PVF-30-35-20 Variable Vane Pump 16.7 cm³/r 3.5 MPa

Product Overview:

The PVF-30-35-20, PVF-30-55-10S, PVF-30-70-10 and PVF / VP-30/40/12/15/20-70/55/35 series are variable displacement vane pumps. These units feature pressure-compensated control for automatic displacement adjustment, delivering low noise, low pulsation and energy-saving performance. Manufactured to exact original geometric tolerances, they offer true drop-in interchangeability—matching mounting flanges, shaft ends and port centers precisely—so they can replace OEM units without system modifications. Every pump undergoes 100% simulated duty-cycle testing to verify volumetric efficiency, pressure retention and control accuracy. Hydraulic balancing of the vanes combined with precision-machined cam rings and rotors ensures long service life, making them ideal for machine tools, injection molding machines and industrial hydraulic systems.

Technical Specifications 

• Model: PVF-30-35-20 / PVF-30-55-10S / PVF-30-70-10 (PVF-12/20/30/40 and VP series)
• Displacement: geometric approx. 16.7 cm³/r (PVF-30); series range approx. 5–22 cm³/r
• Rated flow (1800 rpm, 3.5 bar): approx. 30 L/min (PVF-30)
• Operating pressure range: PVF-30-35 = 1.5–3.5 MPa; PVF-30-55 = 3.0–5.5 MPa; PVF-30-70 = 5.0–7.0 MPa
• Maximum operating pressure: up to 7.0 MPa (70 bar)
• Speed range: minimum 800 rpm; maximum 1800 rpm
• Control type: variable (mechanical pressure compensator, adjustable pressure range)
• Mounting: flange mount
• Shaft: standard keyed or splined (S code)
• Approximate weight: 9 kg (PVF-30)
• Seals: standard Buna-N

Key Technical Advantages

1. True drop-in interchangeability and precision machining: Exact match to original mounting dimensions, shaft ends and port centers enables direct OEM replacement without system changes, minimizing downtime and modification costs. High-precision cam ring, rotor and vane processing ensures consistent performance.
2. High volumetric efficiency with hydraulic balancing: Pressure-balanced vanes significantly reduce cam-ring wear, delivering high volumetric efficiency and energy-saving pressure-compensated control.
3. Low-noise and low-pulsation design: Optimized inlet geometry and vane configuration minimize oil turbulence and flow ripple, resulting in quiet operation suitable for precision machine-tool environments.
4. Fast response and long-life bearings: Pressure compensator provides rapid response; quality bearings and wear-resistant materials extend service life and simplify field maintenance.

Application Areas

Hydraulic systems for machine tools and machining centers, injection molding and die-casting machines, plastic machinery, industrial hydraulic power units and constant-pressure or energy-saving circuits.

Expert Maintenance Tips

1. Ensure precise shaft alignment during installation (flexible coupling recommended) to avoid additional radial or axial loads that accelerate bearing wear.
2. Fully prime the pump and verify a leak-free, air-free suction line before initial start-up; use clean anti-wear hydraulic oil of high cleanliness class.
3. Maintain suction and return filters regularly to prevent particle ingress that can score vanes and the cam ring; keep operating oil temperature within recommended range.
4. Adjust the pressure compensator screw according to original instructions; for long-term storage, run the pump briefly every 3–6 months to prevent internal corrosion.