700-90-74001 702-77-02120 Rotary Motor Relief Valve Pressure Relief Valve Safety Valve PC300-3 PC300-7 PC350-7 Excavator Parts

700-90-74001 702-77-02120 Rotary Motor Relief Valve Pressure Relief Valve Safety Valve PC300-3 PC300-7 PC350-7 Excavator Parts

Product Description

The GVO excavator relief valve, compatible with PC300-3 PC300-7 PC350-7 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 use with PC300-3, PC300-7, and PC350-7 excavators, is a crucial main safety valve within the multi-way distribution valve assembly. It is also known in the maintenance industry as the main gun, responsible for controlling the maximum working pressure of the entire hydraulic system of the machine. It directly determines the power of the excavation, the smoothness of compound actions, and the safety of the entire hydraulic circuit operation.

The valve body base material is made of high-toughness and high-strength alloy steel. It is formed through a single-piece processing by a high-precision CNC lathe. The core mating pair of the valve core and valve seat undergoes quenching and heat treatment as well as ultra-precision mirror polishing processes, effectively enhancing the surface hardness of the parts, improving the anti-wear and anti-fracture performance, and being able to resist abrasive wear caused by impurity particles in the hydraulic oil, reducing the probability of valve core sticking, seal surface scratching, etc. The valve components are equipped with high-quality sealing components that are resistant to high pressure and high/low temperature aging, which can adapt to the significant temperature fluctuations caused by long-term continuous heavy-load operations of medium-sized and large excavators. In high-frequency pressure shock conditions, it effectively prevents external leakage of oil from the valve body, internal pressure leakage, and pressure surge from flowing inwards.

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.