LPV Series Closed Circuit Axial Piston Pump

Closed Circuit Axial Piston Pump, LPV Series

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Hydraulic Pump
Closed Circuit Axial Piston Pump, LPV Series

LPV Series

Closed Circuit Axial Piston Pump

Variable displacement hydraulic pump for closed loop operation

The LPV series closed circuit axial piston pump is designed to deliver stability and power, drawing from the proven SUNDSTRAND 90 series design and adding innovative features like pressure cut-off protection and customizable options to fit your exact needs. Plus, with interchangeable parts that align with our HPV series, maintenance and servicing are straightforward and efficient.

Key Parameters

Displacement (ml/r): 30, 50, 70, 90, 110, 130, 160, 180, 200

Rated pressure (Mpa): 35

Max. pressure (Mpa): 42

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Features

Easy Maintenance and Safety: Our high-pressure relief valve is built into the pump’s rear cover, giving you easy access for maintenance and added pressure cut-off protection for system safety.
Customizable Design: We can customize the LPV pump’s rear cover to support specific control functions in your hydraulic systems, so you get exactly what you need.
Contamination-Resistant: Designed to perform in harsh conditions, the LPV pump’s strong internal structure keeps it running smoothly, even in challenging environments.
Built to Last: Made from high-quality materials and engineered for durability, the LPV pump’s components are tough, wear-resistant, and built for a long service life.
Simple Structure for Easy Service: With a straightforward design, the LPV pump is easy to assemble, disassemble, and maintain, keeping service time and costs low.

Typical Applications

The LPV Series is versatile across many applications:

Construction Equipment: Perfect for concrete mixers, rollers, pavers, loaders, and dozers.
Agriculture and Landscaping: Reliable for harvesters, mowers, and forage machines.
Mining Operations: Built for hydrostatic-driven dump trucks, tunnel loaders, and port conveyors.
Designed for any closed-circuit system that needs smooth, adjustable speed control.

Technical Data

Model			LPV30	LPV50	LPV70	LPV90	LPV110	LPV130	LPV160	LPV180	LPV200
Displacement	Rated displacement		30	50	70	90	110	130	160	180	200
Displacement	Max. displacement	ml/r	33.3	51.6	69.8	90.5	110.8	130	160	180	200
Rotation Speed	Max. continuous working speed (full load)	r/min	3500	3500	3200	3000	2900	2700	2400	2400	2400
	Rated speed	r/min	2500						2200
	Min. continuous working speed	r/min	500
Pressure	Rated pressure	Mpa	35
	Max. pressure (instantaneous)	Mpa	42
	Continuous working pressure (△P)	Mpa	30
	Max. permissible housing pressure (absolute)	Mpa	Constant 0.25 Peak value 0.5
Torque	Continuous output torque (under continuous working pressure)	Nm	162.3	252.3	342.6	432.9	535.3	632.4	776	875	972
Torque	Max. output torque	Nm	227	353	480	606	749	885	1000	1098	1200
Power	Continuous power	kW	41	72	98	128	137	162	191	224	279
Power	Max. power	kW	57	87	105	138	159	188	292	307	318
Temperature	Permissible housing temperature	℃	80
Temperature	Max. working temperature of oil tank	℃	70
Weight	Hydraulic pump weight (without hydraulic oil)	kg	44	45	62.5	63.5	71	96	98	140	144

Download Technical Drawings (PDF)

Closed Circuit Axial Piston Pump LPV-30(50)
1.49M

DownLoad
Closed Circuit Axial Piston Pump LPV-110
1.12M

DownLoad
Closed Circuit Axial Piston Pump LPV-70(90)
1.29M

DownLoad
Closed Circuit Axial Piston Pump LPV-130(160)
1.78M

DownLoad
Closed Circuit Axial Piston Pump LPV-180(200)
1.46M

DownLoad

Related Hydraulic Components

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Frequently Asked Questions

How does a hydraulic pump work?

A hydraulic pump works by using mechanical energy to pressurize fluid within a closed system. The pressurized fluid is then used to power machinery like excavators, presses, and lifts.

What types of hydraulic piston pumps are available?

There are two main types of hydraulic piston pumps: axial and radial. Both types can be fixed or variable displacement. A fixed displacement pump moves a set amount of fluid each cycle, while a variable displacement pump can adjust the amount of fluid moved per cycle.

How do you choose between an axial and radial piston pump?

Choosing the right hydraulic pump depends on an assessment of your application. Consider the required pressure, flow rate, speed, horsepower, and the type of fluid used. Radial piston pumps can handle a variety of fluids, including mineral oil and water-glycol hydraulic fluids, while axial piston pumps are preferred for high-pressure applications.

What are the characteristics of an axial piston pump?

The pistons in an axial piston pump are mounted axially, resulting in a compact structure, smaller radial dimensions, and low rotational inertia.
These pumps have high volumetric efficiency and can operate at high speeds and pressures, making them ideal for high-pressure systems.
The flow rate and oil intake/output direction can be controlled by adjusting the angle and direction of the swash plate.
Swash plate designs offer better automatic fluid intake capabilities than bent-axis designs.
Axial pumps are generally larger in axial dimensions, with greater axial forces and a more complex structure.

Why are piston pumps widely used?

Compared to gear pumps and vane pumps, piston pumps offer distinct advantages:

High operating pressure, with ratings typically between 20-40 MPa and up to 1000 MPa.
Easy to vary displacement by changing the stroke or rotation direction, allowing for single or bi-directional flow control.
Wide speed range due to design flexibility, with options for different piston diameters or quantities to achieve various flow rates.
High power transmission capability.

Overall, piston pumps stand out for their high pressure, compact structure, efficiency, and ease of flow adjustment, making them widely used in high-pressure, high-flow applications such as hydraulic presses, construction machinery, and marine equipment.

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