GVO 708-2L-04531 Hydraulic PC Valve Pressure Relief Valve Safety Valve PC200-6

Product Specification

GVO 708-2L-04531 Hydraulic PC Valve Pressure Relief Valve Safety Valve PC200-6 PC220-6 PC230-6 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 high-precision multi-stage cartridge-type relief valve is specifically designed for Komatsu's classic sixth-generation 20-ton main excavator, fully compatible with the widely used PC200-6, PC220-6, and PC230-6 models. As the core main relief valve of the main control distribution valve, it undertakes three core functions: pressure stabilization of the entire machine's hydraulic system, peak overload pressure relief, and oil circuit overpressure safety protection. It is the most critical hydraulic wear replacement part for repairing power loss and abnormal operation in sixth-generation Komatsu excavators.

The product is strictly replicated according to the original factory valve parts through 3D measurement scanning and 1:1 mold making. The total insertion length of the valve body, the positioning dimensions of the multi-stage stepped sealing groove, the arrangement of the radial pressure relief oil holes, the external thread pitch and engagement length, and the structure of the tail pressure adjusting screw and locking nut are all completely aligned with the original machine parts standard, perfectly matching the valve hole installation benchmark of the distribution valves of the three models.

The repair and replacement process requires no modification to the valve block, such as boring, reaming, grinding the valve seat, or adding adjusting copper shims. Repair technicians can directly screw it into the original position and tighten it to complete the assembly, greatly reducing the difficulty of repairing old construction machinery and effectively shortening downtime for equipment failures at earthmoving sites and mining yards. It has extremely high practical value for urgent project repairs, refurbishment of used excavators, and rapid repair of rented equipment.

The valve body is integrally formed from a 40Cr alloy steel forged blank, abandoning the low-cost machining solution of simple turning of ordinary solid round steel commonly found on the market. The internal metallographic structure is dense and uniform, free of porosity and internal stress defects, enabling it to withstand long-term heavy-duty excavation of hard rock pressure, full-load combined action impacts, and instantaneous high-pressure impacts during sudden stops. This fundamentally prevents stubborn faults such as high-pressure cracking of the valve body, thread stripping, and internal oil passage deformation and leakage under long-term high-intensity shifts, making it highly suitable for the harsh working conditions of Komatsu 6th generation excavators operating continuously under heavy loads in all weather conditions.

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.