GVO 702-21-62200 702-21-62900 Hydraulic Pump Large Pump Proportional Solenoid Valve for Excavator PC300 PC350 PC400 PC450

GVO 702-21-62200 702-21-62900 Hydraulic Pump Large Pump Proportional Solenoid Valve for Excavator PC300 PC350 PC400 PC450

 Key attributes

System Protection & Fuel Efficiency
  By matching pump output to engine load and operator demand, the valve prevents unnecessary hydraulic pressure spikes and flow waste. This optimizes fuel efficiency, reduces engine load, and protects the main pump and other hydraulic components from premature wear. It also plays a key role in safety systems such as travel speed shifting and hydraulic lockout – for example, when the operator switches between high and low travel speeds, the valve adjusts pilot pressure to the travel motor's shifting valve, ensuring smooth transitions without jolts or loss of traction.

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 specializing in collaborative partnership solutions for hydraulic and electrical components in the excavator industry. From our headquarters in Guangzhou, China, we work alongside our customers as strategic partners — understanding their needs, anticipating their challenges, and delivering solutions that support their long-term success.

  We produce hydraulic pumps, gear pumps, pressure relief valves, throttle motors, and a full series of electrical components. Our product range covers most mainstream excavator brands and models, with complete specifications and substantial inventory to meet diverse customer requirements.

  All components are precision-engineered and inspected under strict quality control procedures. Our products deliver high precision, excellent pressure resistance, superior sealing, and stable performance — effectively preventing common issues such as power loss, hydraulic leakage, system vibration, and electrical faults.

  As a direct factory supplier, we provide high-quality replacement parts with reliable compatibility, proven durability, and competitive pricing, without intermediary involvement.

  With mature production systems, robust export logistics, and a collaborative approach to customer relationships, we support bulk orders, custom specifications, and efficient global delivery. Through consistent quality and dedicated partnership, we have cultivated long-term, trust-based 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 — Collaborative Partnership. Reliable Solutions. Global Trust.