Dongfeng GX Protection Valve Assembly 3515010-H0100

Core Protective Function & Pressure Regulation

A key attribute of this assembly is its dual - stage pressure protection and overpressure prevention capability, which is critical for safeguarding the integrity of the vehicle's brake system. It is pre - calibrated to maintain a stable operating pressure range of 0.7 - 0.85 MPa (101.5 - 123.3 psi), automatically opening to release excess pressure when the system pressure exceeds 0.85 MPa to prevent damage to brake hoses, cylinders, or other components. Additionally, it features a check valve function that prevents reverse fluid/air flow, ensuring consistent pressure supply to the brake circuit and enhancing braking responsiveness and reliability, especially in high - load or long - downhill driving scenarios.

Durable Construction & Material Selection

The assembly is built for long - term durability in harsh automotive environments, utilizing high - quality materials for key components. The valve body is constructed from die - cast aluminum alloy (ADC12), which offers excellent corrosion resistance, lightweight properties, and high mechanical strength to withstand vibration, temperature fluctuations (-40°C to +120°C), and mechanical impacts during vehicle operation. The internal valve core and seals are made of nitrile rubber (NBR) and precision - machined stainless steel, respectively, ensuring tight sealing performance (with a leak rate of less than 1×10⁻⁶ Pa·m³/s) and resistance to wear, oil, and aging, thereby extending the assembly's service life to over 300,000 kilometers under normal operating conditions.

Integrated Assembly Design & Easy Maintenance

Designed as a fully integrated assembly, it combines the protection valve, pressure sensor interface, and mounting brackets into a single unit, simplifying the installation process and reducing the number of connection points (thus minimizing potential leak risks). The assembly is equipped with standard SAE 4 - bolt mounting flanges and threaded ports (G3/8") that match Dongfeng GX's original hydraulic/air circuit interfaces, allowing for direct bolt - on installation using common hand tools. For maintenance convenience, it features a removable pressure test port that enables technicians to quickly check the assembly's performance without disassembly, and all internal components are replaceable, reducing the cost of full assembly replacement when minor repairs are needed.

Compliance with Industry Safety Standards

This protection valve assembly meets or exceeds multiple international and domestic safety and quality standards, including ISO 4081 (Hydraulic fluid power - General rules relating to systems), GB 12676 (China National Standard for Commercial Vehicle Brake Systems), and Dongfeng's internal Q/DF standard for automotive brake components. It has passed rigorous testing procedures, such as 10,000 cycles of pressure fatigue testing, salt spray corrosion testing (480 hours), and high - and low - temperature cycle testing (-40°C to +120°C, 50 cycles), ensuring its reliability and safety in various operating conditions. This compliance makes it suitable for use in both domestic and international markets where strict automotive safety regulations are enforced.