Existing crankshaft reciprocating high-pressure water pumps require lubricating grease to lubricate the plungers. For industries such as food, medical, seawater desalination, textiles, and firefighting that require high cleanliness and pollution-free water sources, these existing pumps clearly cannot meet the requirements. Moreover, this type of pump generally suffers from the inability to adjust flow; lubricating oil can easily cause fires and must be replaced frequently, leading to high maintenance costs; the pump is bulky, inefficient, has high noise and vibration, and consumes significant energy. Industries with high requirements for water quality and pressure in China usually import water-lubricated axial piston pumps from the foreign company Danfoss. For a long time, Danfoss has monopolized the supply of high-pressure water pumps for this sector, with expensive products, uncertain delivery times and after-sales service, and a limited product range with non-adjustable flow. Furthermore, when cleaning such pumps, a high-pressure pump is required, resulting in considerable energy waste.
To resolve the long-standing issues of domestic crankshaft reciprocating pumps and imported high-pressure pumps, our company launched a dedicated project to develop pure water lubricated axial plunger pumps and related technologies. The product has reached the world-leading level, filled a domestic gap, and has broad market prospects.
Our company has improved the structure of the swashplate axial piston pump. Water serves as both the working medium and the lubricating medium. During pump operation, it simultaneously achieves self-lubrication and self-cooling, delivering pollution-free high-pressure water with maintenance-free operation. The multiple axially arranged plungers and hydraulically returned plunger structure make the pump body compact and small. The adjustable swashplate structure allows flow adjustment of the same pump without changing the dimensions of pump components. Advanced metal materials, sealing materials and plunger-slipper structures, combined with advanced equipment and manufacturing processes, ensure excellent sealing, high working pressure and efficiency, corrosion resistance, wear resistance, long service life and low noise. A flushing check valve is installed at the water outlet, so a standard cleaning pump can be used instead of starting the high-pressure pump, reducing energy consumption and improving economy.
Pure Water Lubricated Axial High-Pressure Plunger Pump
The product is widely used in various reverse osmosis water treatment systems, including seawater desalination, municipal landfill leachate treatment systems, and industrial wastewater zero-discharge systems. It has operated stably for a long time and received positive feedback from users.
The product has passed inspection by the National Center for Quality Supervision and Testing of Seawater and Brackish Water Desalination Utilization and has obtained a product inspection report.
The product has passed inspection by the National Center for Quality Supervision and Testing of Pump and Valve Products and has obtained an inspection report.
The product has obtained the Zhejiang Provincial Industrial New Product (New Technology) appraisal certificate.
The project was included in the 2015 Central Budget Investment Project Catalogue for Energy Conservation, Circular Economy and Resource Utilization of the National Development and Reform Commission, and received corresponding allocated funds.
The product is used in reverse osmosis water treatment systems. The main technical specifications are as follows:
| No. | Parameter | Value | No. | Parameter | Value |
|---|---|---|---|---|---|
| 1 | Flow rate per pump (m3/h) | 0.3~90 | 2 | Working pressure (MPa) | 5~7 |
| 3 | Speed range (rpm) | 0~3000 | 4 | Water recovery rate (%) | Up to 40 |
| 5 | Maintenance‑free period (h) | >9000 | 6 | Salt rejection rate (%) | Min. 99.7 |
| 7 | Operating voltage/frequency (V/Hz) | AC380/50 | 8 | Motor power (kW) | 1.1~180 |
The reverse osmosis seawater desalination system using our water-lubricated axial piston pump offers the following advantages over similar products:
No need for oil lubrication – self-lubricating, maintenance‑free, low cost, intrinsically safe and reliable; improves membrane cleanliness and product water quality. Small pump size, high efficiency, low energy consumption – the whole system is compact and aesthetically pleasing. Advanced materials and processes provide corrosion resistance, wear resistance, longer life, lower noise and vibration. Advanced sealing materials and structures ensure high volumetric efficiency and no leakage.
Adjustable swashplate structure allows flow adjustment without changing the overall pump configuration, meeting different system requirements at various stages – more energy‑efficient and economical without pump replacement. Integrated flushing check valve enables flushing without starting the high‑pressure pump, further reducing system energy consumption. Breaks the monopoly, replaces and exceeds imported products, lowers the total cost of existing seawater desalination systems, and ensures strategic security for national key projects. Local enterprise – convenient service and guaranteed delivery time.
Can be paired with our own energy recovery device or energy recovery pump unit to further reduce water production cost.
Copyright 2026 WoerTechnology Co., Ltd. All rights reserved. 
浙ICP备19023994号-1
