434 208 000 0 WABCO Compatible Check Valve

What does a check valve do?

This check valve plays a critical role in maintaining pressure direction within the pneumatic brake system of heavy commercial vehicles. By preventing reverse airflow, it ensures that air pressure remains stable within the target circuit, which is essential for reliable braking performance and system stability under heavy loads.

System compatibility and specifications

The component is engineered to work with WABCO systems and follows strict industrial standards for pneumatic reliability. It features three M22x1.5 ports and is designed to operate safely up to a maximum pressure of 10 BAR, providing consistent performance in demanding environments.

Maintenance and inspection guidance

For optimal maintenance, technicians should inspect the valve during periodic brake system service. Checking for leaks using a soapy water test and ensuring that mounting connections remain tight will help prevent pressure drops. If moisture or contamination is found in the air lines, an inspection of this valve is highly recommended.

Troubleshooting and selection

Consult your authorized distributor to confirm fitment for your specific vehicle configuration.

OE cross-reference

303.15.0001 (Check Valve Check Valves) is the equivalent of the WABCO OE number. This part directly replaces WABCO OE number 4342080000.