GVO 31QB-17730 Main Relief Valve Safety Valve for HX480L HX520L R360LC9 R380LC9SH R390LC9 Excavators

GVO 31QB-17730 Main Relief Valve Safety Valve for HX480L HX520L R360LC9 R380LC9SH R390LC9 Excavators

 Key attributes

Precise Pressure Control & Protection
  As the primary safety valve in the hydraulic system, it accurately controls and limits the maximum hydraulic system pressure, preventing it from exceeding safe thresholds. This effectively protects critical components such as the hydraulic pump, cylinders, and lines from costly damage caused by pressure spikes.

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

1.The pictures

2.The p/n

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GVO Company Overview  

  Guangzhou GVO Precision Hydraulic is a professional manufacturer and exporter of cost-effective hydraulic components and electrical systems for excavators. Based in Guangzhou, China, we are committed to delivering value through quality products, efficient service, and competitive pricing.Our main products include hydraulic pumps, gear pumps, pressure relief valves, throttle motors, and a complete range of electrical components. We cover most mainstream excavator brands and models, with full specifications and ample stock to meet customer demand.

  All components are precision-machined and inspected under strict quality control procedures. Our products feature high precision, excellent pressure resistance, superior sealing, and stable performance — effectively resolving common failures such as power shortage, hydraulic leaks, system vibration, and electrical problems.

  As a direct manufacturer, we eliminate middlemen and provide high-quality replacement parts with reliable compatibility, consistent durability, and affordable pricing.We support bulk orders, custom specifications, and efficient global delivery through mature production systems and comprehensive export logistics. Through stable quality and professional after-sales support, we have established long-term, mutually beneficial 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.

GVO — Value-Driven. Quality-Focused. Globally Connected.