303.02.0097 Compatible 4-Circuit Protection Valve
303.02.0097
Summary
This 4-circuit protection valve is engineered for heavy commercial vehicle brake systems. It features M22x1.5 and M16x1.5 port configurations, with specific opening pressures of 6.9 BAR and 7 BAR to ensure precise pneumatic control and system safety. Equivalent to OE Knorr-Bremse AE4447.
| EAN Code | 8683457009554 |
|---|
Ready to Order
Compatible OEM Codes
-
KNORR-BREMSE
- AE 4447
Description
This 4-circuit protection valve plays a critical role in the pneumatic brake system by dividing the air supply into multiple independent circuits. By isolating different sections of the braking system, it ensures that a leak in one circuit does not lead to a total loss of braking pressure, maintaining essential safety for heavy commercial vehicles.
The component is compatible with Knorr-Bremse systems and is designed to handle demanding operating conditions. It features an M22x1.5 inlet port and four M16x1.5 outlet ports (Ports 21, 22, 23, and 24). The technical configuration includes opening pressures of 6.9 BAR for ports 21, 22, and 24, while port 23 operates at a slightly higher 7 BAR threshold.
For optimal performance, technicians should verify that all port connections are secure and that the closing pressures (standardized at 4.5 BAR across all circuits) align with the vehicle's pneumatic requirements. Regular inspection of the valve seating and port integrity is recommended during routine brake system maintenance to prevent pressure drops.
Consult your authorized distributor.
The component is compatible with Knorr-Bremse systems and is designed to handle demanding operating conditions. It features an M22x1.5 inlet port and four M16x1.5 outlet ports (Ports 21, 22, 23, and 24). The technical configuration includes opening pressures of 6.9 BAR for ports 21, 22, and 24, while port 23 operates at a slightly higher 7 BAR threshold.
For optimal performance, technicians should verify that all port connections are secure and that the closing pressures (standardized at 4.5 BAR across all circuits) align with the vehicle's pneumatic requirements. Regular inspection of the valve seating and port integrity is recommended during routine brake system maintenance to prevent pressure drops.
Consult your authorized distributor.
OE cross-reference
303.02.0097 (4-circuit protection valve) is the equivalent of the Knorr-Bremse OE number. This part directly replaces Knorr-Bremse OE number AE4447.Technical Specifications
| Port 1 | M22x1,5 |
|---|---|
| Port 21 | M16x1,5 |
| Port 22 | M16x1,5 |
| Port 23 | M16x1,5 |
| Port 24 | M16x1,5 |
| Opening Pressure 21 | 6,9 BAR |
| Opening Pressure 22 | 6,9 BAR |
| Opening Pressure 23 | 7 BAR |
| Opening Pressure 24 | 6,9 BAR |
| Closing Pressure 21 | 4,5 BAR |
| Closing Pressure 22 | 4,5 BAR |
| Closing Pressure 23 | 4,5 BAR |
| Closing Pressure 24 | 4,5 BAR |
Other OEMs
KNORR-BREMSE
- AE4447
- AE 4447
Compatible Vehicles
| Brand | Model | Model Type | Engine |
|---|---|---|---|
| KNORR-BREMSE |
FAQ
What is the function of this protection valve?
It divides the air supply into four independent circuits to ensure that a single leak does not compromise the entire braking system's functionality.
What are the port sizes for this component?
The unit features one M22x1.5 port and four M16x1.5 ports (Ports 21, 22, 23, and 24) for pneumatic connection.
What are the pressure thresholds for this valve?
The opening pressures are set at 6.9 BAR for most ports and 7 BAR for port 23, while all circuits have a closing pressure of 4.5 BAR.
Is this compatible with Knorr-Bremse systems?
Yes, this component is designed to be compatible with Knorr-Bremse systems used in heavy commercial vehicles.
What are the OE reference numbers of this part?
303.02.0097 directly replaces Knorr-Bremse OE number AE4447.