303.02.0047 4-circuit protection valve — IVECO

This high-strength component serves as a critical safety element within the pneumatic brake system of heavy commercial vehicles. The 4-circuit protection valve is engineered to manage air pressure distribution across multiple circuits, ensuring that a failure in one part of the system does not compromise the entire braking capability. Its robust construction provides reliable performance under demanding operating conditions.

303.02.0047 is the OE-equivalent of the IVECO 42530049 and KNORR-BREMSE AE 4641 used in various heavy commercial vehicle braking systems. This part ensures precise pressure regulation, with an operating pressure of up to 13 BAR and specific opening/closing thresholds for ports 21 through 24 to maintain optimal system integrity.

For workshop technicians, installation requires careful attention to the port specifications: Port 1 utilizes an M22x1,5 thread, while Ports 21, 22, 23, and 24 use M16x1,5 threads. Regular maintenance checks of the pneumatic lines and pressure thresholds are recommended to ensure the valve functions correctly within the braking circuit and maintains the required air integrity during long-haul operations.