303.02.0010 Compatible 4-Circuit Protection Valve
303.02.0010
Summary
This 4-circuit protection valve is designed for heavy commercial vehicle pneumatic systems, featuring M22x1.5 and M16x1.5 port configurations. It ensures reliable pressure distribution and circuit isolation for MAN and Mercedes-Benz vehicles. Equivalent to OE Knorr-Bremse AE4162, MAN 81521516020 and Mercedes-Benz 0014313506.
| EAN Code | 8699031090443 |
|---|
Ready to Order
Compatible OEM Codes
-
MERCEDES BENZ
- 002 431 93 06
- 002 431 29 06
- 002 431 04 06
- 001 431 84 06
- 001 431 47 06
- 001 431 39 06
- 001 431 35 06
-
MAN
- 81.52151-6063
- 81.52151-6056
- 81.52151-6054
- 81.52151-6033
- 81.52151-6032
- 81.52151-6023
- 81.52151-6020
-
KNORR-BREMSE
- I73329
- AE 4162
Description
What does a 4-circuit protection valve do?
This 4-circuit protection valve plays a critical role in the pneumatic brake system of heavy commercial vehicles by managing air pressure distribution. It functions by splitting the supply pressure into four independent circuits, ensuring that a pressure loss in one section does not compromise the entire braking capability. Built with high-strength components, it provides the necessary reliability for demanding transport operations.Vehicle compatibility and technical specifications
The component is designed for compatibility with MAN and Mercedes-Benz vehicles, ensuring precise air management within the braking assembly. It is also compatible with Knorr-Bremse systems. This valve features specific port sizes, including an M22x1.5 inlet and multiple M16x1.5 outlets, to maintain optimal pneumatic flow.Maintenance and installation guidance
For technical accuracy, this unit operates with a maximum pressure of 10 BAR. The specific circuit settings include opening pressures of 7 BAR and closing pressures of 5 BAR for ports 21, 22, 23, and 24. Technicians should inspect the seals and port connections during routine maintenance to prevent air leaks.Troubleshooting and selection
When replacing this component, ensure that all connections are tightened to specification to maintain the integrity of the air circuits. Consult your authorized distributor for installation guidance.OE cross-reference
303.02.0010 (4-circuit protection valve) is the equivalent of the Knorr-Bremse, MAN and Mercedes-Benz OE numbers. This part directly replaces Knorr-Bremse OE numbers AE4162, I73329. It also replaces MAN OE numbers 81521516020, 81521516023, 81521516032, 81521516033, 81521516054, 81521516056, 81521516063 and Mercedes-Benz OE numbers 0014313506, 0014313906, 0014314706, 0014318406, 0024310406, 0024312906, 0024319306.Technical Specifications
| Port 1 | M22x1,5 |
|---|---|
| Port 12 | M16x1,5 |
| Port 21 | M16x1,5 |
| Port 22 | M16x1,5 |
| Port 11 | M16x1,5 |
| Port 23 | M16x1,5 |
| Port 24 | M16x1,5 |
| Pressure | MAX 10 BAR |
| Opening Pressure 21 | 7 BAR |
| Opening Pressure 22 | 7 BAR |
| Opening Pressure 23 | 7 BAR |
| Opening Pressure 24 | 7 BAR |
| Closing Pressure 21 | 5 BAR |
| Closing Pressure 22 | 5 BAR |
| Closing Pressure 23 | 5 BAR |
| Closing Pressure 24 | 5 BAR |
Other OEMs
KNORR-BREMSE
- AE4162
- I73329
- AE 4162
MAN
- 81521516063
- 81521516056
- 81521516054
- 81521516033
- 81521516032
- 81521516023
- 81521516020
- 81-52151-6063
- 81-52151-6056
- 81-52151-6054
- 81-52151-6033
- 81-52151-6032
- 81-52151-6023
- 81-52151-6020
- 81.52151-6063
- 81.52151-6056
- 81.52151-6054
- 81.52151-6033
- 81.52151-6032
- 81.52151-6023
- 81.52151-6020
MERCEDES BENZ
- A0024319306
- A0024312906
- A0024310406
- A002 431 93 06
- A002 431 29 06
- A002 431 04 06
- A0014318406
- A0014314706
- A0014313906
- A0014313506
- A001 431 84 06
- A001 431 47 06
- A001 431 39 06
- A001 431 35 06
- 0024319306
- 0024312906
- 0024310406
- 002.431.9306
- 002.431.93.06
- 002.431.2906
- 002.431.29.06
- 002.431.0406
- 002.431.04.06
- 002-431-93-06
- 002-431-29-06
- 002-431-04-06
- 002 431 9306
- 002 431 2906
- 002 431 0406
- 0014318406
- 0014314706
- 0014313906
- 0014313506
- 001.431.8406
- 001.431.84.06
- 001.431.4706
- 001.431.47.06
- 001.431.3906
- 001.431.39.06
- 001.431.3506
- 001.431.35.06
- 001-431-84-06
- 001-431-47-06
- 001-431-39-06
- 001-431-35-06
- 001 431 8406
- 001 431 4706
- 001 431 3906
- 001 431 3506
- 002 431 93 06
- 002 431 29 06
- 002 431 04 06
- 001 431 84 06
- 001 431 47 06
- 001 431 39 06
- 001 431 35 06
Related Products
Repair Kits
Compatible Vehicles
| Brand | Model | Model Type | Engine |
|---|---|---|---|
| KNORR-BREMSE | |||
| MAN | |||
| MERCEDES BENZ |
FAQ
What is the primary function of this protection valve?
It distributes supply pressure to four independent pneumatic circuits and isolates any circuit experiencing a pressure loss to maintain braking safety.
Which vehicle brands are these valves compatible with?
This part is designed for use in MAN and Mercedes-Benz heavy commercial vehicles and is compatible with Knorr-Bremse systems.
What are the specific port sizes for this component?
The unit features an M22x1.5 inlet port (Port 1) and multiple M16x1.5 outlet ports (Ports 11, 21, 22, 23, and 24).
What are the pressure operating limits?
The valve is rated for a maximum pressure of 10 BAR, with specific opening pressures at 7 BAR and closing pressures at 5 BAR for the secondary circuits.
What are the OE reference numbers of this part?
303.02.0010 directly replaces Knorr-Bremse OE numbers AE4162, I73329. It also replaces MAN OE numbers 81521516020, 81521516023, 81521516032, 81521516033, 81521516054, 81521516056, 81521516063 and Mercedes-Benz OE numbers 0014313506, 0014313906, 0014314706, 0014318406, 0024310406, 0024312906, 0024319306.