303.02.0026 KNORR-BREMSE Multi-circuit Protection Valve

This multi-circuit protection valve serves as a vital component within the pneumatic brake system, ensuring precise pressure distribution across multiple circuits. Engineered for heavy-duty applications, the component maintains system integrity by managing opening pressures of 9 BAR for ports 21/22 and 7,5 BAR for ports 22/24, while maintaining a consistent closing pressure of 6 BAR. Its robust construction ensures reliable performance in demanding environments.

303.02.0026 is the OE-equivalent of the KNORR-BREMSE AE 4802 and K009830 multi-circuit protection valves used in MERCEDES BENZ vehicle systems. This part is engineered to meet strict technical requirements for heavy commercial vehicle braking stability and is fully compatible with the specified pneumatic configurations including M16x1,5 and M22x1,5 VOSS connections.

For workshop technicians, this valve offers seamless integration into existing brake circuits. The unit features specific port configurations: Port 1 (M16x1,5), Ports 21 through 26 (M22x1,5 VOSS), and Ports 27 and 28 (M12x1,5). Regular maintenance should include checking the pressure sensor output (5 V) and ensuring all VOSS connections are secure to prevent pneumatic leaks during heavy-duty service intervals.