NACHI Style PVF Series Vane Pump | PVF-20-55-10 | PVF-30-70-10S | High Pressure

The PVF Series from LIC Hydraulic is a premier line of High-Pressure Variable Displacement Vane Pumps. Renowned for their high efficiency and silent operation, models like the PVF-20-55-10 and PVF-30-70-10S utilize a direct-acting pressure compensator to deliver oil flow only when required by the system. Specifically engineered to bridge the gap between standard vane pumps and high-pressure piston pumps, the PVF series is the go-to choice for precision industrial machinery. We provide 100% drop-in replacements, matching original mounting interfaces, shaft splines, and performance curves.

Technical Highlights

• Series: PVF-20, PVF-30, PVF-40 frame sizes.

• Max Pressure: Continuous duty up to $210\text{ bar}$ ($3000\text{ psi}$).

• Control Type: Pressure compensated (automatic flow reduction at set pressure).

• Design: Direct-acting swash-ring vane technology.

Core Advantages

• Hybrid Performance: Combines the high-pressure capability of a piston pump with the smooth, pulse-free delivery of a vane pump.

• Thermal Management: By shifting to zero flow during pressure-holding cycles, the PVF pump minimizes internal friction and hydraulic turbulence, keeping oil temperatures low and extending seal life.

• Rugged Construction: Built with high-tensile cast iron housings and hardened internal components (cam rings and vanes) to withstand the rigorous duty cycles of 24/7 manufacturing.

• Compact Footprint: The integrated compensator eliminates the need for external relief valves in many circuits, simplifying the hydraulic power unit (HPU) design and saving space.

Expert Maintenance Tips

• Pressure Setting: Always adjust the pressure compensator screw to $10\text{–}15\text{ bar}$ above your maximum required working pressure to ensure a stable response without frequent “hunting.”

• Oil Cleanliness: To maintain the precision tolerances of the cam ring and dual-vane tips, maintain fluid cleanliness at ISO 18/16/13. Particle contamination is the #1 cause of efficiency drop.

• Inlet Conditions: Vane pumps are sensitive to suction vacuum. Ensure the inlet hose is appropriately sized and the suction strainer is clean to prevent cavitation “chatter.”