303.02.0027 4-circuit protection valve — KNORR-BREMSE
303.02.0027
Summary
●Port 1: M22x1,5 ●Port 21: M22x1,5 ●Port 22: M22x1,5 ●Port 23: M22x1,5 ●Port 24: M22x1,5 ●Operating Pressure: 13 BAR ●Opening Pressure 21: 6,9 BAR ●Opening Pressure 22: 6,9 BAR ●Opening Pressure 23: 7 BAR ●Opening Pressure 24: 6,9 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
| EAN Code | 8699031092362 |
|---|
Ready to Order
Compatible OEM Codes
- MAN 81.52515-6105 81.52151-6106 81.52151-6105 81.52151-6099 81.52151-6098 81.52151-6095
- KNORR-BREMSE II37460N00 AE 4609
Description
The high-strength design of the 4-circuit protection valve ensures reliable pneumatic control within the brake system. This component manages pressure distribution across multiple circuits to maintain system integrity under heavy-duty operating conditions.
The VADEN ORIGINAL 303.02.0027 is an OE equivalent of the KNORR-BREMSE AE4609 and II37460N00 used in MAN vehicles such as the 81521516095 and 81521516106 systems. This part is engineered to meet strict performance standards for heavy commercial vehicle brake regulation.
Technical specifications include a maximum operating pressure of up to 13 BAR and specialized port sizes of M22x1,5 for precise connectivity. Maintenance technicians should verify the opening and closing pressure thresholds—specifically the 6,9 BAR opening and 4,5 BAR closing pressures—to ensure optimal pneumatic circuit response during routine inspections.
Check the compatibility list for detailed fitment data regarding MAN and KNORR-BREMSE hardware.
The VADEN ORIGINAL 303.02.0027 is an OE equivalent of the KNORR-BREMSE AE4609 and II37460N00 used in MAN vehicles such as the 81521516095 and 81521516106 systems. This part is engineered to meet strict performance standards for heavy commercial vehicle brake regulation.
Technical specifications include a maximum operating pressure of up to 13 BAR and specialized port sizes of M22x1,5 for precise connectivity. Maintenance technicians should verify the opening and closing pressure thresholds—specifically the 6,9 BAR opening and 4,5 BAR closing pressures—to ensure optimal pneumatic circuit response during routine inspections.
Check the compatibility list for detailed fitment data regarding MAN and KNORR-BREMSE hardware.
Technical Specifications
| Port 1 | M22x1,5 |
|---|---|
| Operating Pressure | 13 BAR |
| Opening Pressure 21 | 6,9 BAR |
| Opening Pressure 22 | 6,9 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 |
| Port 21 | M22x1.5 |
| Port 23 | M22x1.5 |
| Port 24 | M22x1.5 |
| Opening Pressure 23 | 7 BAR |
| Opening Pressure 24 | 6,9 BAR |
| Pressure | MAX 20 BAR |
Other OEMs
KNORR-BREMSE
- AE4609
- II37460N00
- AE 4609
MAN
- 81525156105
- 81521519095
- 81521516106
- 81521516105
- 81521516099
- 81521516098
- 81521516095
- 81-52515-6105
- 81-52151-9095
- 81-52151-6106
- 81-52151-6105
- 81-52151-6099
- 81-52151-6098
- 81-52151-6095
- 64521516001
- 64-52151-6001
- 81.52515-6105
- 81.52151-6106
- 81.52151-6105
- 81.52151-6099
- 81.52151-6098
- 81.52151-6095
Related Products
Repair Kits
Vehicles Used
| Brand | Model | Model Type | Engine |
|---|---|---|---|
| KNORR-BREMSE | |||
| MAN |
FAQ
What are the primary OEM cross-references for this part?
The compatible OEM codes include KNORR-BREMSE AE4609, II37460N00, MAN 81521516095, 81521516098, 81521516099, 81521516105, 81521516106, and 81525156105.
Which vehicle systems is this valve compatible with?
This component is designed for compatibility with KNORR-BREMSE systems and MAN heavy commercial vehicle braking architectures.
What are the technical port specifications?
The valve features Port 1 at M22x1,5 and Ports 21, 23, and 24 also utilizing the M22x1,5 specification for standardized installation.
How does the operating pressure function?
The unit operates at a maximum pressure of up to 13 BAR and features specific opening pressures ranging from 6,9 to 7 BAR to ensure proper circuit activation.
When should a technician inspect this component?
Technicians should monitor the closing pressure thresholds (approximately 4,5 BAR) to ensure the pneumatic circuits are sealing correctly during system testing.