The relay valve (also called brake relay valve) of the Sinotruk HOWO series heavy-duty trucks is a key component of the vehicle's air brake system. The OE number is WG9000360524 (or similar models such as WG9000360520/521/523) and is compatible with HOWO A7, T7H, TX, and Sinotruk C7H models. Function and Role: As an "amplifier" of braking signals, this valve optimizes the air circuit control logic to achieve rapid response and precise transmission of braking commands, significantly shortening braking response time and improving driving safety. Its core design balances efficiency and reliability, adapting to the upgrade needs of mainstream heavy-duty truck air braking systems.

Structural Features and Technological Innovations:

1. Modular Design: Compactness and Efficiency

Utilizing a lightweight aluminum alloy valve body, its weight is 25% lighter than traditional cast iron structures, adapting to the high-load operating environment of heavy-duty trucks.

Integrated air circuit layout reduces external pipeline connections, lowers air pressure transmission resistance, and improves system response.Speed.

2. Dual-chamber piston structure: Safety redundancy guarantee

The built-in dual-chamber piston design ensures that if one chamber fails, the other chamber can independently maintain the braking function, avoiding brake failure due to the failure of a single component.

The piston stroke and air pressure response are precisely calibrated to ensure that the front and rear wheel braking synchronization rate reaches over 98% when the brake pedal is depressed.

3. Intelligent Air Path Control: Precise Response and Energy-Saving Optimization

By optimizing the air path design, the air pressure transmission path is shortened, and the braking response time is ≤0.12 seconds, which is 30% faster than traditional relay valves.

The built-in pressure balance valve prevents brake vibration or deviation caused by air pressure fluctuations, improving driving comfort.

Function and System Value:

1. Braking Signal Amplification Core

As the "nerve center" of the air braking system, it converts the mechanical action of the driver pressing the brake pedal into...Converted into air pressure signals, and efficiently transmitted and amplified through a dual-chamber piston structure.

Supports stepless adjustment of braking intensity to adapt to braking needs under different road conditions (such as steep mountain slopes and congested urban roads).

2. Safety Redundancy Design

The dual-chamber piston structure and independent air circuit design ensure that even if one chamber fails to seal, braking can still be maintained through the other chamber, avoiding the risk of accidents.

Built-in fault self-check function automatically cuts off the air pressure supply when the air circuit system malfunctions, preventing the braking system from entering a dangerous state.

3." Lightweight and Energy Efficiency Optimization: The aluminum alloy valve body and compact design reduce the overall weight of the braking system, lowering fuel consumption. Optimized air passages reduce air pressure transmission resistance, improving braking response speed while reducing pump load and extending system life. **Compatibility and Installation Advantages:** 1. Original Equipment Manufacturer (OEM) Compatibility: Strictly compliant with OEM standards.Following the air brake system design standards of models such as Sinotruk Howo and Sinotruk Shandeka, the interface and pipeline layout are fully matched to the original vehicle.

Supports interchangeability with WABCO original parts, ensuring convenience for system upgrades or repairs.

2. Simplified Installation Process

Modular design; installation only requires connecting the air line interface to the brake pedal linkage mechanism, no additional adjustments required.

Installation positioning marks are provided to ensure the accuracy of valve body installation angle and air line connection.

Brand and Service Support:

Production Guarantee: Zhejiang Chuangtuo Automotive Parts Co., Ltd. relies on automated production lines to ensure batch consistency and quality stability of products.

After-Sales System: Provides technical consultation and fault diagnosis services to assist users in quickly locating abnormalities in the air brake system.

Warranty Policy: Products enjoy a 2-year warranty; free replacement of damage caused by quality problems within the warranty period.