GVO 723-40-87100 7234087100 Excavator Parts PC200-7 PC300-8 PC350-8 Return Oil Back Pressure Valve Hydraulic Valve

GVO 723-40-87100 7234087100 Excavator Parts PC200-7 PC300-8 PC350-8 Return Oil Back Pressure Valve Hydraulic 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

This flange-type main relief valve is specifically designed for the hydraulic systems of Komatsu's classic medium-to-large tonnage machines. It is perfectly compatible with the older PC200-7 20-ton direct-injection model, and the PC300-8 and PC350-8 30-ton electronically controlled heavy-duty models. These three models cover most construction scenarios, including earthmoving, mining, heavy-duty loading, and foundation excavation, and have a large market presence with consistently high demand for maintenance and replacement.

The valve body is made of high-toughness alloy ductile iron through a single precision casting process. The internal flow channels are formed using a lost-wax precision casting process, resulting in a dense and uniform internal structure. This eliminates defects common in ordinary castings, such as sand holes, porosity, looseness, high-pressure impact cracking, and internal oil leakage. It can withstand the high-frequency, high-pressure hydraulic pulse impacts of mining operations for extended periods, and the pressure-bearing capacity of the body fully meets the stringent requirements of heavy-duty equipment.

The core moving parts, such as the valve core, valve seat, pressure regulating spring, and damping core, are all made of high-quality alloy steel. They undergo a complete set of heat treatment and precision machining processes, including carburizing and quenching, low-temperature stress-relieving tempering, and high-precision mirror grinding. The surface finish of the valve core reaches the micron level for hydraulic precision components, ensuring smooth and seamless reciprocating opening and closing. This minimizes malfunctions such as sealing surface scratches, excessive clearances, and excessive internal leakage caused by long-term erosion from high-pressure hydraulic oil. The valve body undergoes blackening and passivation for rust prevention, while the internal oil passages are phosphated for corrosion protection, making it resistant to rust and blockage caused by mud and water immersion, dust accumulation, and high-temperature oil corrosion.

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.