What is Piston Pumps
A piston pump is a type of pump that operates based on the reciprocating motion of a piston. It consists of a piston inside a cylinder. As the piston moves, it changes the volume of the chamber. When the piston moves to increase the volume, fluid is drawn in through an inlet valve. When the piston moves to decrease the volume, the fluid is pushed out through an outlet valve. Piston pumps are known for their high - pressure capabilities and are used in various applications such as in hydraulic systems and for pumping liquids in industrial settings.
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![Rexroth A6VM250 Variable Piston Motor For Excavator & Drilling Rig High Torque Hydraulic Drive]()
Rexroth A6VM250 Variable Piston Motor For Excavator & Dri...A6VM250 bent-axis variable piston motor with 250cc displacement, rated pressure 350bar and peak pressure 400bar. It supports infinite variable displacement and multiple control modes, suitable for
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![A10VG63 Variable Displacement Pump For Asphalt Paver Mining Equipment Drilling Rig Hydraulic System]()
A10VG63 Variable Displacement Pump For Asphalt Paver Mini...A10VG63 has a displacement of 63 cm³/rev, rated pressure 350 bar, and maximum pressure 400 bar, providing strong output and precise variable control.Designed with robust bearings and precision
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![A10VG45 Hydraulic Closed Circuit Pump For Road Roller Loader Agricultural Machinery Mining Equipment]()
A10VG45 Hydraulic Closed Circuit Pump For Road Roller Loa...A10VG45 features a displacement of 45 cm³/rev, rated pressure 350 bar, and peak pressure 400 bar, delivering high torque and excellent hydraulic efficiency.Optimized valve plate and piston design
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![A10VG28 Axial Piston Hydraulic Pump For Excavator Road Roller Asphalt Paver Construction Machinery]()
A10VG28 Axial Piston Hydraulic Pump For Excavator Road Ro...A10VG28 offers a displacement of 28 cm³/rev, rated pressure 350 bar, and maximum pressure 400 bar. It provides smooth variable control and excellent power density.Designed for hydrostatic
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![A10VG18 Axial Piston Variable Pump For Mini Excavator Skid Steer Loader Agricultural Machinery Hydraulic System]()
A10VG18 Axial Piston Variable Pump For Mini Excavator Ski...A10VG18 is a closed-circuit axial piston variable pump with a displacement of 18 cm³/rev, rated pressure 350 bar, and peak pressure 400 bar. It offers fast response, compact size, and high
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![Rexroth A11VO260 Large Capacity Hydraulic Pump For Industrial And Construction Machinery]()
Rexroth A11VO260 Large Capacity Hydraulic Pump For Indust...The Rexroth A11VO260 is a 260 cc/rev axial piston variable pump for open-circuit systems, featuring 350 bar continuous pressure and 400 bar peak pressure.It provides high flow output, efficient power
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![Rexroth A11VO190 High-Flow Hydraulic Pump For Heavy Construction Machinery]()
Rexroth A11VO190 High-Flow Hydraulic Pump For Heavy Const...The Rexroth A11VO190 is a 190 cc/rev axial piston variable pump, built for open-circuit hydraulic systems, with a maximum continuous pressure of 350 bar and peak pressure of 400 bar.This model
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![Rexroth A11VO145 Axial Piston Pump For Industrial And Mobile Hydraulic Machines]()
Rexroth A11VO145 Axial Piston Pump For Industrial And Mob...The Rexroth A11VO145 is a 145 cc/rev axial piston variable pump for open-circuit systems, with 350 bar continuous pressure and 400 bar peak pressure.It offers high efficiency, precise flow control,
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![A11VO130 Hydraulic Pump For Mobile And Industrial Hydraulic Systems]()
A11VO130 Hydraulic Pump For Mobile And Industrial Hydraul...The Rexroth A11VO provides precise flow control, high efficiency, and stable operation for demanding hydraulic systems.Ideal for excavators, loaders, cranes, tractors, drilling rigs, and various
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![Rexroth A11VO95 Hydraulic Pump For Industrial Machinery And CNC Machines]()
Rexroth A11VO95 Hydraulic Pump For Industrial Machinery A...Rexroth A11VO pumps deliver precise flow control and stable performance under high pressure, ensuring long-lasting, energy-efficient operation.Widely used in construction, mining, agriculture, and
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![Rexroth A11VO75 Swashplate Piston Pump For Skid Steer Loaders And Road Machinery]()
Rexroth A11VO75 Swashplate Piston Pump For Skid Steer Loa...The A11VO75 features a swashplate axial piston variable design with a displacement of 75 cm³/rev, rated pressure of 350 bar, and peak pressure of 400 bar, delivering stronger continuous flow for
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![Rexroth A11VO60 Hydraulic Variable Pump For Compact Loaders And Small Construction Equipment]()
Rexroth A11VO60 Hydraulic Variable Pump For Compact Loade...The A11VO60 features a swashplate axial piston design with a displacement of 60 cm³/rev, rated pressure of 350 bar, and peak pressure up to 400 bar, delivering higher flow and stronger load capacity
Your Professional Piston Pumps Supplier！
Hangzhou Pinxin Hydraulic Technology Co., Ltd. is an excellent enterprise specializing in hydraulic component trade, hydraulic system design and hydraulic transmission. The company has factories in Hangzhou, Shanghai, Nanjing and Hefei. Its main business areas are various types of engineering machinery and equipment, large industrial equipment and marine engineering.
