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The NACHI PVS Series is a line of variable displacement piston pumps independently developed by NACHI, renowned for its core advantages of energy conservation, low noise, and high reliability. It is widely used in various high-pressure and high-precision industrial scenarios by virtue of its optimized structural design and flexible adaptability.
This series of piston pumps is widely used in industrial fields that require high pressure and high precision. It is commonly installed in injection molding machines, die-casting machines, and powder metallurgy molding machines within the molding industry. It is also applied to CNC machine tools, metal processing forging equipment, mining equipment, loaders, elevators, and other special engineering machinery to provide stable hydraulic power support.
During installation, the pump shaft must be positioned horizontally, utilizing a flexible coupling to connect the pump shaft and the drive shaft. The eccentricity between the two shafts should be limited to 0.05 mm, with angle errors strictly controlled. Suction side pressure must be kept above -0.03 MPa, and the flow rate at the suction port should not exceed 2 m/s. The drain pipe should be partially raised above the top of the pump body to limit the drain back pressure to within 0.1 MPa.
| Parameter Category | Specific Value | English Description |
|---|---|---|
| Model | NACHI PVS-2B-45 | Variable displacement piston pump, part of NACHI PVS series for industrial hydraulic systems |
| Displacement | 45.0 cm³/rev | Displacement per revolution, determining the pump's flow output at a given speed |
| Maximum Working Pressure | 25 MPa | Continuous operating pressure limit for stable hydraulic power output |
| Peak Pressure | 28 MPa | Short-term maximum pressure tolerance (not for continuous operation) |
| Rotational Speed Range | 500 – 2000 min⁻¹ | Minimum speed for reliable suction; maximum speed for efficient operation |
| Mass | 21 kg | Net weight of the pump, for installation load planning |
| Control Type | Pressure Compensation Control | Automatically adjusts displacement based on system load to save energy |
| Suction Port Size | PT 1¼ | Threaded port specification for inlet pipeline connection |
| Discharge Port Size | PT 1 | Threaded port specification for outlet pipeline connection |
| Operating Fluid Temperature Range | 10 – 60 ℃ | Recommended temperature range for hydraulic oil to ensure seal and component durability |
| Fluid Viscosity Range | 20 – 400 mm²/s | Suitable hydraulic oil viscosity range for smooth operation and lubrication |
The PVS series covers multiple models with different displacements to adapt to different flow requirements. Note: The production of the PVS-3B model has been discontinued, and NACHI recommends using the PZS-3B as an alternative.
| Model | Displacement (cm³/rev) | Maximum Working Pressure (MPa) | Min Speed (min⁻¹) | Max Speed (min⁻¹) | Key Control Type |
|---|---|---|---|---|---|
| PVS-0B-8 | 8 | 25 | 500 | 2000 | Pressure Compensation Control |
| PVS-1B-16 | 16.5 | 25 | 500 | 2000 | Pressure Compensation Control |
| PVS-1B-22 | 22 | 25 | 500 | 2000 | Pressure Compensation Control |
| PVS-2B-35 | 35 | 25 | 500 | 2000 | Pressure Compensation Control |
| PVS-2B-45 | 45 | 25 | 500 | 2000 | Pressure Compensation Control |
Delivery information typically includes delivery times, shipping methods, packaging, etc., which may vary depending on the seller and the location of purchase.
