VA1-12FA3 Kompass Variable Vane Pump 12L/min 70bar

Product Overview

The VA1/VB1/VC1/VD1 series (including VA1-12FA3, VB1-20FA2 and VB1-20FA3) are low-pressure variable displacement vane pumps featuring a pressure-compensated variable mechanism for adjustable flow and pressure. They offer compact size, low noise, high efficiency and fast response. We specialize in the R&D and manufacturing of high-pressure pumps, motors and valve blocks. Our products provide 100% drop-in interchangeability with genuine equivalent models and undergo 100% simulated operating-condition testing. Precision machining and high-quality materials ensure stable adjustable flow under medium-to-low pressure conditions, ideal for machine tools, shoe-making machines, grinding machines and other compact light-duty equipment.

Technical Specifications

(Based on manufacturer technical data; theoretical values excluding efficiency and tolerances)

• Series: VA1, VB1, VC1, VD1
• Typical models:
  • VA1-12FA3: Unloading flow approx. 12 L/min @ 1800 r/min, max pressure 70 kgf/cm² (approx. 7 MPa / 70 bar)
  • VB1-20FA2 / VB1-20FA3: Unloading flow approx. 20 L/min @ 1800 r/min, pressure adjustment range by A2/A3 code (up to 70 bar)
• Other reference flows (@1800 r/min unloading): VA1 series approx. 8–15 L/min; VB1 approx. 20–24 L/min; VC1/VD1 larger
• Continuous pressure: up to 70 kgf/cm² (approx. 7 MPa)
• Pressure adjustment ranges: A1 approx. 0.8–2.0 MPa; A2 approx. 1.5–3.5 MPa; A3 approx. 3–7 MPa
• Speed range: 800–1800 r/min
• Control: Pressure-compensated variable displacement (flow automatically adjusts with pressure); fixed rotation (normally clockwise)
• Mounting & ports: Flange mounting (2-bolt), shaft diameter approx. φ12.7 mm
• Approximate weight: 5–6.5 kg for VA1/VB1 series
• Other: Low-noise design, fast response, suitable for medium-to-low pressure systems

Key Technical Advantages

1. Precision pressure-compensated variable mechanism: Internal pressure feedback automatically adjusts displacement for energy-saving operation. Pressure and flow are flexibly settable with rapid response.
2. Low-noise and high-efficiency design: Optimized vane-to-stator geometry delivers smooth, quiet running and high volumetric efficiency, ideal for noise-sensitive precision equipment.
3. Compact structure and long service life: Small size and light weight combined with high-quality materials and precision machining ensure excellent wear resistance and reliability with easy maintenance.
4. 100% drop-in interchangeability and simulated-condition testing: Overall dimensions, mounting interfaces, shaft types and performance curves match genuine equivalent units exactly for direct replacement. Every unit undergoes 100% simulated operating-condition testing to verify pressure, flow, efficiency and sealing performance.
5. Flexible pressure rating configurations: Multiple pressure codes (A1/A2/A3) available to meet diverse system requirements.

Application Areas

• Machine tools and machining centers: clamping, slide feed and auxiliary circuits
• Shoe-making machines and light industrial equipment: compact hydraulic power source
• Grinding machines and special-purpose equipment: low-pressure adjustable oil supply
• General industrial equipment: medium-to-low pressure systems requiring adjustable flow and low noise

Expert Maintenance Tips

• Before installation, confirm rotation and shaft diameter match the host machine. Ensure adequate suction line diameter and proper sealing to avoid cavitation.
• Use hydraulic oil with cleanliness meeting ISO 4406 18/16/13 or better; maintain suitable viscosity at operating temperature. Run at low speed during cold starts.
• Regularly check the pressure adjusting screw and compensator mechanism to keep set pressure stable; avoid prolonged over-pressure operation.
• When replacing seals or internal components, maintain strict cleanliness; perform air bleeding and low-pressure test run after assembly.
• Perform preventive inspections every 2000–4000 hours depending on duty cycle; monitor noise, temperature and any flow changes, and service promptly.