303.02.0045 4-circuit protection valve — KNORR-BREMSE
303.02.0045
Summary
This high-strength 4-circuit protection valve features Port 1 (M22x1,5) and Ports 21-24 (M16x1,5). It operates at a pressure of 12 BAR with specific opening/closing thresholds for system safety. Designed for compatibility with KNORR-BREMSE systems.
| EAN Code | 8683457005242 |
|---|
Ready to Order
Compatible OEM Codes
- KNORR-BREMSE II39775F AE 4619
Description
The pneumatic brake system relies on precise pressure regulation to ensure safety and reliability during heavy-duty operations. This 4-circuit protection valve serves as a critical component, managing air distribution across multiple circuits to maintain stable braking performance.
The 303.02.0045 is the OE equivalent of the KNORR-BREMSE AE4619 and II39775F components used in high-specification braking systems. It is engineered to meet the rigorous demands of heavy commercial vehicle maintenance, ensuring consistent pressure distribution across all four circuits. The device features a robust structure designed for long-term durability in demanding environments.
Technical specifications include a primary port of M22x1,5 and four secondary ports of M16x1,5. With an operating pressure of 12 BAR and specific opening/closing thresholds (such as 7,2 BAR for Port 21 and 6,3 BAR for Port 23), it provides precise control over pneumatic circuits. This part is essential for maintaining the integrity of the pneumatic brake architecture.
Technicians should verify the specific opening and closing pressure requirements to ensure perfect fitment within the existing system architecture. Regular inspection of port connections and pressure stability is recommended to ensure optimal performance during service.
The 303.02.0045 is the OE equivalent of the KNORR-BREMSE AE4619 and II39775F components used in high-specification braking systems. It is engineered to meet the rigorous demands of heavy commercial vehicle maintenance, ensuring consistent pressure distribution across all four circuits. The device features a robust structure designed for long-term durability in demanding environments.
Technical specifications include a primary port of M22x1,5 and four secondary ports of M16x1,5. With an operating pressure of 12 BAR and specific opening/closing thresholds (such as 7,2 BAR for Port 21 and 6,3 BAR for Port 23), it provides precise control over pneumatic circuits. This part is essential for maintaining the integrity of the pneumatic brake architecture.
Technicians should verify the specific opening and closing pressure requirements to ensure perfect fitment within the existing system architecture. Regular inspection of port connections and pressure stability is recommended to ensure optimal performance during service.
Technical Specifications
| Port 1 | M22x1,5 |
|---|---|
| Port 21 | M16x1,5 |
| Port 22 | M16x1,5 |
| Port 23 | M16x1,5 |
| Port 24 | M16x1,5 |
| Operating Pressure | 12 BAR |
| Opening Pressure 21 | 7,2 BAR |
| Opening Pressure 22 | 7,4 BAR |
| Opening Pressure 23 | 6,3 BAR |
| Opening Pressure 24 | 7 BAR |
| Closing Pressure 21 | 5,5 BAR |
| Closing Pressure 22 | 5,5 BAR |
| Closing Pressure 23 | 4,5 BAR |
| Closing Pressure 24 | 5,5 BAR |
| Pressure | MAX 20 BAR |
Other OEMs
KNORR-BREMSE
- AE4619
- II39775F
- AE 4619
Related Products
Repair Kits
Vehicles Used
| Brand | Model | Model Type | Engine |
|---|---|---|---|
| KNORR-BREMSE |
FAQ
What are the compatible OEM reference numbers for this part?
This product is compatible with the following OE references: AE4619, II39775F.
What is the primary function of this 4-circuit protection valve?
It regulates and protects the air pressure across four distinct circuits within the pneumatic braking system to ensure operational safety.
What are the thread sizes for the ports?
The main port (Port 1) is M22x1,5, while ports 21, 22, 23, and 24 are M16x1,5.
Is this part suitable for heavy commercial vehicle braking systems?
Yes, it is designed specifically for heavy commercial vehicle braking systems requiring high-strength components and precise pressure regulation.
At what pressure does Port 21 open?
Port 21 has an opening pressure of 7,2 BAR and a closing pressure of 5,5 BAR.