VVP Series Variable Displacement Hydraulic Vane Pump | VVP1-16 VVP1-20 VVP1-25 | 70 Bar Low Noise

The VVP Series by Chengyuan Hydraulic is a high-performance, low-noise variable displacement vane pump designed for maximum energy efficiency in hydraulic circuits. Its intelligent pressure-compensation mechanism automatically reduces flow output when the preset pressure is reached, maintaining system pressure with minimal power loss. Fully compatible with international standards, the VVP series (including VVP1, VVP2, and VVP3) provides 100% original-place interchangeability for leading industrial brands. At Chengyuan, every unit is subjected to 100% simulated condition testing, ensuring precise responsiveness and robust performance under full $70\text{ bar}$ loads.

Technical Specifications

• Series Models: VVP1, VVP2, VVP3, VVP4

• Displacement Options:

  • VVP1-16: $16\text{ cm}^3\text{/rev}$

  • VVP1-20: $20\text{ cm}^3\text{/rev}$

  • VVP1-25: $25\text{ cm}^3\text{/rev}$

• Rated Operating Pressure: $7\text{ MPa (70 bar / 1015 psi)}$

• Max Operating Pressure: $7.5\text{ MPa}$

• Pressure Adjustment Ranges:

  • Code A: $0.8\text{–}3.5\text{ MPa}$

  • Code B: $3.5\text{–}7.0\text{ MPa}$

• Speed Range: $800\text{–}1800\text{ rpm}$

• Rotation Direction: RR (Clockwise) or LL (Counter-clockwise)

• Efficiency: Volumetric Efficiency $\ge 90\%$

Key Technical Advantages

• Intelligent Pressure Compensation: Equipped with a precision internal adjustment valve and feedback springs. When the system becomes static, the pump switches to stand-by mode, consuming only $20\%\text{–}30\%$ of the energy required by fixed displacement pumps.

• Acoustically Optimized Design: The pump housing and fluid channels are CFD-optimized to reduce turbulence. Combined with ultra-fine ground vanes and cam ring profiles, the operating noise is kept between $65\text{–}70\text{ dB}$, ideal for quiet indoor environments.

• Hardened Alloy Steel Components: Rotors and cam rings are crafted from high-grade alloy steel with deep nitriding treatment (HRC 60+). This ensures exceptional wear resistance and long-term stability even in systems with moderate contamination.

• Mirror-Finished Side Plates: The side plates are precision-ground to a mirror finish, ensuring superior axial sealing and high volumetric efficiency while minimizing heat generation due to internal friction.

Application Areas

• Precision Machine Tools: Power source for hydraulic clamping and tool-changing systems in grinders and lathes.

• Light Machinery: Ideal for shoe-making machines, woodworking equipment, and packaging lines.

• Automation Units: Compact HPUs for robotic arms, jigs, and fixtures requiring steady pressure maintenance.

Expert Maintenance Tips

• Independent Drain Port: The VVP series requires an external drain line connected directly to the reservoir. Ensure the drain line is submerged below the oil level and has sufficient diameter to keep backpressure minimal, protecting the shaft seal.

• Initial Priming: Before the first start or after long periods of downtime, fill the pump housing with clean hydraulic oil through the drain port to prevent dry-start damage to the internal components.

• Air Purging: During startup, jog the motor under no-load conditions to purge all air from the pump casing and pipelines. This prevents cavitation and erratic vibrations.