303.02.0068 Compatible 4-Circuit Protection Valve
303.02.0068
Summary
This 4-circuit protection valve is engineered for heavy commercial vehicle brake systems, featuring M22x1.5 and M16x1.5 port configurations. It ensures precise pressure regulation with a maximum operating pressure of 10 BAR, maintaining system integrity across multiple circuits. Equivalent to OE Knorr-Bremse AE4183.
| EAN Code | 8683457009271 |
|---|
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Compatible OEM Codes
-
KNORR-BREMSE
- AE 4183
Description
What does a protection valve do?
This protection valve plays a critical role in the pneumatic brake system by managing air distribution and ensuring circuit isolation. By regulating pressure across multiple lines, it prevents a single leak from compromising the entire braking capability of the vehicle, providing essential safety for heavy commercial vehicles.System compatibility and pressure regulation
The component is designed to function within complex pneumatic architectures, compatible with Knorr-Bremse systems. It features specific pressure thresholds, including an opening pressure of 7 BAR for ports 21 and 22, and a closing pressure of 4.9 BAR for ports 23 and 24, ensuring stable air delivery under varying load conditions.Installation and technical specifications
Technicians should verify port sizes, specifically the M22x1.5 and M16x1.5 connections, during installation to ensure a leak-free seal. Regular inspection of the valve's response to pressure changes is recommended to maintain optimal braking performance and system safety.Maintenance guidance
Consult your authorized distributor for installation guidance and to confirm specific fitment requirements for your fleet's pneumatic components.OE cross-reference
303.02.0068 (4-circuit protection valve) is the equivalent of the Knorr-Bremse OE number. This part directly replaces Knorr-Bremse OE number AE4183.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 |
| Closing Pressure 21 | 6 BAR |
| Closing Pressure 22 | 6 BAR |
| Closing Pressure 23 | 4,9 BAR |
| Closing Pressure 24 | 4,9 BAR |
| Opening Pressure 23 | 6,5 BAR |
| Opening Pressure 24 | 6,5 BAR |
Other OEMs
KNORR-BREMSE
- AE4183
- AE 4183
Related Products
Repair Kits
Compatible Vehicles
| Brand | Model | Model Type | Engine |
|---|---|---|---|
| KNORR-BREMSE |
FAQ
What is the function of this 4-circuit protection valve?
It manages air distribution within the pneumatic brake system, isolating circuits to maintain braking effectiveness even if a leak occurs in one section.
What are the primary port specifications for this component?
The valve features one M22x1.5 port and several M16x1.5 ports to accommodate standard heavy commercial vehicle pneumatic connections.
What is the maximum operating pressure?
This component is designed to operate with a maximum pressure of 10 BAR to ensure reliable performance in demanding environments.
How do I know if the valve needs replacement?
Technicians should look for signs of air leaks or failure to reach specified opening pressures, such as the 7 BAR threshold for specific ports.
What are the OE reference numbers of this part?
303.02.0068 directly replaces Knorr-Bremse OE number AE4183.