HVME400-080000 Hydraulic Main Control Valve Secondary Relief Valve Overload Valve Safety Valve for Excavator SY485 Valve Parts

Key attributes

Precise & Fast Overload Protection

• Circuit-Specific Safety: The valve limits the maximum pressure in specific circuits (e.g., boom, arm, bucket). If a pressure spike occurs in one of these circuits, the valve opens instantly to relieve excess pressure.

• Prevents Costly Damage: This rapid response protects expensive components like cylinders, hydraulic motors, and the main pump from catastrophic failure due to overloading.

• Direct-Acting Design: The valve uses a poppet-type, direct-acting design, which ensures very fast opening and closing times for immediate protection.

Integrated Anti-Cavitation Protection

• Prevents Vacuum Damage: The valve incorporates a built-in check valve that provides anti-cavitation protection. When the actuator suddenly stops, this function supplies oil to prevent damaging vacuum conditions.

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About GVO-Who We Are

GVO is a professional excavator parts manufacturer with over 15 years of experience. We are driven by a people-first philosophy and a relentless commitment to quality.

Our supply chain covers engine, hydraulic, electrical, sealing, bearing, and gear components for all major brands — Komatsu, CAT, Kobelco, Hitachi, Volvoo, Hyundai, Doosan, Sany, XCMG, and more.

We serve wholesalers, dealers, construction teams, and individual owners across domestic and international markets. Every order, big or small, gets the same attention and care.

Our Mission – Deliver the right part, at the right price, in the fastest way possible. Quality is not just a goal — it's our lifelong pursuit.