GVO RD55170210 Excavator KX057-4 U55 U55-4 Main Relief Valve Pressure Relief Valve Hydraulic Safety Valve

GVO RD55170210 Excavator KX057-4 U55 U55-4 Main Relief Valve Pressure Relief Valve Hydraulic Safety Valve

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 model 923G1 4V28-0 cartridge relief valve is specifically designed for Kubota KX057-4, U55, and U55-4 mini excavators, serving as a core component for pressure stabilization and overload buffering protection in the machine's hydraulic system.

The valve body is forged from high-strength alloy steel and temper-hardened, with a precision-polished surface for rust and wear resistance, capable of withstanding high-pressure impacts over extended periods. The internal valve core undergoes micron-level mirror grinding and is fitted with oil-resistant and aging-resistant fluororubber seals, preventing valve core jamming, internal oil leakage, and pressure drop under dusty and muddy conditions such as landscaping, indoor demolition, and farmland reclamation. When the operating load exceeds limits, the valve provides instantaneous pressure relief and buffering, reducing high-pressure impacts and comprehensively protecting the hydraulic pump, multi-way distribution valve, and boom and arm cylinders. It effectively resolves high-frequency faults in KX057-4, U55, and U55-4 excavators, such as weak digging power, engine stalling, boom sinking, vibration, excessively high hydraulic oil temperature, and system pressure drift.

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.