Hydraulic Axial Piston Pump LPV90 for Hydrostatic Transmissions with Closed-Loop Circuit

Product Description

Hydraulic Axial Piston Pump LPV90 for Hydrostatic Transmissions with Closed-Loop Circuit

Variable displacement axial piston pumps introduction:

Step into the future of hydraulics with our axial piston pumps, precision-engineered to offer optimal efficiency and reliability. At the heart of our pumps is a finely tuned swash plate mechanism, ensuring precise control over fluid displacement and pressure. This innovative design allows for seamless operation across a wide range of applications, from manufacturing to mobile equipment, making our pumps the ideal choice for any hydraulic system seeking to enhance its performance.

Hydraulic axial piston pumps main features:

1. Variable displacement axial piston hydraulic pumps

2. Axial piston hydraulic pumps have swash plate structure

3. Be suitable for hydrostatic transmissions with closed-loop circuit

4. Manual servo and hydraulic variable control

5. Axial piston hydraulic pumps with a charging oil pump

6. LPV90 hydraulic variable displacement axial piston pump 

7. Hydraulic piston pump 42Mpa high pressure 

LPV90 Axial piston pumps technical specification:

Notices:

Protect your axial piston pumps from leaks and potential system failures with regular seal inspections. Worn or damaged seals can lead to fluid leaks, reducing the efficiency of your hydraulic system. By promptly replacing seals and o-rings at signs of wear, you maintain optimal pump performance and prevent costly downtime. Incorporate seal checks into your routine maintenance plan to ensure your pump operates smoothly.

Factory Production & Inspection Evidence

Shandong Highland Hydraulic Seiko Co., Ltd. manufactures the LPV90-MA-R-23 closed axial piston pump, and production details are recorded. The supplied project record lists a production quantity of 100 units, and the factory test report identifies the tested unit by Component No. 02604200203002.

• LPV – LPV series closed axial piston pump
• 90 – 90 mL/r displacement
• MA – manual servo control
• R – clockwise rotation
• 23 – 23-tooth input shaft (16/32 pitch)

Evidence type: factory production / product identification.

Factory Performance Testing

The LPV90-MA-R-23 is tested on a closed-loop hydraulic pump test bench. The test documentation records Component No. 02604200203002, a test on 2026/4/20 at 9:12, a test temperature of 22.7 °C and a power recovery ratio of 50%. Rated displacement is 90.5 mL/rev and rated pressure is 35 MPa; the test-bench main parameters are a maximum speed of 3200 r/min and a maximum pressure of 42 MPa.

Recorded Test Data

The closed-loop report logs speed, pressure, flow, displacement, torque, input power, output power, overall efficiency, volumetric efficiency and charge pressure for the LPV90-MA-R-23. Selected factory-recorded test points are provided for reference.

Charge pressure: 1.7 MPa; charge flow 22.4 L/min. Values are reproduced from the original test record and should be interpreted according to the test-bench measurement and calculation method.

Engineering Drawing & Dimensions

The supplied LPV70/90-MA-R/L-21/23/14-NN engineering drawing documents the mounting flange, output shaft spline, hydraulic ports, control interface and rotation direction of the LPV90-MA-R-23. Key interface information includes:

• High pressure ports A and B; leakage ports L1 / L2; oil suction port S
• High pressure relief valves A / B; low pressure relief valve
• Pressure taps Ma / Mb: 9/16-18; servo-cylinder pressure taps (both sides): 9/16-18
• Input shaft spline options: 21 teeth (16/32 pitch), 23 teeth (16/32 pitch), 14 teeth (12/24 pitch), 30° pressure angle
• Input shaft dividing circle diameters: Ø33.34 mm (21T) / Ø36.5 mm (23T) / Ø29.63 mm (14T)
• Control handle spline: 1/4-20 UNC-2A, 24 teeth, diametrical pitch 64/128, OD 9.5 mm (SAE 1963)
• Mounting: 4 bolts M12, 25 mm depth; ports L1 / L2 1 1/16-12; port S 1 5/16-12; relief valve options 32 / 35 / 40 MPa; charge/suction pressure 1.8–2.4 MPa
• Rotation direction R (clockwise) / L (anticlockwise)

Drawing technical requirement: minimum speed 500 r/min, maximum speed 3000 r/min, rated working pressure 30 MPa. Interface dimensions should be confirmed against the engineering drawing before installation.

Quality Control & Final Inspection

Quality control of the LPV90-MA-R-23 rests on product identification, factory test documentation and engineering specifications. The test report documents the pump's displacement, pressure, speed, flow and output power recorded during closed-loop testing.

• Product model identification
• Hydraulic pump performance testing
• Pressure and speed verification
• Flow and displacement recording
• Torque and power measurement
• Overall and volumetric efficiency recording
• Engineering interface verification

Dimensional inspection · surface and finish inspection · assembly inspection · leakage inspection · rotation (R / L) inspection · port and interface inspection · final inspection before packing.

Project Reference

The model is documented in the project record for a customer in Belarus. The record lists Shandong Highland Hydraulic Seiko Co., Ltd. as manufacturer, a quantity of 100 units and a rye harvester application.

• Project: Variable Piston Pump for Belarus
• Model: LPV90-MA-R-23
• Quantity: 100 units
• Application: Rye harvester
• Client: Belarus
• Manufacturer: Shandong Highland Hydraulic Seiko Co., Ltd.
• Drive configuration: Closed circuit hydraulic system

Technical Documents

Technical documents available for the LPV90-MA-R-23 include:

These documents provide data on displacement, speed, pressure, torque, power, temperature and weight, and confirm the LPV90 as a closed axial piston pump. The supporting documents are retained with the unit's component number for traceability.

FAQ of variable displacement axial piston pumps: 

Q1: Are you a manufacturer?

A: Yes, we are manufacturer to produce, design and test axial piston hydraulic pumps by ourselves.

Q2: How do you ship the goods and how long does it take to arrive?

A: Ship by air express, it takes 3-5 days to arrive. Airline and sea shipping also optional.

Q3: Do you offer guarantee for the products?

A: Each motor or pump should be tested before shipping, test report can be sent if requested.

Warranty 12 months after shipment for complete assembly.

Q4: What are the payment terms?

A: Full order: 30% as deposit, balance before shipment.

Small order/sample order: Full advance payment.

Q5: Do you test all piston pumps before shipment?

A: Yes, we have 100% test before shipment, we must guarantee pumps quality. 

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E-mail:ld@hldhydraulic.com

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