303.02.0031 4-circuit protection valve

The brake system relies on precise pressure management to ensure vehicle safety and operational stability. This 4-circuit protection valve is engineered to regulate pneumatic airflow across multiple circuits, maintaining critical pressure thresholds during operation. It is designed to meet the rigorous demands of heavy commercial vehicle brake systems through its high-strength components.

The VADEN ORIGINAL 303.02.0031 is an OE equivalent for the KNORR-BREMSE AE4434, II16098 and MAN 81521516013, 81521516057, 81521516066, and 81521516069 systems. This component provides essential functionality for MAN and KNORR-BREMSE hardware architectures. The 303.02.0031 is the OE equivalent of the KNORR-BREMSE AE4434 used in MAN systems.

Technical specifications include a primary port of M22x1,5 and four secondary ports of M16x1,5. The valve features specific opening pressures of 7 BAR for circuits 21/22 and 6,5 BAR for circuits 23/24, ensuring precise pneumatic response. Technicians should verify port sizes and pressure differentials during installation to ensure optimal system-wide integration.

Regular inspection of the connection points and pressure stability is recommended for maintenance of the pneumatic circuit. This part ensures reliable air distribution within the braking system to prevent pressure drops in critical operating conditions.