GVO 0412207 Main Relief Valve Pressure Relief Valve Hydraulic Pump Valve EX100-3

Product Specification

GVO 0412207 Main Relief Valve Pressure Relief Valve Hydraulic Pump Valve EX100-3 EX100-5 EX120-2 EX120-3 EX120-5 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

This is the main relief valve (main pump), specifically designed for use with the hydraulic main circuit of Hitachi EX100-3 and EX100-5 models. It controls the total output pressure of the main pump for the entire machine. The bottom adjusting nut allows for precise calibration of the system's standard pressure, fully matching the original factory hydraulic settings.

1. Comprehensive Pressure Protection: Controls the total peak hydraulic pressure of the entire excavator. During overload excavation of hard soil and rock, it provides instantaneous pressure relief, protecting all core hydraulic components, including the main hydraulic pump, distribution valves, cylinders, and motors, preventing high-pressure bursts and significantly reducing the cost of major overhauls.

2. High-Strength, Wear-Resistant, and Long-Lasting Structure: The valve body is integrally hardened and reinforced, making it impact-resistant and wear-resistant. 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 lack of power, sluggish operation, fluctuating pressure, and soaring oil temperature.

3. Multi-Condition Adaptability: Suitable for all scenarios including earthwork excavation, road breaking, demolition, and farmland reclamation. It is the most commonly used core hydraulic component in Hitachi EX100 series excavator maintenance.

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.