303.02.0105 Compatible 4-Circuit Protection Valve
303.02.0105
Summary
This high-strength 4-circuit protection valve is engineered for heavy commercial vehicle brake systems. It features M22x1.5 Voss ports and specific opening pressures of 6.9 BAR to 7 BAR, ensuring reliable pneumatic circuit division and pressure regulation. Equivalent to OE MAN 81521516100 and WABCO 9347144010.
| EAN Code | 8683457009769 |
|---|
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Compatible OEM Codes
-
WABCO
- 934 714 401 0
-
MAN
- 81.52151-6100
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 multiple independent circuits, which ensures that a leak in one circuit does not result in a total loss of braking capability across the entire vehicle system.Vehicle and system compatibility
This component is compatible with MAN vehicles and is designed to meet the rigorous demands of professional workshop environments. It is also suitable for use in systems requiring high-precision pressure management, such as those integrated with WABCO systems.Technical specifications and installation
The valve features M22x1.5 Voss thread ports for secure connections. Technicians should monitor the opening pressures, which range from 6.9 BAR to 7 BAR depending on the specific port, to ensure optimal pneumatic performance and system safety during maintenance intervals.Maintenance and troubleshooting
Regular inspection of the valve body and port connections is recommended to prevent air leaks. Consult your authorized distributor for fitment verification.OE cross-reference
303.02.0105 (4-circuit protection valve) is the equivalent of the MAN and WABCO OE numbers. This part directly replaces MAN OE number 81521516100. It also replaces WABCO OE number 9347144010.Technical Specifications
| Opening Pressure 21 | 6,9 BAR |
|---|---|
| Opening Pressure 22 | 6,9 BAR |
| Closing Pressure 21 | 6,4 BAR |
| Closing Pressure 22 | 6,4 BAR |
| Closing Pressure 23 | 6,4 BAR |
| Closing Pressure 24 | 6,4 BAR |
| Opening Pressure 23 | 7 BAR |
| Opening Pressure 24 | 6,9 BAR |
| Port 1 | M22x1,5 Voss |
| Port 21 | M22x1,5 Voss |
| Port 22 | M22x1,5 Voss |
| Port 23 | M22x1,5 Voss |
| Port 24 | M22x1,5 Voss |
Other OEMs
MAN
- 81521516100
- 81.52151-6100
WABCO
- 9347144010
- 934 714 401 0
Related Products
Repair Kits
Compatible Vehicles
| Brand | Model | Model Type | Engine |
|---|---|---|---|
| MAN | |||
| WABCO |
FAQ
What is the function of a 4-circuit protection valve?
It divides the compressed air into four independent circuits, ensuring that a failure in one circuit does not compromise the braking performance of the others.
Which vehicle brands is this valve compatible with?
This component is compatible with MAN vehicles and is designed to function within WABCO systems.
What are the port specifications for this component?
The valve is equipped with M22x1.5 Voss ports to ensure secure and standardized pneumatic connections.
How do I know when to replace the protection valve?
Technicians should look for signs of pressure drops or air leaks at the ports or irregular opening pressures during system testing.
What are the OE reference numbers of this part?
303.02.0105 directly replaces MAN OE number 81521516100. It also replaces WABCO OE number 9347144010.