regular maintenance are essential to achieving long-term reliability, stable performance, and maximum efficiency.