Guangdong Yanhui Hydraulic Co., Ltd. is one of the leading manufacturers and suppliers of variable hydraulic piston pump in China. We warmly welcome you to wholesale bulk variable hydraulic piston pump for sale here from our factory. If you have any enquiry about pricelist and quotation, please feel free to email us.
Product Overview
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Variable hydraulic piston pumps are advanced power transmission components designed to deliver precise, efficient, and adjustable hydraulic energy for modern fluid power systems. Unlike fixed displacement pumps, these pumps automatically regulate output flow by changing internal displacement, allowing the hydraulic system to match power supply with actual load demand. This results in significant energy savings, lower operating temperatures, and improved overall system stability.
The pump typically adopts an axial piston structure with a swash plate design. By altering the swash plate angle, piston stroke changes, which directly controls flow rate without affecting prime mover speed. This design enables smooth, stepless flow control and stable pressure regulation, making it ideal for applications that require variable speed, fine motion control, or load-responsive performance.
Variable piston pumps are engineered for high-pressure operation, compact installation, and long-term reliability. Their precision internal components ensure high volumetric and mechanical efficiency, while integrated control options such as pressure compensation, load sensing, and electro-hydraulic proportional control provide flexible system integration. These features allow machines to operate more intelligently, reduce unnecessary energy consumption, and minimize hydraulic shock and wear.
Key Advantages
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- High-strength cylinder block and pistons for high-pressure operation
- Precision swash plate mechanism for smooth displacement adjustment
- Integrated control valves for pressure and flow regulation
- Low noise design with optimized fluid channels
- Long service life due to reduced internal leakage and wear
Technical Datasheet
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| Parameter | Specification Range |
|---|---|
| Pump Type | Axial piston, variable displacement |
| Structure | Swash plate design |
| Displacement Range | 10 – 500 cc/rev |
| Rated Working Pressure | 250 – 350 bar |
| Maximum Peak Pressure | Up to 420 bar |
| Speed Range | 500 – 3000 rpm |
| Flow Control Modes | Pressure compensated / Load sensing / Electro-proportional |
| Control Response | Fast dynamic response (model dependent) |
| Volumetric Efficiency | Up to 95% |
| Mechanical Efficiency | Up to 93% |
| Rotation Direction | Clockwise / Counterclockwise |
| Mounting Standards | SAE flange / ISO standard |
| Shaft Options | Splined / Keyed / Taper shaft |
| Port Type | SAE / BSPP / Metric thread |
| Operating Temperature | -20°C to +90°C |
| Recommended Fluid | Mineral hydraulic oil (HL, HLP) |
| Filtration Requirement | ≤ 25 μm (recommended finer filtration) |
| Noise Level | Low-noise design with reduced pulsation |
| Weight Range | Varies by displacement size |
| Application Type | Industrial / Mobile hydraulic systems |
Applications
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- Construction machinery: excavators, loaders, cranes for smooth, load-adaptive operation.
- Industrial equipment: presses, injection molding, and metal forming machines for stable pressure and efficient production.
- CNC and automation: precise actuator control and consistent motion in machines and robotics.
- Marine systems: steering, winches, and deck machinery requiring reliable hydraulic power.
- Mining and heavy industry: drilling rigs, crushers, and loaders under high-pressure, heavy-duty conditions.
- Agricultural machinery: tractors, harvesters, and sprayers with energy-efficient, load-responsive hydraulic flow.
Related Models
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Bosch Rexroth
- A10VSO series
- A4VSO series
- A11VO series
- A2FO / A2FM (bent axis type)
Kawasaki
- K3V series
- K5V series
- K7V series
- K3VG series
Parker
- PV series
- PVP series
- P2 / P3 series
Danfoss
- Series 45
- Series 90
- H1 series
Eaton Vickers
- PVH series
- PVB series
- PVE series
Yuken
- A series variable pumps
- AR series
Nachi
- PVD series
- PVS series
- PZ series
Linde
- HPR series
- HPV series
FAQ
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What happens if the swash plate control fails?
The pump may default to maximum or minimum displacement depending on design, which can cause system overheating or loss of motion control. Immediate inspection is required.
How does load-sensing improve efficiency?
It allows the pump to maintain only the pressure required by the load plus a small margin, reducing unnecessary high-pressure operation.
Can variable piston pumps operate at low speed?
Yes, but very low speeds may reduce lubrication effectiveness. Always follow the minimum speed specified for stable operation.
What causes excessive pump noise?
Common causes include air in the oil, cavitation from poor suction conditions, misalignment, or worn internal components.
Is case drain flow important?
Yes, excessive case drain flow indicates internal wear or leakage and should be monitored to prevent failure.
Contact Us
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Our sales and technical team is ready to help you select the right pump, provide quotations, and ensure genuine branded parts for your hydraulic systems.
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