303.02.0070 KNORR-BREMSE 4-circuit protection valve

The heavy duty 4-circuit protection valve plays a critical role in maintaining pneumatic stability within the braking system of heavy commercial vehicles. By managing pressure distribution across multiple circuits, this component ensures that even in the event of a single circuit failure, the rest of the braking system remains operational, providing essential safety and reliability for heavy-duty transport.

303.02.0070 is the OE-equivalent of the KNORR-BREMSE AE 4448 4-circuit protection valve used in various heavy commercial vehicle brake systems. This component features specialized opening pressures: Port 21 and 22 at 6,9 BAR, and Port 23 and 24 at 7 BAR and 7,5 BAR respectively, ensuring precise pneumatic regulation during operation.

For workshop technicians, this part offers seamless installation into existing brake architectures. It is designed for durability under high-stress conditions, featuring robust port connections including M22x1,5 for Port 1 and M16x1,5 for all other ports. Regular maintenance and inspection of the pneumatic lines and valve seating are recommended to ensure optimal braking performance and system longevity.

This valve is specifically engineered for professional service environments where precision and reliability are paramount. It manages pressure fluctuations effectively to prevent system degradation during heavy-duty transport tasks.