702-77-02120 702-77-02150 702-77-02160 Rotary Motor Relief Valve Pressure Relief

Product Specification

702-77-02120 702-77-02150 702-77-02160 Rotary Motor Relief Valve Pressure Relief Valve Safety Valve PC300 PC400 Excavator Parts

Product Description

The GVO excavator relief valve, compatible with PC300 PC400 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 PC300 and PC400 excavators, is the main pressure safety valve at the core of the multi-way distribution valve assembly. It is also known as the main gun in the maintenance industry, responsible for controlling the maximum working pressure of the entire hydraulic system. It directly determines the output power of the excavation, the smoothness of compound actions, and the safe and stable operation of the entire hydraulic circuit.

The valve body base material is made of high-quality high-strength alloy steel, which is processed into shape through a high-precision CNC lathe. The core components such as the valve core and valve seat undergo quenching and heat treatment as well as ultra-precise mirror surface grinding technology, significantly enhancing the surface hardness of the parts and strengthening the anti-wear and anti-fracture performance. This can effectively resist abrasive wear caused by internal impurities in the hydraulic oil and reduce the occurrence probability of valve core sticking, seal surface scratching, etc. The valve is equipped with a high-performance sealing kit that is resistant to high pressure and oil temperature aging, which can adapt to the drastic oil temperature fluctuations caused by long-term continuous heavy-load operations of medium and large-tonnage excavators. Under repeated pressure shock conditions, it can effectively prevent external leakage of oil, internal pressure relief, and pressure fluctuation problems.

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.