GVO 723-40-90200 Main Hydraulic Control Valve Pressure Relief Valve Safety Valve

Product Specification

GVO 723-40-90200 Main Hydraulic Control Valve Pressure Relief Valve Safety Valve PC200-7 PC220-7 PC200-8 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 GVO cartridge-type main relief valve is a core pressure protection component for hydraulic systems, developed with strict adherence to Komatsu's original valve structure, pressure parameters, and installation dimensions. It is precisely compatible with three mainstream 20-ton excavators: the PC200-7, PC220-7 classic mechanical hydraulic model, and the PC200-8 electronically upgraded version. As a built-in main pressure regulating safety valve within a multi-way distribution valve, it fulfills three core functions: limiting the maximum pressure of the entire machine's hydraulic system, providing pressure relief during heavy-load instantaneous overload, and maintaining pressure under continuous load.

The complete multi-layer sealing structure is deeply adapted to the harsh operating environments of excavators, including high-temperature engine compartments, dusty work sites, mud and water corrosion, high-frequency vibration, and fluctuating temperature differences. Considering the long-term shift work characteristics of these three models, it has undergone comprehensive upgrades in high-temperature resistance, leak prevention, vibration resistance, and rust and corrosion prevention.

The upper valve core guide sliding position of the valve body is equipped with a high-temperature resistant fluororubber combination sealing ring, which can resist the corrosion of high-temperature oil in the closed engine compartment in summer and the hardening, cracking and permanent deformation failure of the sealing ring caused by repeated rise and fall of oil temperature; the middle section of the valve body has two stepped independent sealing grooves with thickened oil-resistant nitrile O-rings, forming a double seal to completely prevent high-pressure hydraulic oil from leaking from the joint surface between the valve body and the distribution valve. Even if the vehicle is continuously operating under rough conditions such as muddy construction sites, dusty quarries and untimely hydraulic oil maintenance during the rainy season, there will be no problem of oil leakage from the valve body or thread gaps.

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.