SVPF-20/70-10 Yuken Variable Vane Pump 20L/min 70bar

Product Overview

The SVPF-08, SVPF-12, SVPF-15, SVPF-20, SVPF-30 and SVPF-40 series (including SVPF-20/70-10 and similar models) are Yuken-style low-pressure variable displacement vane pumps. Featuring a pressure-compensated variable mechanism, these pumps offer adjustable flow and pressure with low noise, compact size, high efficiency, fast response and long service life. 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 Yuken SVPF units 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 and other compact light-duty equipment.

Technical Specifications 

(Based on Yuken and related official technical data; theoretical values excluding efficiency and tolerances)

• Series: SVPF-08 / SVPF-12 / SVPF-15 / SVPF-20 / SVPF-30 / SVPF-40
• Typical model: SVPF-20/70-10 (or SVPF-20-70-20 etc.): Unloading flow approx. 20 L/min @ 1800 r/min, displacement approx. 11.1 cm³/r
• Reference unloading flows (@1800 r/min):
  • SVPF-12: approx. 12 L/min
  • SVPF-30: approx. 30 L/min
  • SVPF-40: approx. 40 L/min
• Maximum operating pressure: 70 kgf/cm² (approx. 6.9 MPa / 70 bar)
• Pressure adjustment range: 10–70 kgf/cm² (depending on pressure code 20/35/55/70)
• 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 or 4-bolt); shaft diameter options φ12.7 / φ15.875 / φ19.05 mm etc.
• Approximate weight: 5.5 kg for SVPF-12/20; 8 kg for SVPF-30/40
• 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 Yuken SVPF 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 (20/35/55/70 kgf/cm²) 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
• Injection molding machine auxiliary systems: low-pressure high-flow or variable 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.