Compatible With Rexroth Hydraulic Pump Servo Control Valve A4VG Series For Mining Dump Truck

Product Introduction

This hydraulic pump control valve is a closed - loop hydraulic servo valve for Rexroth A4VG series swashplate axial piston pumps. It integrates pressure cut - off, flow regulation, load feedback and other functions, adopting pilot hydraulic control. With a rated pressure of 400bar and a peak pressure of 450bar, it can steplessly adjust displacement from 0 to Vgmax, accurately matching pump operating conditions, providing stable pressure and flow for hydrostatic transmission and suitable for heavy - duty high - pressure working scenarios.

Product Summary

Hydraulic valves serve as the "command center" of a hydraulic system. They regulate the direction, pressure, and flow of the hydraulic fluid, ensuring that actuators like cylinders and motors operate precisely as required.
Functionally, they are divided into three primary groups: directional, pressure, and flow control valves. Additionally, specialized and combination valves are available for specific applications.

Product Parameters

Product Features

This series of pump control valve has load feedback control, with a response time of ≤100ms and low energy consumption. The integrated design reduces pipeline connections and leakage risks. It is 100% compatible with original A4VG pumps for easy installation. It has strong anti - pollution ability and is suitable for ISO 46 anti - wear hydraulic oil. The ductile iron valve body is high - pressure and wear - resistant, and the alloy spring has a long fatigue life with low maintenance cost.

Product Application

This pump control valve is mainly applicable to construction machinery (excavators, crawler cranes, concrete pump trucks), mining machinery (roadheaders, mining dump trucks), agricultural machinery (large tractors, combine harvesters) and heavy - duty vehicle hydraulic systems. It is especially ideal for closed - loop, high - pressure heavy - duty and variable - condition hydrostatic transmission to ensure efficient and stable equipment operation.

Troubleshooting

1. No displacement adjustment: Check pilot pressure and clean valve core impurities.

2. Abnormal pressure: Recalibrate the servo valve and replace the aged spring.

3. Excessive leakage: Replace FKM seals and check the valve body fit clearance.

4. Slow response: Filter hydraulic oil to ISO 19/17/14 class.

5. Abnormal noise: Troubleshoot air in the oil circuit and tighten loose joints.

Company Profile

Hebei Runhe Hydraulic Co., Ltd. is a leading manufacturer and exporter of hydraulic products with 12 years of experience. We provide a wide selection of hydraulic pumps and control valves, including the A6VG series. We also offer replacement pumps compatible with Parker, Rexroth, and other international brands, plus custom hydraulic cylinders.

We welcome global inquiries and are committed to providing high‑quality products and excellent service. Contact us today!