303.02.0093 KNORR-BREMSE 4-circuit protection valve

The heavy-duty 4-circuit protection valve is a critical component within the pneumatic brake system of heavy commercial vehicles. It is designed to regulate air pressure distribution across multiple circuits, ensuring that even if one circuit fails, the remaining circuits maintain sufficient pressure for safe braking operations. This component is built with high-strength components to withstand constant pressure fluctuations and environmental rigors found in heavy-duty transport environments.

303.02.0093 is the OE-equivalent of the KNORR-BREMSE AE 4416 4-circuit protection valve used in KNORR-BREMSE systems. This part ensures seamless integration with existing pneumatic lines, utilizing a primary Port 1 (M22x1,5) and four secondary ports (M16x1,5) to maintain system integrity and safety standards.

For workshop technicians performing maintenance or assembly, this valve provides a reliable solution for restoring pneumatic circuit stability. The technical specifications include an opening pressure of 7 BAR and a closing pressure of 5 BAR for all four circuits (21, 22, 23, and 24). Regular inspection of the port seals and checking for any pressure drops within the circuit junctions is recommended during routine brake system service intervals to ensure optimal performance.