303.02.0043 KNORR-BREMSE 4-circuit protection valve
303.02.0043
Summary
The 303.02.0043 is a high-strength 4-circuit protection valve designed for heavy commercial brake systems. It features Port 1 (M22x1,5) and Ports 21-24 (M16x1,5) with an operating pressure of 12 BAR and a maximum pressure capacity of 20 BAR. Optimized for KNORR-BREMSE systems.
| EAN Code | 8683457005228 |
|---|
Ready to Order
Compatible OEM Codes
- KNORR-BREMSE II39140FM1 II39140F AE 4615
Description
The VADEN ORIGINAL 303.02.0043 is a critical component within the pneumatic brake system, ensuring regulated air distribution across multiple circuits. Designed with high-strength components, this 4-circuit protection valve manages pressure differentials to maintain system integrity during heavy-duty operation.
This part serves as the OE equivalent for the KNORR-BREMSE AE4615, II39140F, and II39140FM1 models. It is specifically engineered to meet the rigorous demands of the brake system, providing reliable pressure control through its specialized port configuration: Port 1 (M22x1,5) and Ports 21, 22, 23, and 24 (M16x1,5). The 303.02.0043 is the OE equivalent of the KNORR-BREMSE AE4615, II39140F, and II39140FM1 used in professional braking architectures.
Technicians should note the specific opening and closing pressure thresholds for optimal performance: opening pressures range from 8 to 8.3 BAR, while closing pressures are standardized at 5.5 BAR across circuits. Regular inspection of the port seals and pressure regulation intervals is recommended to ensure long-term reliability within the pneumatic circuit.
The component is engineered for precise mechanical response in heavy commercial vehicle braking environments, maintaining stability under varied load conditions.
This part serves as the OE equivalent for the KNORR-BREMSE AE4615, II39140F, and II39140FM1 models. It is specifically engineered to meet the rigorous demands of the brake system, providing reliable pressure control through its specialized port configuration: Port 1 (M22x1,5) and Ports 21, 22, 23, and 24 (M16x1,5). The 303.02.0043 is the OE equivalent of the KNORR-BREMSE AE4615, II39140F, and II39140FM1 used in professional braking architectures.
Technicians should note the specific opening and closing pressure thresholds for optimal performance: opening pressures range from 8 to 8.3 BAR, while closing pressures are standardized at 5.5 BAR across circuits. Regular inspection of the port seals and pressure regulation intervals is recommended to ensure long-term reliability within the pneumatic circuit.
The component is engineered for precise mechanical response in heavy commercial vehicle braking environments, maintaining stability under varied load conditions.
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 | 8 BAR |
| Opening Pressure 22 | 8 BAR |
| Opening Pressure 23 | 8,3 BAR |
| Opening Pressure 24 | 8 BAR |
| Closing Pressure 21 | 5,5 BAR |
| Closing Pressure 22 | 5,5 BAR |
| Closing Pressure 23 | 5,5 BAR |
| Closing Pressure 24 | 5,5 BAR |
| Pressure | MAX 20 BAR |
Other OEMs
KNORR-BREMSE
- AE4615
- II39140FM1
- II39140F
- AE 4615
Related Products
Repair Kits
Vehicles Used
| Brand | Model | Model Type | Engine |
|---|---|---|---|
| KNORR-BREMSE |
FAQ
What is the compatibility of this part?
The valve features Port 1 (M22x1,5) and Ports 21 through 24 (M16x1,5) with an operating pressure of up to 12 BAR and a maximum pressure rating of 20 BAR.
Which OEM reference numbers are compatible with this product?
This product is compatible with the following references: AE4615, II39140F, II39140FM1.
What is the function of a 4-circuit protection valve in a brake system?
A 4-circuit protection valve manages and protects different air circuits within a pneumatic braking system to ensure that a leak in one circuit does not compromise the entire system.
How can I identify if this part is correct for my system?
Verification can be done by checking the port sizes (M22x1,5 and M16x1,5) and comparing the opening/closing pressure requirements against your existing KNORR-BREMSE hardware.
When should a technician replace the protection valve?
Replacement is often necessary if there are visible leaks at the ports or if the pressure regulation (opening/closing thresholds) no longer meets the required operating standards.