303.02.0070 KNORR-BREMSE 4-circuit protection valve

The pneumatic regulation of a vehicle's braking system requires high-precision components to maintain safety and stability. This 4-circuit protection valve is designed to manage air pressure across multiple circuits, ensuring that even during a leak or system failure, the essential braking functions remain operational. The component is built with high-strength components to withstand the rigorous demands of heavy commercial vehicle operations.

The 303.02.0070 is the OE equivalent of the KNORR-BREMSE AE4448 used in professional brake systems. It features specific pressure profiles: Port 21 and 22 open at 6,9 BAR and close at 4,5 BAR, while Port 23 opens at 7 BAR and Port 24 at 7,5 BAR. This technical precision ensures optimal air distribution across the pneumatic circuits within the braking system.

Installation should be performed by a qualified workshop technician to ensure the integrity of the pneumatic connections. The valve utilizes a specialized port configuration including Port 1 (M22x1,5) and various M16x1,5 ports to facilitate secure integration with existing lines. Regular inspections of the seal integrity and pressure thresholds are recommended during routine maintenance cycles to ensure long-term performance.

The VADEN ORIGINAL product provides a reliable solution for maintaining system stability under varying load conditions. By adhering to strict technical specifications, this part assists in preventing total air loss in critical driving scenarios.