Nachi Type P16 P31 Piston Pump | P16VL-11 P31VL-20 P31VR-20 | Variable Displacement Pump

Nachi Type P16 & P31 Series Variable Displacement Piston Pumps

Product Overview: The P16 and P31 Series are industry standards for achieving high-efficiency and low-noise operation in industrial hydraulic systems. As variable displacement piston pumps, this range automatically adjusts output flow based on system pressure, significantly reducing energy consumption and heat generation. Thanks to Nachi’s superior engineering, the P16VL, P31VL (Left Rotation), and P31VR (Right Rotation) models exhibit exceptional volumetric efficiency across all operating conditions.

This selection features essential custom configurations, including the P16VL-11-EP-T-01-S137-J and P31VL-20-EP-T-21-S138-J with advanced pressure compensation, and the standard P31VR-20-CM-21-S121-J. These pumps are the premier choice for CNC machine tools, die-casting machinery, automated industrial equipment, and energy-saving Hydraulic Power Units (HPUs).

Key Technical Advantages:

• Energy-Efficient & Low Thermal Loss: The precise variable displacement structure minimizes flow output when the system reaches the preset pressure, greatly reducing energy waste.

• Superior Noise Reduction: Fluid-dynamically optimized internal components significantly lower operational noise levels, providing a quiet workspace even at high pressures.

• High Reliability & Extended Service Life: Core friction components are made from high-strength, wear-resistant materials, ensuring stable flow output under continuous heavy-duty loads.

• Flexible Directional Options: Available in VL (Left/Counter-Clockwise) and VR (Right/Clockwise) configurations to adapt to various motor installation requirements.

Detailed Specifications & Parameters:

• Core Series: Nachi Type P16 & P31 Series Piston Pumps.

• Featured Model Matrix: P16VL-11-EP-T-01-S137-J, P31VL-20-EP-T-21-S138-J, P31VR-20-CM-21-S121-J.

• Core Performance Specs:

  • Displacement Rates: P16 Series (16 cm³/rev); P31 Series (31.5 cm³/rev).

  • Rotation Type: VL (Left Rotation); VR (Right Rotation).

  • Max Operating Pressure: Rated up to 21 MPa (3,000 PSI) to 25 MPa (3,600 PSI).

  • Control Types: EP (Electro-proportional / Pressure compensation); CM (Manual pressure compensation).

  • Design Sequence: S137, S138, S121 (representing specific custom design sequences).