GVO 702-21-57600 Hydraulic Pump Large Pump Proportional Solenoid Valve for Excavator PC300

Key attributes

Precise Proportional Control
The valve utilizes proportional solenoid technology, which allows for stepless, infinite adjustment of hydraulic flow and pressure based on the input current signal. This provides smooth, accurate control over all machine functions – from fine grading to heavy digging – without the abruptness of on/off switching.

If you need other relief valves, send us the related details please:

1.The pictures

2.The p/n

3.The size

GVO Company Overview

Guangzhou GVO Precision Hydraulic is a professional manufacturer and exporter dedicated to the research, development, and production of precision hydraulic components and electrical parts for excavators. Based in Guangzhou, China, we operate under strict quality control and compliance standards, ensuring that every product meets international requirements for performance, safety, and reliability.

We manufacture and supply hydraulic pumps, gear pumps, pressure relief valves, throttle motors, and a comprehensive range of electrical components. Our product range covers most mainstream excavator brands and models, with complete specifications and substantial inventory to ensure fast and efficient order fulfilment.

All components are precision-machined and inspected through a multi-stage quality control process. Our products are characterised by high precision, excellent pressure resistance, superior sealing performance, and stable operation — effectively resolving common mechanical failures such as power deficiency, hydraulic leakage, system jitter, and electrical malfunctions.

As a direct factory supplier, we eliminate intermediaries and offer high-quality replacement parts with reliable compatibility, consistent durability, and cost-effective pricing.With mature production systems, established export infrastructure, and a commitment to quality assurance, we support bulk orders, custom processing, and timely global delivery. Through our consistent quality standards and professional after-sales support, we have built lasting, trusted relationships with customers around the world.

Operational Capabilities

We maintain a comprehensive supply chain covering engine, hydraulic, electrical, sealing, bearing, and gear components for all major excavator brands. Our 40,000 m³ warehousing facility ensures extensive stock availability, enabling same-day dispatch and rapid order fulfilment.

Our team

GVO — Precision Components. Quality Assured. Globally Delivered.