303.02.0052 Compatible 4-Circuit Protection Valve

What does a 4-circuit protection valve do?

This protection valve plays a critical role in the pneumatic brake system by dividing the air supply into multiple independent circuits. By managing pressure distribution, it ensures that a leak in one circuit does not lead to a total loss of braking capability, maintaining safety during heavy-duty operations.

System compatibility and port configuration

The component is engineered to work seamlessly within complex braking architectures, specifically compatible with Knorr-Bremse systems. It manages multiple air pathways through precision-engineered ports, including one M22x1.5 inlet and four M16x1.5 outlets, providing the necessary division for multi-circuit safety.

Technical specifications and maintenance

For optimal performance, technicians should verify that the opening pressures (6.5 BAR) and closing pressures (4.5 BAR) align with the specific vehicle requirements. This unit is built from high-strength components to withstand operating pressures up to 20 BAR, ensuring long-term reliability in demanding environments.

Reliability in heavy commercial applications

Regular inspection of the connection ports and pressure regulation accuracy is recommended during routine maintenance to prevent system failure. Consult your authorized distributor for precise fitment details.

OE cross-reference

303.02.0052 (4-circuit protection valve) is the equivalent of the Knorr-Bremse OE numbers. This part directly replaces Knorr-Bremse OE numbers AE4648, K019911.