14500406 14557639 Main Relief Valve Control Valve Suction Valve for Excavator EC140 EC160B EC180B EC210 EC210B EC240B 290B 290C

14500406 14557639 Main Relief Valve Control Valve Suction Valve for Excavator EC140 EC160B EC180B EC210 EC210B EC240B 290B 290C

 Key attribute

Product profile

• Critical Overload Protection As the primary safety device in the hydraulic circuit, these relief valves limit maximum system pressure by diverting excess fluid to the return line when the set value is exceeded. This protects the main pump, hydraulic cylinders, and piping from damage under peak loads. A malfunctioning valve can cause erratic hydraulic functions, a noisy pump, or a system that fails to build adequate pressure.
• Precise Pressure Regulation Manufactured to meet stringent Volvoo standards, these valves ensure precise pressure control and prevent damage from over-pressurization-unlike a worn valve that may stick open or closed. The main relief valve also acts as a buffer during system pressure fluctuations, protecting sensitive components. 

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GVO Value

  Guangzhou GVO Precision Hydraulic Co., Ltd. is a professional manufacturer and exporter of hydraulic components, electrical systems, and engine parts for excavators. Founded in 2017 and headquartered in Guangzhou, China, we focus on reliable global delivery and customer satisfaction.

  We supply hydraulic pumps, gear pumps, relief valves, throttle motors, sensors, solenoid valves, regulators, wiring harnesses, and engine parts. Our products are compatible with major brands such as Komatsu, Catt, Kobelco, Hitachi, VoOlvo, Hyundai, Doosan, Sany, XCMG, JCB, and Case. With over 1,000 part numbers in stock, we maintain deep inventory to reduce waiting time and avoid unnecessary backorders. Every part is inspected and performance-tested before shipment.

  As a factory-direct supplier, we control quality and cost from raw material to finished product. Every part is inspected and performance-tested before shipment. We help customers confirm models, avoid wrong purchases, ship common parts fast, and provide after-sales support. No matter the order size, we treat everyone the same. Our products are exported to more than 30 countries and regions.

GVO — Precision Components. Global Supply. Trusted Partnership.