303.02.0104 WABCO 4-circuit protection valve

The 303.02.0104 4-circuit protection valve serves as a critical component within the pneumatic brake system of heavy commercial vehicles. Its primary function is to regulate and protect multiple air circuits, ensuring that pressure fluctuations in one circuit do not negatively impact the stability of others. Engineered with high-strength components, this valve provides reliable air distribution and maintains system integrity during intense driving conditions.

This product is the OE-equivalent of the WABCO 934 714 400 0 4-circuit protection valve used in MAN and NEOPLAN heavy vehicles. It is specifically designed to meet the technical requirements of these vehicle makes, ensuring seamless integration with existing pneumatic architectures. The unit features several M22x1,5 Voss ports to facilitate precise connection and stable airflow management.

For workshop technicians, this component offers straightforward installation due to its standardized port sizes and robust construction. The technical specifications include an opening pressure of 6,9 BAR for ports 21, 22, and 24, and a closing pressure of 5 BAR across multiple circuits to ensure rapid response and safety. Regular inspection of the pneumatic connections and port integrity is recommended during standard maintenance cycles to ensure optimal braking performance.