303.02.0081 Compatible 4-Circuit Protection Valve
303.02.0081
Summary
This 4-circuit protection valve ensures pneumatic stability within heavy commercial vehicle brake systems. It features M22x1.5 and M16x1.5 ports, with opening pressures of 7 BAR and closing pressures of 4.5 BAR for precise circuit management. Compatible with Knorr-Bremse systems. Equivalent to OE Knorr-Bremse AE4187.
| EAN Code | 8683457009400 |
|---|
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Compatible OEM Codes
-
KNORR-BREMSE
- AE 4187
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. Its primary function is to divide the air supply into four independent circuits, ensuring that a leak in one section does not compromise the entire braking capability of the vehicle. By maintaining pressure integrity, it provides essential safety and reliability during operation.Vehicle and system compatibility
The component is designed to work seamlessly with Knorr-Bremse systems and is engineered to withstand the rigorous demands of heavy commercial transport. This valve is suitable for various heavy commercial vehicle applications where reliable pressure regulation is mandatory for braking safety.Technical specifications and installation
Technicians should note the specific port configurations, which include one M22x1.5 inlet and four M16x1.5 outlets. The valve operates with a precise opening pressure of 7 BAR and a closing pressure of 4.5 BAR across all secondary ports. During installation, ensure all connections are secure to maintain optimal pneumatic performance.Maintenance and troubleshooting
Regular inspection of the valve ports and pressure settings is recommended to prevent system failures. If a loss of pressure is detected in specific circuits, this component should be evaluated for integrity to ensure continued operational safety.OE cross-reference
303.02.0081 (4-circuit protection valve) is the equivalent of the Knorr-Bremse OE number. This part directly replaces Knorr-Bremse OE number AE4187.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 | 7 BAR |
| Opening Pressure 22 | 7 BAR |
| Opening Pressure 23 | 7 BAR |
| Opening Pressure 24 | 7 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
- AE4187
- AE 4187
Related Products
Repair Kits
Compatible Vehicles
| Brand | Model | Model Type | Engine |
|---|---|---|---|
| KNORR-BREMSE |
FAQ
What is the function of a 4-circuit protection valve?
It manages air distribution by splitting the supply into four separate circuits, preventing total brake failure if one circuit loses pressure.
What are the technical port specifications for this valve?
The device features one M22x1.5 port and four M16x1.5 ports, designed for standard heavy commercial pneumatic connections.
How do the opening and closing pressures work?
The valve maintains an opening pressure of 7 BAR and a closing pressure of 4.5 BAR across its output ports to ensure precise regulation.
Which systems is this component compatible with?
This part is compatible with Knorr-Bremse systems used in heavy commercial vehicle braking architectures.
What are the OE reference numbers of this part?
303.02.0081 directly replaces Knorr-Bremse OE number AE4187.