GVO 553-5199 Auxiliary Relief Valve Control Valve Pressure Relief Valve

Product Specification

GVO 553-5199 Auxiliary Relief Valve Control Valve Pressure Relief Valve Hydraulic Safety Valve E345GC E349GC 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

The GVO relief valve is compatible with the hydraulic systems of E345GC and E349GC next-generation medium and large excavators. It is a key pressure protection and control valve within the distribution valve system. Precision-machined according to strict structural parameters, its thread size, orifice distribution, valve core stroke, and set opening pressure are highly consistent with original parts. It supports direct cartridge-type non-destructive replacement, eliminating the need to modify the valve block during maintenance and effectively shortening equipment downtime for repairs.

The valve body's built-in pressure regulating spring is made of high-temperature resistant, fatigue-resistant alloy spring steel. It can withstand long-term reciprocating oil pressure impacts without easily experiencing elasticity decay or deformation. It maintains a stable pressure regulation range even after long-term service, preventing potential problems such as pressure drift and uncontrolled pressure leakage in the later stages of equipment operation.

It is equipped with high-pressure resistant fluororubber sealing components, which can resist high-temperature hydraulic oil corrosion for a long time, eliminating problems such as oil leakage from the valve body and aging seals. At the same time, the internal flow channel has been optimized to improve the valve's anti-contamination performance, reducing the probability of valve core jamming and sudden valve failure caused by hydraulic oil impurities, reducing the risk of unexpected equipment downtime, and ensuring uninterrupted construction of projects.

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.