GVO 51650-9 51650-4 Pressure Relief Valve Control Valve Hydraulic Safety Valve HL730-7 HL730-7A HL740TM-7A Excavator Parts

GVO 51650-9 51650-4 Pressure Relief Valve Control Valve Hydraulic Safety Valve HL730-7 HL730-7A HL740TM-7A Excavator Parts

Product Description

The GVO excavator relief valve, compatible with HL730-7 HL730-7A  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 plug-in relief valve is specially designed for the harsh working conditions of construction machinery sites. It is responsible for functions such as pressure regulation, pressure stabilization, overload relief and overload discharge in the hydraulic system. The valve body is forged from high-quality alloy steel and undergoes overall quenching and tempering treatment, which gives it excellent shock resistance and fatigue resistance. It can withstand frequent pressure fluctuations during equipment operation.

The valve core is precisely ground and machined, with a high precision on the sealing cone surface. It has a sensitive pressure response and stable pressure regulation. During operation, it is unlikely to encounter pressure drift, vibration, or abnormal noise. It is equipped with high-quality sealing components that can withstand both high and low temperatures, and is suitable for various types of construction machinery hydraulic oil. It does not age or leak easily during long-term use. The standard threaded plug-in specification ensures strong versatility. During maintenance and replacement, it can be directly disassembled and assembled without altering the original piping, significantly reducing the downtime for equipment maintenance. 

When the system pressure exceeds the preset threshold, the valve component quickly opens the relief valve to release the excess hydraulic oil back to the oil reservoir, preventing the system from overpressurizing and protecting all the hydraulic components. This effectively extends the service life of the hydraulic pump, main control valve, and oil pipes. It is a key component for ensuring the safety of the hydraulic system in excavators.

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.