4372682 4372683 9200489 Auxiliary Relief Valve Pressure Relief Valve Safety

Product Specification

4372682 4372683 9200489 Auxiliary Relief Valve Pressure Relief Valve Safety Valve EX100-5 EX120-5 ZX110 ZX120 ZX160 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

Developed specifically to address the vulnerability of single-circuit hydraulic systems in Hitachi 11-16 ton medium excavators, this product perfectly adapts to the mounting positions of the ZX110, ZX120, and ZX160 distribution valves. Threads, oil passages, and seals are 1:1 replicas of original parts, eliminating the need for valve body modifications during maintenance and disassembly, significantly reducing equipment downtime for repairs.

1. Independent Pressure Protection for Each Branch Circuit: Independently controls the maximum working pressure of the boom, stick, and breaker hydraulic circuits. In case of overload during excavation of hard soil or rock, it provides instantaneous pressure relief, protecting the corresponding cylinders and motors and preventing high-pressure burst damage in a single branch circuit, significantly reducing the cost of localized hydraulic overhauls.

2. High-Strength, Wear-Resistant, and Long-Lasting Structure: The valve body is integrally hardened and reinforced, resisting impact and hydraulic oil corrosion. The pressure regulating spring is high-temperature resistant and fatigue-resistant, and is less prone to softening and failure in long-term high-temperature hydraulic oil environments. This fundamentally improves common excavator problems such as weak single-action operation, jamming, vibration, and abnormal oil temperature rise.

3. Versatile for Multiple Construction Scenarios: Adaptable to all scenarios including earthwork excavation, road breaking, building demolition, and river dredging. It can be used as a standard overload valve or specifically fitted to the breaker hydraulic circuit. It is a frequently used maintenance part for Hitachi ZX110/ZX120/ZX160 series excavators.

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.