GVO 31Q8-17810 31QB-17B20 Auxiliary Relief Valve Pressure Relief Valve R210LC-9

Product Specification

GVO 31Q8-17810 31QB-17B20 Auxiliary Relief Valve Pressure Relief Valve R210LC-9 R220LC-9S R290LC-9 R300LC-9S 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 relief valve is custom-developed for the hydraulic systems of the Hyundai Robex R290LC-9 and R300LC-9S. As a single-circuit overload safety valve, it independently controls the pressure of the boom, stick, or breaker branch. The system relief pressure can be precisely calibrated via the bottom adjusting nut to match the original hydraulic parameters of the machine model.

1. Heavy-duty pressure protection: Limits the peak pressure of the circuit, and immediately overflows when encountering hard soil or rock during excavation, preventing damage to the pump, distribution valve, and cylinder from bursting, significantly reducing overhaul costs;

2. Long-lasting and durable structure: The valve core and valve sleeve are precision-matched and ground, and the spring is made of high-temperature resistant alloy, making it less prone to fatigue failure in long-term high-temperature hydraulic oil environments, reducing overall machine weakness and vibration;

3. Versatile and multi-condition: It can be used as a standard operating circuit overload valve or equipped with a breaker-specific circuit, allowing one valve to handle both earthmoving and breaker operations;

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.