Wide Range Of Products
Our company is committed to providing Rexroth brand hydraulic pumps, hydraulic motors, reducer assemblies, control valves, accessories, gear pumps and gear motors to the mid- and aftermarket.
After-sales Service
The product provides a one-year warranty service, 24-hour remote video technical guidance on weekdays, and free parts repair, grease injection, and cleaning under normal use during the warranty period.
OEM and ODM Available
We can customize and design products according to customer needs.
Quality Assurance
Our products have passed CE, RoHS and other certifications.
Features of plunger pumps
High Working Efficiency
The plunger pump has the characteristics of high rated pressure and high efficiency. Its pressure performance is excellent and can meet the needs of high-pressure systems.
01
Convenient Flow Adjustment
The flow of the plunger pump can be adjusted by changing the stroke or the number of pistons, and the operation is simple and flexible.
02
Good Sealing Performance
It can effectively prevent liquid leakage and ensure the stable operation of the pump.
03
Strong Adaptability To The Medium
In principle, the plunger pump can transport any medium, and is almost not restricted by the physical and chemical properties of the medium, and has a wide range of applicability.
04
Good Suction Performance
Because of its good self-priming performance, it is usually not necessary to fill the pump with liquid before starting.
05
Cylinder:
The piston reciprocates in it, thereby changing the volume of the sealed working chamber.
Piston:
Relies on the reciprocating motion in the cylinder to achieve oil suction and oil pressure.
Suction Valve And Discharge Valve:
Control the suction and discharge of oil.
Power Transmission Device:
Provides power for the reciprocating motion of the piston.
Oil distribution plate (for axial piston pump)
Used for oil distribution, cooperates with the rotation of the cylinder to achieve oil distribution.
Slipper and variable head (some types)
In axial piston pumps, used to achieve variable adjustment and static balance of oil.
Sealing device
Such as piston sealing device, to ensure that the oil does not leak during pumping.
Application of Piston pumps
Hydraulic system
Piston pumps are used in various hydraulic systems, such as industrial hydraulic equipment, heavy machinery, mining machinery, etc.
Oil and gas industry
In oil extraction and natural gas production, piston pumps are used to convey and improve the flow of oil and gas, especially in high pressure and high temperature environments.
Pharmaceutical industry
Plunger pumps are often used in the pharmaceutical industry to provide precise flow control to ensure the uniformity and stability of ingredients during the production process.
Chemical industry
In chemical processing, piston pumps are used to convey various fluids, including corrosive and viscous liquids.
Working principle of Piston pump
Suction stroke
When the plunger moves backward, the volume in the pump chamber increases, causing the internal pressure to drop. At this time, the inlet valve opens and the liquid is sucked into the pump chamber through the suction pipe.
Discharge stroke
When the plunger moves forward, the volume of the pump chamber decreases and the internal pressure increases. At this time, the inlet valve closes, and the liquid is forced out through the discharge valve and flows to the pipeline or storage container.
Function of the valve
The plunger pump is usually equipped with a one-way valve. The inlet valve and the discharge valve together ensure the one-way flow of the liquid, thereby preventing the liquid from flowing back.
Cycle process
As the plunger continues to reciprocate, the pump chamber continuously completes the cycle of suction and discharge, and continuously delivers the liquid.
Types of Piston Pumps
Single-acting Plunger Pump: This pump generates pressure and sucks liquid in only one direction in each working cycle.
Double-acting Plunger Pump: Unlike single-acting pumps, double-acting pumps can suck and discharge on both sides during reciprocating motion, which is more efficient.
High-pressure Plunger Pump: This type of pump is suitable for occasions where high-pressure delivery is required, such as water jet cutting, cleaning and other fields.
Quantitative Plunger Pump: This pump can provide a constant flow rate during operation and is commonly used in industries such as chemicals, pharmaceuticals and food.
Variable Plunger Pump: The variable plunger pump can automatically adjust the output flow rate according to the needs of the system and is suitable for application scenarios with large flow changes.
Hydraulic Plunger Pump: Commonly used in hydraulic systems, it can generate hydraulic energy through the movement of the plunger and is widely used in mechanical equipment and engineering machinery.
Gear Plunger Pump：This pump combines the advantages of plunger pumps and gear pumps and is suitable for the delivery of a variety of liquids.
Customized Piston Pump
Flow And Pressure Requirements
Determine the required flow and working pressure according to the specific application of the plunger pump. The plunger pump can provide high pressure and precise flow control, so these parameters must be clarified.
Material Selection
Select appropriate pump body materials and sealing materials according to the properties of the conveyed liquid (such as corrosiveness, temperature, etc.). Common materials include cast iron, stainless steel, alloy materials, etc.
Size And Installation Method
Customize the size and interface form of the plunger pump according to the space limitations of the installation environment to facilitate compatibility with the existing system.
Drive Method
The plunger pump can be driven by electric, hydraulic or mechanical drive.
Operating conditions
The plunger pump needs to consider the working environment of the pump, such as temperature, humidity, vibration, etc., and adjust the design accordingly.
Control system
The plunger pump can be customized with corresponding control systems, such as microcomputer control, variable frequency drive, etc., to achieve automation and precise control.
Accessories and services
When customizing the plunger pump, you can consider supporting parts and services, including filters, valves, monitoring instruments, etc., as well as after-sales maintenance services.
Special functions
If special functions are required (such as high temperature resistance, corrosion resistance, low noise, etc.), corresponding modifications and optimizations can be made in the design.
Frequently Asked Questions
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