365P718112 SA8230-36590 14552974 Auxiliary Relief Valve Control Valve EC330B

Product Specification

365P718112 SA8230-36590 14552974 Auxiliary Relief Valve Control Valve EC330B EC340B EC360B EC380 SY365 SY385 SY465 Excavator

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

The GVO relief valve is compatible with multiple mainstream medium and large excavators, including the EC330B, EC340B, EC360B, EC380, and Sany SY365, SY385, and SY465 models. It is a core pressure protection component of the hydraulic distribution valve. The product is precisely machined according to strict benchmarking data, ensuring that thread specifications, oil hole positions, valve core stroke, and rated opening pressure are consistent with original parts. It supports direct cartridge replacement, eliminating the need to modify the distribution valve orifice during maintenance and significantly reducing equipment downtime for repairs.

The valve body is forged from high-strength alloy steel, and the valve core friction pair undergoes carburizing, quenching, hardening, and high-precision honing processes to precisely control the fitting clearance. This effectively reduces internal leakage under high-pressure, high-flow continuous operation, stably maintaining the hydraulic system's set oil pressure. It effectively solves common problems in this model, such as pressure drop under heavy load, weak digging power, slow boom lifting, overflow noise, jamming during complex movements, and stalling under heavy load. It is widely applicable to various heavy-duty operation scenarios, including earthmoving, quarrying, mining stripping, and infrastructure construction, continuously ensuring stable power output for the entire machine.

This overflow valve has been optimized and upgraded for complex working conditions. The internal pressure regulating spring is made of high-temperature resistant, high-toughness alloy spring steel, which withstands repeated oil pressure impacts over long periods without easily experiencing elasticity decay or plastic deformation. This prevents pressure drift and uncontrolled pressure release over long-term use. The valve is equipped with high-performance, oil-resistant, high-pressure sealing components to resist high-temperature hydraulic oil corrosion and prevent external oil leakage and seal aging.

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.