Cast Iron Hydraulic Variable Displacement Piston Pumps Agricultural

Product Description

Highland Agricultural Pumps Hydraulic Variable Displacment Piston Pumps

Highland Hydraulic Variable Displacment Piston Pumps introduction: 

Highland Hydraulic Variable Displacment Piston Pumps are becoming more and more common in agricultural industry, because hydraulic power could improve production efficiency, save labour and time, and bring much convenience to farming machine, such as flax harvester agricultrual. Our engineers are able to configure hydraulic pumps flexibly to meet the different needs of agricultural equipment flax harvester. 

Highland Variable Displacment Piston Pumps​ main features:

1. Variable Displacment Piston Pumps can connect gear pumps, piston pumps, double hydraulic pumps, triple or quadruple pumps. 

2. We have R&D team, and can design and custom make hydraulic pumps according to customers request. 

3. We can help customer design hydraulic system, solve hydraulic confusion. 

​4. ​Upon release of the control handle, swash plate return to zero position automatically and the flow reduces to zero.

5. Hydraulic pumps has shaft oil seals performance, even at the lowest temperature and high case pressure.

6. Servo valve of piston pump can connect function regulators and remote control systems.

Highland Agricultural pumps usage: 

Agricultural pumps play an important role in agricultural machinery, mainly used in flax harvester, combine harvesters, crop harvesters, planters, mowers and tractors etc many farming equipments for its safety, energy efficiency, ease of operation, and reliability.

Hydraulic oil notice of agricultural pumps: 

• The higher the cleanliness of the hydraulic oil, the longer the service life of the hydraulic pump.
• Hydraulic oil:
• Generally speaking, the replacement time of hydraulic oil of sealed oil tank system is 2000hours. If the hydraulic oil is contaminated or other outside material bears abnormal running condition, the hydraulic oil should be changed often.
• Hydraulic oil in the open oil tank system should be changed every 500hours. For different vehicle, the measures should determined by specific design and operational experience.

Company service: 

• Factory direct sales, one year warranty.
• Hydraulic technical support, one-stop service system.
• Lightning supply.
• Regular single product Supply for immediate delivery, batch can be quickly shipped according to customer demand.
• Commitment to warranty hydraulic pump and hydraulic motor within one year.
• Provide personalized and customized services according to customer needs.

Factory Performance Testing

Documented closed-loop performance testing supports the HPV70-MA-R-21.

The supplied factory report identifies the unit as HPV70-MA-R-21, rated at 70 mL/rev, and records a test performed on September 14, 2026 at 26.8°C.

The record covers operating speed, pressure, flow, displacement, torque, input power, output power, overall efficiency and volumetric efficiency, with test points from roughly 5 MPa to 30.6 MPa.

Recorded Test Data

Performance values transcribed from the supplied closed-loop hydraulic pump test report for HPV70-MA-R-21 are given below.

Test Conditions

• Test Date: September 14, 2026
• Test Temperature: 26.8°C
• Rated Displacement: 70 mL/rev
• Rated Pressure: 35 MPa
• Maximum Pressure: 42 MPa
• Charge Pressure: 1.6 MPa
• Charge Flow: 21.9 L/min

The values above represent the documented factory test conditions. Actual operating performance may vary depending on hydraulic circuit configuration, fluid conditions, temperature and application conditions.

Engineering Drawing

HPV70 Engineering Drawing & Technical Documentation

Supporting the HPV70-MA-R-21 is engineering documentation that covers dimensional integration and hydraulic configuration.

The supplied engineering drawing identifies the control handle, maximum and zero displacement positions, hydraulic ports, leakage ports, oil suction port and pressure test point. It also provides shaft spline and control-handle information for mechanical integration.

Engineering Information Covered

• Overall mounting and dimensional information
• Control handle geometry
• Maximum displacement position
• Zero displacement position
• High-pressure ports A and B
• Leakage ports L1 and L2
• Oil suction port S
• Pressure test port M
• Servo cylinder pressure test point
• Input shaft spline configuration
• Control-handle spline information
• Pump rotation direction
• Control configuration information

The drawing also documents MA, EP and HS control configurations for the HPV series and identifies clockwise and counterclockwise rotation configurations.

Engineering Integration

Before system integration proceeds, the selected displacement, control method, rotation direction, shaft configuration and hydraulic port arrangement should be checked against the applicable engineering drawing and application requirements.

Project Reference

Documented Project Reference — Kyrgyzstan Cotton Harvester

The supplied project documentation references the HPV70-MA-R-21 in a variable piston pump project for Kyrgyzstan.

Project Details

The documented project specification identifies the HPV70 hydraulic pump with a maximum displacement of 70 mL/rev, a rated working pressure of 35 MPa, a continuous working pressure of 30 MPa and a transient maximum working pressure of 42 MPa.

This project reference is presented as documented application information from the supplied project materials.

Technical Documents

HPV70-MA-R-21 Technical Documents

For product evaluation, hydraulic system integration and model selection, supporting technical documentation is available.

Available Technical Information

• HPV70-MA-R-21 Technical Parameters
  Product operating parameters including displacement, speed, pressure, torque, power, temperature and weight.
• HPV70/90 Engineering Drawing
  Dimensional and configuration information covering mounting dimensions, hydraulic ports, leakage ports, shaft configuration, control handle and rotation direction.
• HPV70-MA-R-21 Factory Test Report
  Documented closed-loop performance test data including speed, pressure, flow, displacement, torque, input power, output power, overall efficiency and volumetric efficiency.
• HPV Series Technical Parameter Sheet
  Series-level technical information covering displacement classes, operating speed, pressure, torque, power, temperature and model configuration.

Technical Information Request

For OEM and hydraulic system integration projects, technical information can be reviewed according to the required displacement, operating pressure, speed, control method, rotation direction and mounting configuration.

FAQ of agricultural pumps:

Q:  Are you a manufacturer or trading company?

A:  We are a professional hydraulic pumps manufacturer.

Q: What is the MOQ?

A: 1pc is also OK.

Q: How long is your warranty?

A: All our products come with an one (1) year warranty.

Q: Which payment terms could you accept?

A: Payment Terms: T/T , Western Union or Cash .

Q: Does your company accept customization?

A: We have our own factory, and excellent design team, and we accept OEM.

Tags: Agricultural Pumps, Hydraulic Piston Pumps, Variable Displacment Piston Pumps