Nachi variable piston Pump product catalog
Overview
Nachi Fujikoshi Corporation is a leading manufacturer of hydraulic components, offering a comprehensive range of variable displacement piston pumps designed for industrial, mobile, and specialized applications. These pumps feature Nachi’s proprietary semi-cylindrical swash plate technology, delivering exceptional energy efficiency, low noise operation, and high reliability.
Main Product Series
1. PVS Series Variable Volume Piston Pumps
Core Technology: Semi-circular barrel swash plate that receives pressure on its surface, ensuring stable discharge volume and eliminating excess flow.
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Model Range
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Displacement (cm³/rev)
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Max. Pressure (MPa)
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Speed Range (min⁻¹)
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Key Features
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PVS-0B
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8.0
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25
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800-1800
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Compact, lightweight, low noise (Design No. 30)
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PVS-1A/1B
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16.0, 22.0
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25
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800-1800
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Energy-saving, versatile control options
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PVS-2A/2B
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35.0, 45.0
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25
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800-1800
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High flow, pressure adjustment 3 type available
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Control Options:
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Pressure compensation (manual: N type)
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Remote pressure control (R type)
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Load sensing control (LS type)
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Electro-hydraulic proportional control (E type)
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Solenoid cutoff control (RS type)
Applications: Forging machinery, forming machines, large industrial equipment, injection molding machines
2. PZS Series High-Pressure Variable Volume Piston Pumps
Core Technology: Enhanced semi-cylindrical swash plate with increased piston count (9-11) for improved rigidity and noise reduction.
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Model Range
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Displacement (cm³/rev)
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Max. Pressure (MPa)
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Speed Range (min⁻¹)
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Key Features
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PZS-3A/3B
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70.0, 72.0
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31.5
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800-1800
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High reliability, long life, low vibration
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PZS-5A/5B
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110.0, 125.0
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31.5
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800-1800
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High flow, energy efficient
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PZS-6A/6B
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180.0
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31.5
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800-1800
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Heavy-duty applications, large industrial systems
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Key Advantages:
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O-ring seals for mating surfaces eliminate oil leaks
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Spherical valve plate maintains optimal hydraulic pressure balance across wide range
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Contamination resistance characteristics
Applications: Heavy construction equipment, mining machinery, marine systems, large presses
3. PZ Series Load Sensitive Variable Piston Pumps
Core Technology: Integrates semi-cylindrical swash plate with hydrostatic bearing mechanism and advanced noise reduction features.
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Model Range
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Displacement (cm³/rev)
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Max. Pressure (MPa)
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Speed Range (min⁻¹)
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Key Features
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PZ-2A/2B
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35.0, 45.0
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31.5
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800-1800
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Built-in electro-hydraulic proportional control valve
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PZ-3A/3B
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70.0
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31.5
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800-1800
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Force feedback system for improved hysteresis and repeatability
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Unique Features:
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Pump body houses compensator and surge cutoff valve, eliminating superfluous piping
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Double pump configuration possible with IP Pump
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Even quieter operation than PVS series
Applications: Mobile equipment, material handling systems, automated production lines requiring precise flow control
4. PZH Series High-Performance Variable Displacement Piston Pumps
Core Technology: Advanced axial-piston design optimized for extreme conditions.
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Model Range
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Displacement (cm³/rev)
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Max. Pressure (MPa)
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Speed Range (min⁻¹)
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Key Features
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PZH-3B
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72.0
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35.0
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800-1800
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Ultra-high pressure capability, compact design
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Key Advantages:
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High pressure (350 bar), low noise and energy saving technology in compact package
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Open loop circuit type, compatible with standard hydraulic fluids
Applications: Specialized industrial applications, test equipment, high-pressure systems
Common Features Across All Series
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Energy Efficiency: Semi-cylindrical swash plate eliminates excess discharge, reducing power loss and hydraulic costs
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Low Noise Operation: Proprietary low-noise mechanics on shoe, swash plate, and valve plate
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High Reliability: Robust construction with O-ring seals and spherical valve plates for long life
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Versatile Control: Multiple control options to match specific application requirements
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Wide Application Range: Suitable for industrial, mobile, and specialized hydraulic systems
Technical Specifications Summary
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Parameter
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PVS Series
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PZS Series
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PZ Series
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PZH Series
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Displacement Range
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8.0-45.0 cm³/rev
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70.0-180.0 cm³/rev
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35.0-70.0 cm³/rev
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72.0 cm³/rev
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Max. Operating Pressure
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25 MPa
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31.5 MPa
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31.5 MPa
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35.0 MPa
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Speed Range
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800-1800 min⁻¹
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800-1800 min⁻¹
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800-1800 min⁻¹
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800-1800 min⁻¹
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Fluid Type
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Mineral hydraulic oil
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Mineral hydraulic oil
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Mineral hydraulic oil
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Mineral hydraulic oil
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Temperature Range
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-10°C to +80°C
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-10°C to +80°C
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-10°C to +80°C
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-10°C to +80°C
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Mounting Type
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Flange, Foot
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Flange, Foot
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Flange, Foot
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Flange, Foot
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Ordering Information
Each model designation includes:
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Series (PVS/PZS/PZ/PZH)
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Frame size (0B/1A/1B/2A/2B/3A/3B/5A/5B/6A/6B)
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Displacement (cm³/rev)
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Control type (N/R/LS/E/RS)
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Special features (Z for thru shaft, K for keyed shaft, etc.)
Example: PVS-2B-45N1-E13 (PVS series, 2B frame, 45 cm³/rev, pressure compensation control, special feature E13)
Notes
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PVS-3B production has been discontinued; use PZS-3B instead
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Design No. 30 applied on PVS-0B for compactness, light weight, and noise reduction
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Pressure adjustment 3 type available for PVS-1B-22 and PVS-2B-45
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For complete technical details, refer to the official Nachi product data sheets and catalogs
