Nachi PVD Series Hydraulic Vane Pump | PVD16 PVD25 PVD50 Replacement

Genlu Hydraulic proudly introduces our precision-engineered PVD Series high-pressure vane pumps, designed for superior efficiency and low-noise fluid delivery in demanding industrial hydraulic systems. This series serves as a precise match for Nachi technical specifications, comprehensively covering the full displacement range including PVD16, PVD25, PVD32, PVD40, and PVD50, and fully compatible with complex engineering codes such as PVD16EH140C2G024Z and PVD25EH140C2G024. Genlu unequivocally guarantees 100% Drop-in Interchangeability in mounting flanges, drive shafts, port configurations, and geometric displacements. Backed by our uncompromising 100% Simulation Load Testing, each pump is validated for volumetric efficiency, noise-level benchmarks, and continuous durability before dispatch, ensuring relentless, stable, and pulsation-free flow delivery for your hydraulic circuits.

Technical Specifications 

• Product Series: Nachi PVD Series High-Pressure Vane Pump

• Representative Models: PVD16EH140C2G024Z, PVD25EH140C2G024

• Displacement Range: 16 cc/rev to 50 cc/rev (Model-dependent)

• Rated Operating Pressure: 140 bar (2030 psi)

• Max Peak Pressure: 160 – 200 bar (Application-dependent)

• Rated Speed: 1500 – 1800 rpm

• Control Mode: Fixed displacement, mechanically driven

• Structural Configuration: High-performance vane compensation, internal high-pressure self-balancing bearing set

Key Technical Advantages:

• Low-Pulsation & Low-Noise Design: Utilizing optimized rotor-vane curves and precision-engineered port plate channels, we effectively minimize pressure pulsations caused by vane-passage frequency. This ensures exceptionally low vibration and fluid noise, ideal for high-precision manufacturing environments.

• Superior Volumetric Efficiency: Through high-precision rotor assembly machining and self-compensating vane design, the vanes maintain constant contact with the stator wall. This minimizes internal leakage even under higher pressure conditions.

• Contamination-Resistant Compensation: The integrated auto-balancing mechanism provides enhanced tolerance to micro-particulates in hydraulic fluid. Compared to standard gear pumps, the PVD series exhibits minimal flow degradation over extended service intervals.

• Advanced Heat-Treatment Process: Critical friction-pair components (rotor, stator, vanes) undergo vacuum quenching and specialized surface hardening. This yields extreme hardness and wear resistance, maintaining perfect sealing performance even in systems with frequent pressure fluctuations.

Application Areas:

• Machine Tools: Power sources for CNC milling machines and grinders.

• Plastics Machinery: Auxiliary systems and clamping force power for injection molding machines.

• Industrial Automation: Automated production lines, press-fit machines, material lift, and clamping units.

• Hydraulic Power Units: Centralized oil supply stations for medium-to-small hydraulic systems.

Expert Maintenance Tips:

• System Bleeding Procedure: Vane pumps must never be started under high pressure if air is present in the circuit. Upon initial installation or fluid replacement, slowly bleed the system through the drain port until oil runs bubble-free to prevent vane scoring caused by “dry friction.”

• Fluid Cleanliness Standards: While this pump offers excellent contamination resistance, maintain fluid cleanliness at ISO 4406 18/16/13. A 20μm inlet filter is strongly recommended for sustained performance.

• Rotation Direction Verification: Vane pumps are direction-sensitive (check for the rotation mark on the housing). Never operate the pump in reverse, as it will cause immediate and irreparable damage to the internal port plate and stator assembly.