GVO Auxiliary Relief Valve Pressure Relief Valve Distributor Check Valve SY65

Product Specification

GVO Auxiliary Relief Valve Pressure Relief Valve Distributor Check Valve SY65 75C-9 LG75 XG75 Excavator Parts

Product Description

The GVO excavator relief valve, compatible with Hitachi excavators, is a key pressure control valve in the hydraulic system. It regulates hydraulic pressure, releases overload pressure, protects core hydraulic components such as the main valve and hydraulic pump, and ensures stable operation of the entire machine.

This relief valve is precision-machined from high-quality steel and undergoes overall quenching treatment. Equipped with oil-resistant and high-pressure-resistant seals, it boasts excellent sealing performance, impact resistance, and wear resistance. Suitable for the high-pressure hydraulic conditions of excavators, it effectively prevents internal leakage, pressure loss, operational instability, and vibration.

Product Introduction

This GVO threaded cartridge main relief valve is a universal pressure protection accessory for the main control valve of mainstream domestic 7-ton mini excavators. It is perfectly compatible with four models: the classic and popular SY65 and SY75C-9 mini excavators, the LG75 heavy-duty mini excavator, and the new XG75 mini excavator. It is precisely replicated 1:1 according to the original factory specifications for thread pitch, valve body length, spring stroke, and valve seat sealing dimensions. The valve bore specifications are consistent across all four domestic models, allowing for direct interchangeability. It serves as a crucial overload relief safety barrier for the hydraulic system of domestic mini excavators.

The entire valve body is CNC precision machined from high-grade alloy structural steel, completely eliminating the inherent defects of cheap aftermarket ordinary carbon steel valve bodies, such as easy deformation under high pressure, thread stripping under pressure, and susceptibility to corrosion after long-term oil immersion.

The valve seat sealing face and valve core guide surface undergo high-precision internal honing and mirror polishing, achieving a micron-level sealing fit between the valve core and seat. This minimizes internal oil leakage under high-pressure conditions, fundamentally resolving common industry shortcomings such as pressure regulation drift, insecure locking, and weak or ineffective pressure relief under heavy loads.

The core pressure relief spring is made of high-fatigue-resistance alloy spring steel, cold-rolled and then tempered and stress-relieved at high temperatures. It exhibits excellent resistance to tens of thousands of high-frequency reciprocating compression cycles. Even under the harsh conditions of thousands of daily digging impacts from mini excavators and continuous high-temperature immersion in hydraulic oil, it will not experience spring collapse, elasticity decay, or gradual pressure drop. The top pressure regulating outlet plug is made of tempered alloy steel with a double-hole flow guide design, ensuring smooth hydraulic oil flow without throttling resistance and effectively reducing hydraulic water hammer impact and abnormal oil temperature rise caused by turbulent flow.

Packaging & Shipping

We use high-strength, environmentally friendly paper export packaging, which is reinforced, cushioned, and moisture-proof, suitable for long-distance international logistics transportation, and meets cross-border freight and environmental protection standards. International transportation adopts formal cross-border logistics, with full tracking of logistics information and supporting customs clearance documents to ensure smooth customs clearance and timely delivery of goods overseas.

Company Introduction

The GVO brand is a manufacturer of hydraulic components. We mainly produce the most comprehensive range of pilot pumps, gear pumps, relief valves, hydraulic pumps, electrical components, hydraulic parts, engine assemblies, traveling assemblies, rotating assemblies, distribution valves, and other components.

We are factory direct sellers without any middlemen profiting from price differences. The quality is definitely the best for you because we are the ones who produce them. We cannot tarnish our reputation. The prices are also the most favorable for you. There is a stable delivery speed.

We value every customer and provide you with the best service. We offer pre-sale, in-sale, and after-sale guarantees. Any problems will definitely be resolved for you. We are always available to serve you.