723-20-64400 Auxiliary Valve Pressure Relief Valve Hydraulic Safety Valve PC40 PC56 PC78MR PC78US PC78UU PC88MR Excavator Parts

723-20-64400 Auxiliary Valve Pressure Relief Valve Hydraulic Safety Valve PC40 PC56 PC78MR PC78US PC78UU PC88MR Excavator Parts

Product Description

The GVO excavator relief valve, compatible with PC40 PC56 PC78MR 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 overflow valve, designed for PC40, PC56, and PC78MR small excavators, is an integral core pressure control component within the main control distribution valve. It plays a crucial role in limiting the maximum working pressure of the entire hydraulic system, providing a solid and reliable overload protection line for the entire hydraulic circuit.

The valve body is made of high-strength alloy steel and is formed through a single forging process. It undergoes strict quenching and tempering treatment, ensuring sufficient mechanical strength of the valve body and excellent resistance to impact and erosion. It can withstand the repeated erosion of high-pressure hydraulic oil under the frequent operation of small excavators.The valve core and valve seat are manufactured using high-precision matching grinding technology, achieving a precise gap of micrometers. This ensures both a sensitive and rapid response for overloading conditions and a tight closure during normal operation, minimizing internal leakage and avoiding unnecessary power loss due to abnormal overflow.The working surface of the valve core is strengthened for wear resistance, capable of withstanding the erosion and scratching caused by metal impurities in the hydraulic oil. This significantly reduces the probability of valve core sticking and effectively extends the actual service life of the component. The entire sealing kit uses high-quality sealing gaskets resistant to high pressure and hydraulic oil corrosion, suitable for a wide range of working temperatures of small excavators. They do not soften or age in high-temperature environments and do not become brittle and crack in low-temperature conditions. This completely eliminates the problem of oil leakage from the valve body and internal oil leakage, perfectly adapting to the harsh working conditions with large dust and inconsistent hydraulic oil quality on construction sites.

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.