303.02.0025 Multi-circuit Protection Valve — KNORR-BREMSE

This Multi-circuit Protection Valve is a critical component within the pneumatic brake system of heavy commercial vehicles, designed to manage and protect multiple air circuits. It functions by regulating pressure thresholds between specific ports to ensure the stability of the braking-suspension systems during operation. Constructed with high-strength components, it provides reliable pressure management under demanding driving conditions.

303.02.0025 is the OE-equivalent of the KNORR-BREMSE AE 4804 and K01444 ☑ multi-circuit protection valves used in heavy commercial vehicle systems. This component is engineered to meet the exact specifications of compatible KNORR-BREMSE hardware, ensuring seamless integration with existing pneumatic lines and maintaining the integrity of the braking circuit.

For workshop technicians, this valve offers precise pressure thresholds, including an opening pressure of 9 BAR for ports 21/22 and 7.5 BAR for ports 22/24. The installation process requires attention to the specific port sizes: M16x1,5 for Port 1, M22x1,5 VOSS for ports 21 through 26, and M12x1,5 for ports 27 and 28. Regular maintenance checks of the pneumatic connections are recommended to ensure optimal pressure regulation and prevent system leaks during service intervals.