GVO 316-6212 3166212 Main Relief Valve Pressure Relief Valve Hydraulic Unloading

Product Specification

GVO 316-6212 3166212 Main Relief Valve Pressure Relief Valve Hydraulic Unloading Valve E307D E308D E308E 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

Compatible with E307D, E308D, and E308E mini excavators' secondary relief valve (commonly known as secondary cannon or branch overload valve). 1:1 replica of the original valve body dimensions; threads, oil passages, and sealing grooves perfectly match the distribution valve bore. Straight-in installation requires no grinding or modification.

1. Independent Pressure Protection for Each Branch Circuit: Independently controls the maximum working pressure of the boom, stick, and mini breaker hydraulic circuits. When excavating hard soil or rocks, it instantly overflows and releases pressure when the load exceeds the limit, protecting the corresponding cylinders and hydraulic motors. This prevents high-pressure damage to a single branch circuit and reduces the hydraulic maintenance costs of mini excavators.

2. Precision, Wear-Resistant, and Long-Lasting Structure: The valve body is integrally hardened and reinforced, resisting impact and hydraulic oil corrosion. The pressure regulating spring is high-temperature resistant and fatigue-resistant, and is not prone to softening and failure under long-term high-temperature conditions. This fundamentally improves common mini excavator problems such as weak single-action operation, jamming, vibration, and abnormal oil temperature rise.

3. Versatile for Multiple Light Construction Scenarios: Adaptable to all scenarios including municipal landscaping, indoor demolition, farmland reclamation, and small trench excavation. It can be used as a standard overload valve or in conjunction with the mini breaker hydraulic circuit. It is a frequently used hydraulic component for 307/308 series mini 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.