GVO 5540482300 Pilot Valve Cartridge Type Pressure Relief Valve Solar Valve 5540

Product Specification

GVO 5540482300 Pilot Valve Cartridge Type Pressure Relief Valve Solar Valve 5540 4823 00 Excavator Parts

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

This cartridge relief valve, part number 5540482300, is a standard pressure protection cartridge valve for hydraulic systems in construction machinery. It conforms to the RPEC-LAN structure and is widely compatible with various imported mini excavators, wheeled excavators, loaders, aerial work platforms, and hydraulic units in construction machinery. As the main relief valve integrated into the main control valve block, it performs the core functions of limiting the maximum pressure of the hydraulic system, overload relief, and maintaining constant pressure. It directly determines the excavation output, response speed, and smoothness of complex operations. Simultaneously, it provides overpressure protection for high-value core components such as the hydraulic main pump, cylinders, travel motor, and hydraulic lines, preventing component breakage and damage to internal precision structures due to overload operation.

The entire relief valve core assembly is CNC precision machined from a high-toughness solid alloy structural steel bar. The valve core's mating surfaces undergo centerless grinding and secondary mirror polishing, ensuring micron-level precision control of coaxiality, roundness, and radial clearance. After installation in the valve bore, it slides smoothly without obstruction, preventing issues such as uneven wear, hydraulic oil contamination, and valve core jamming during opening and closing. This significantly reduces the failure rate due to improved machining precision.

Internal core load-bearing components, including the valve core and seat sealing pair, pressure regulating spring, and throttling damper, all undergo a dual-strength heat treatment process of carburizing and quenching followed by low-temperature stress-relief tempering. This simultaneously improves surface hardness and structural toughness, providing long-term resistance to high-speed, continuous erosion by high-pressure hydraulic oil and scratches from tiny hard particles within the oil. This fundamentally eliminates common industry problems such as valve core sealing surface damage, excessive high-pressure internal leakage, and the inability to lock at the set working pressure.

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.