GVO 723-40-51102 723-40-51100 723-40-91100 91102 Main Relief Valve Pressure

Product Specification

GVO 723-40-51102 723-40-51100 723-40-91100 91102 Main Relief Valve Pressure Relief Valve PC200-6 PC200-7 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 custom-designed hydraulic main control valve accessory for the classic Komatsu PC200-6 and PC200-7 models. It is a core pressure protection component in the excavator's hydraulic control system, directly installed inside the main control valve block, playing a crucial role in limiting pressure, relieving overload pressure, and stabilizing system pressure in the entire hydraulic main circuit.

The valve body is forged from a single high-purity 40Cr alloy steel blank, overcoming the shortcomings of ordinary castings that are prone to sand holes and high-pressure cracking. It is precision-machined in one piece on a CNC lathe. The internal valve core and seat mating surfaces are treated with high-precision external cylindrical grinding and internal honing processes, controlling the mating clearance to the micron level to eliminate high-pressure internal leakage problems.

The valve stem surface undergoes vacuum carburizing, quenching, and low-temperature tempering, achieving a surface hardness of HRC58-62, providing excellent resistance to impact, hydraulic oil erosion, and wear from impurity particles.

The external adjusting nut and locking hexagonal nut are made of high-strength tempered steel, with thread rolling to prevent stripping. They remain securely locked even after multiple pressure adjustments, preventing pressure shift during 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.