GVO 60310755 Auxiliary Relief Valve Pressure Relief Valve Distributor Hydraulic

Product Specification

GVO 60310755 Auxiliary Relief Valve Pressure Relief Valve Distributor Hydraulic Check Valve SY75 SY75C 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 dedicated distribution valve and main pressure protection valve for the classic 7-ton mini excavators SY75 and SY75C from Sany. It is strictly replicated according to Sany's original valve bore thread specifications, insertion depth, valve core stroke, and pressure relief opening pressure. It is completely interchangeable between the two models and is an indispensable core component for overload safety pressure relief in the hydraulic system of Sany's 75 series mini excavators.

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

The valve core, valve sleeve, and sealing port all undergo high-precision internal honing and mirror-finish sealing grinding. The fit between the valve core and valve seat achieves micron-level tolerance, minimizing internal oil leakage under high-pressure conditions. This fundamentally solves common industry shortcomings such as pressure regulation drift, unstable locking, and weak or ineffective pressure relief under heavy loads.

The internal pressure relief spring is made of high-fatigue, high-temperature resistant alloy spring steel wire, and undergoes high-temperature tempering stress-relief treatment. It can withstand thousands of daily excavation impacts and long-term immersion in high-temperature hydraulic oil without spring fatigue, collapse, or gradual pressure drop. The top pressure-adjusting external thread is a standard metric thread, paired with a thickened hexagonal adjusting lock nut. When maintenance personnel adjust the pressure with a wrench and lock the position, the force is evenly distributed, preventing the nut's edges from becoming rounded and slipping, or pressure loss and lockout after adjustment.

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.