81.52151.6094 Four Circuit

81.52151.6094 Four-Circuit Protection Valve

1. Function

• Circuit Separation and Protection: The four-circuit protection valve divides the vehicle's air system into four interconnected yet independent circuits. This ensures that if one circuit fails (e.g., due to a break or leak), the other circuits remain operational and continue to be charged, maintaining overall system functionality and safety.

• Normal Operation as a Five-Way Joint: Under normal conditions, the valve acts as a five-way joint, facilitating the distribution of air pressure to each circuit.

• Initial Braking Capability: Typically, out of the valve's outlets (21 and 22), one circuit is prioritized to activate first, ensuring the vehicle has initial braking capability for safety. The remaining circuits activate randomly as needed.

2. Specifications

• Part Number: 81.52151.6094

• Application: Specifically designed for heavy-duty trucks, such as the Shaanxi Automobile Delong F3000 and M3000 series, as well as military vehicle variants (e.g., SX2150K, SX2190, SX2153, SX2300, SX4323).

• Brand: Shaanxi Automobile 

• Customization: Available for custom processing based on samples, drawings, or specific requirements.

• Packaging and Logistics:

• Minimum Order Quantity: 2 units

• Pricing:

• ¥88.00 per unit for 2 units

• ¥49.00 per unit for 50-99 units

• ¥46.00 per unit for ≥100 units

• Shipping: Logistics from Wenzhou, Zhejiang Province, with a shipping fee of ¥16.00

3. Material

• Valve Body: Typically made from durable, high-strength alloy steel or aluminum alloy to withstand high pressures and temperatures encountered in the air brake system.

• Seals and Diaphragms: Constructed from rubber or synthetic materials resistant to air leakage and aging.

4. Key Parameters

• Working Pressure: Designed to operate within a specified pressure range (e.g., 0.8-1.0 MPa) to ensure reliable performance under various conditions.

• Flow Rate: The valve must provide sufficient air flow to each circuit to meet the braking system's demands.

• Leakage Rate: Minimal leakage is allowed to maintain system efficiency and safety.

• Response Time: The valve must activate promptly in the event of a circuit failure to prevent further system disruption.

• Temperature Resistance: Capable of operating within a wide temperature range to accommodate different environmental conditions.

• Dimensional Accuracy: Precise dimensions are critical to ensure proper fitment and sealing with the vehicle's air system components.