568-3724 502-2707 Control Valve Pressure Relief Valve Hydraulic Safety Valve

Product Specification

568-3724 502-2707 Control Valve Pressure Relief Valve Hydraulic Safety Valve E349D2 E349F E349FL E352F E345D 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

Developed to address the hydraulic wear issues of 49-ton heavy-duty mining excavators, this product perfectly adapts to the E349D2 and E349F distribution valve branch mounting positions. The threads, oil passages, and sealing structure are 1:1 replicas of the original parts, eliminating the need for grinding or modifying the valve body during maintenance and disassembly, significantly reducing downtime for large equipment maintenance.

1. Heavy-duty branch pressure protection: Independently controls the maximum working pressure of the boom, stick, and breaker hydraulic circuits. In hard rock excavation, it instantly overflows and releases pressure when the load exceeds the limit, protecting core components such as cylinders and hydraulic motors from high-pressure burst damage, significantly reducing the high overhaul costs of heavy excavators.

2. Mining-enhanced wear-resistant process: The valve body is integrally quenched and strengthened, resisting impact and corrosion from slag and oil. The pressure regulating spring is high-temperature resistant and fatigue-resistant, and is not prone to softening and failure under long-term high-temperature and high-pressure conditions. This fundamentally improves common heavy excavator problems such as weak single-action operation, jamming and vibration, and rapid oil temperature rise.

3. Universal for all heavy-duty scenarios: Adaptable to all scenarios including large-scale mining, rock breaking, infrastructure earthwork, and large-scale river dredging. It can be used as a standard overload valve or specially matched with the breaker hydraulic circuit. It is a frequently used hydraulic component for 349 series heavy 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.