303.02.0041 4-circuit protection valve — DAF

The heavy duty 4-circuit protection valve serves a critical role in maintaining pneumatic stability within the braking system of heavy commercial vehicles. This component manages air distribution across multiple circuits to ensure consistent braking performance and safety under varying operating conditions. Designed with high-strength components, it provides reliable pressure regulation to prevent system failures during transit.

303.02.0041 is the OE-equivalent of the DAF 1521155 and DAF 1367504 4-circuit protection valve used in DAF CF75, CF85, XF95, and LF series vehicles, as well as KNORR-BREMSE systems such as AE 4610, II37462, and II37462N52. This part ensures seamless integration into the pneumatic architecture of professional heavy-duty trucks.

For workshop technicians, this valve features a primary M22x1,5 port and four secondary ports (M16x1,5) for precise assembly. The technical specifications include an operating pressure of 12 BAR, with specific opening pressures for ports 21 through 24 ranging from 6,5 to 7,3 BAR and closing pressures set at 4,5 BAR. Regular inspection of port connections and pressure thresholds is recommended during routine brake system maintenance to ensure optimal pneumatic flow.