GVO YB60000922 Excavator ZX120-5B ZX130-5A ZX140W-5B Main Relief Valve Pressure Relief Valve and Safety Valve

GVO YB60000922 Excavator ZX120-5B ZX130-5A ZX140W-5B Main Relief Valve Pressure Relief Valve and Safety Valve

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 threaded cartridge relief valve is specifically designed for use with the multi-way main control valves of the ZX120-5B, ZX130-5A tracked excavators and ZX140W-5B wheeled excavators. It is a core hydraulic wear component in the overall machine's hydraulic control system, responsible for controlling the upper pressure limit and implementing overload protection. These three types of small and medium-sized engineering equipment are highly versatile, with wheeled excavators offering the advantage of flexible relocation. They are frequently used in urban road reconstruction, residential earthwork leveling, municipal pipeline excavation, farmland irrigation construction, factory infrastructure, and short-distance earthwork transportation. Wheeled models are particularly suitable for paved roads and narrow urban construction sites.

The relief valve body is integrally forged from high-quality alloy steel, eliminating the need for ordinary sand castings and avoiding inherent defects such as porosity, sand holes, and loose material in castings. Key components like the valve core and seat, which are subjected to long-term pressure and reciprocating sliding motion, undergo a dual heat treatment process of quenching hardening and surface carburizing hardening. This results in sufficient surface hardness, excellent wear resistance, and impact resistance, effectively resisting abrasive wear from iron filings and hard impurities within the hydraulic oil, thus extending the overall service life of the relief valve.

The valve core mating parts are meticulously ground using high-precision CNC grinding equipment. Strict control of the scientifically reasonable assembly clearance between the valve core and valve sleeve ensures smooth and sensitive valve core opening and resetting, reducing the probability of troublesome malfunctions such as valve core jamming and return-to-position stuckness. The central hexagonal locking structure is thickened and reinforced, ensuring even force distribution on the wrench during maintenance and disassembly, preventing slippage and edge damage. Multiple sealing points are equipped with O-rings that are resistant to high temperatures, hydraulic oil corrosion, and aging, providing a multi-layered sealing structure to prevent dust and metal impurities from entering the valve core's working area.

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.