GVO 702-21-57400 702-21-57900 702-21-55901 Proportional Solenoid Valve for Excavator PC200-7-8 PC220-7 PC220-8 D155AX-6 D475A-5

GVO 702-21-57400 702-21-57900 702-21-55901 Proportional Solenoid Valve for Excavator PC200-7-8 PC220-7 PC220-8 D155AX-6 D475A-5

 Key attributes

Heavy-Duty Construction & Durability
  The valve body is made of high-strength steel with corrosion-resistant plating, while the solenoid coil uses high-temperature, oil-resistant materials rated for continuous operation in harsh environments. The wiring harness is protected by a braided, abrasion-resistant sleeve, and the connector ensures a secure, water-resistant fit to prevent signal loss or intermittent faults. Designed to withstand vibration, temperature fluctuations, and exposure to dust, water, and hydraulic oil common on construction sites, the valve maintains consistent performance over a long service life.

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

1.The pictures

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GVO Company Overview  

  Guangzhou GVO Precision Hydraulic is a professional manufacturer and exporter dedicated to providing supply chain security through reliable hydraulic components and electrical parts for excavators. From our operations in Guangzhou, China, we ensure that our customers have access to the parts they need, when they need them — supported by robust inventory management and efficient logistics.

  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 ample stock to meet customer requirements.

  All components are precision-engineered and inspected under standardized 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 offer high-quality replacement parts with guaranteed compatibility, proven durability, and competitive pricing, with no intermediary markups.

 With mature production systems, robust export logistics, and a focus on supply chain security, we support bulk orders, custom specifications, and timely global delivery. Through consistent quality and responsive after-sales support, we have cultivated enduring, trust-based relationships with customers worldwide.

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 — Supply Chain Security. Reliable Supply. Global Trust.