GVO 4372683 Main Relief Valve Pressure Relief Valve Hydraulic Safety Valve EX120

Product Specification

GVO 4372683 Main Relief Valve Pressure Relief Valve Hydraulic Safety Valve EX120-2 EX130-5 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 for the core hydraulic wear parts of Hitachi's classic 12/13 ton excavators, this product perfectly adapts to the main inlet valve bore of the EX120-2 and EX130-5 distribution valves. The threads, oil passages, and seals are replicated 1:1 from the original parts, eliminating the need for grinding or modification during repairs and significantly reducing equipment downtime for maintenance.

1. Comprehensive Hydraulic Protection: Limits the maximum hydraulic working pressure of the entire excavator. In cases of excessive load during hard soil or rock excavation, instantaneous pressure relief protects all core hydraulic components, including the main hydraulic pump, distribution valves, cylinders, and travel motor, preventing high-pressure burst damage and significantly reducing high overhaul costs.

2. High-Strength, Wear-Resistant, and Long-Lasting Structure:The valve body is integrally hardened and reinforced, resisting impact and oil corrosion. The pressure regulating spring is high-temperature resistant and fatigue-resistant, preventing softening and failure in long-term high-temperature hydraulic oil environments. This addresses common problems such as weak power, sluggish operation, fluctuating pressure, and rapid oil temperature rise.

3.Versatile for Multiple Construction Scenarios: Adaptable to all scenarios including earthwork excavation, road breaking, building demolition, and river dredging. It is a frequently used core hydraulic component in the maintenance of Hitachi EX120/EX130 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.