723-40-91200 723-90-61700 723-10-12300 Auxiliary Relief Valve Pressure Relief

Product Specification

723-40-91200 723-90-61700 723-10-12300 Auxiliary Relief Valve Pressure Relief Valve D375A-6 D375A-8 PC200-7 PC220-7 Excavator

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 high-precision hydraulic relief valve is a universal model for multiple Komatsu construction machinery models, precisely compatible with two main equipment categories: the D375A-6 and D375A-8 large bulldozers, and the PC200-7 and PC220-7 classic seventh-generation excavators. It is a core pressure protection valve in the hydraulic main control system, often referred to in the industry as the distributor's main valve, overload safety valve, or pressure regulating valve.

The valve body base material is made of high-alloy structural steel integral forging blank, and after one-piece molding, it undergoes dual strengthening through tempering heat treatment and surface high-frequency quenching. This maximizes the overall structural rigidity, and the valve body hardness meets stringent heavy-duty standards, enabling it to withstand long-term instantaneous high-pressure impacts, high-temperature hydraulic oil corrosion, and oil impurities without causing fatal problems such as valve body cracking, thread stripping, or body deformation.

The valve core and valve seat adopt a double-end face ultra-precision grinding and matching process, and the sealing cone surface is mirror honed. The micron-level fit gap completely eliminates high pressure internal leakage and pressure drop when the engine is hot. The internal pressure spring is made of high temperature resistant chromium vanadium alloy spring steel. After tens of thousands of fatigue reciprocating opening and closing tests, the elastic force decay rate is extremely low, and the starting pressure remains constant during long-term high-intensity operation.

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.