303.02.0030 Compatible 4-Circuit Protection Valve
303.02.0030
Summary
This high-strength 4-circuit protection valve is designed for heavy commercial vehicle brake systems. It features M22x1.5 and M16x1.5 port configurations with specific opening pressures of 6.5 BAR to ensure precise pneumatic control and safety in demanding braking environments. Equivalent to OE DAF 0384037 and Knorr-Bremse AE4179.
| EAN Code | 8699031096278 |
|---|
Ready to Order
Compatible OEM Codes
-
DAF
- 384037R
- 384037A
- 1238512R
- 1238512A
- 1238512
- 0384037R
- 0384037A
- 0384037
-
KNORR-BREMSE
- I80509
- AE 4179
Description
What does a 4-circuit protection valve do?
This 4-circuit protection valve serves as a critical component within the pneumatic brake system of heavy commercial vehicles. It functions by dividing the air supply into four independent circuits, ensuring that a leak in one area does not lead to a total loss of braking pressure across the entire vehicle system.Vehicle and system compatibility
This component is compatible with DAF trucks and is also an equivalent for Knorr-Bremse systems. It features a main port of M22x1.5 and multiple secondary ports of M16x1.5, providing the necessary architecture for complex air distribution.Installation and maintenance
For reliable performance, technicians should verify the opening pressure of 6.5 BAR and closing pressure of 4.5 BAR during installation. Regular inspection of the port connections and pneumatic lines is recommended to maintain optimal system integrity.System performance guidance
When replacing this unit, ensure that all seals are seated correctly to prevent pressure drops in the braking circuit. Consult your authorized distributor.OE cross-reference
303.02.0030 (4-circuit protection valve) is the equivalent of the DAF and Knorr-Bremse OE numbers. This part directly replaces DAF OE numbers 0384037, 0384037A, 0384037R, 1238512, 1238512A, 1238512R, 384037A, 384037R. It also replaces Knorr-Bremse OE numbers AE4179, I80509.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 | 6,5 BAR |
| Opening Pressure 22 | 6,5 BAR |
| Opening Pressure 23 | 6,5 BAR |
| Opening Pressure 24 | 6,5 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
DAF
- 384037R
- 384037A
- 1238512R
- 1238512A
- 1238512
- 0384037R
- 0384037A
- 0384037
KNORR-BREMSE
- AE4179
- I80509
- AE 4179
Related Products
Repair Kits
Compatible Vehicles
| Brand | Model | Model Type | Engine |
|---|---|---|---|
| DAF | |||
| KNORR-BREMSE |
FAQ
What is the function of a 4-circuit protection valve?
It manages air distribution by dividing the brake system into four independent circuits, preventing total pressure loss if a single line fails.
What are the port specifications for this valve?
This unit is equipped with one M22x1.5 port and four M16x1.5 ports to facilitate standard pneumatic connections.
What are the pressure settings for this component?
The valve operates with an opening pressure of 6.5 BAR and a closing pressure of 4.5 BAR across its circuits.
Which vehicle brands is this compatible with?
This part is designed for DAF vehicles and is compatible with Knorr-Bremse systems.
What are the OE reference numbers of this part?
303.02.0030 directly replaces DAF OE numbers 0384037, 0384037A, 0384037R, 1238512, 1238512A, 1238512R, 384037A, 384037R. It also replaces Knorr-Bremse OE numbers AE4179, I80509.