301.03.0028 MAN Compatible Air Dryer Valve
301.03.0028
Summary
This heavy-duty air dryer valve is designed for MAN vehicles, featuring a 24 V heater and specific port configurations including M22x1,5 and M12x1,5. It ensures reliable moisture removal to protect the pneumatic brake system from corrosion. Equivalent to OE Knorr-Bremse II30448 and MAN 81521026023.
| EAN Code | 8699031079912 |
|---|
Ready to Order
Compatible OEM Codes
-
KNORR-BREMSE
- LA 8234
- K049813
- II30448N50
- II30448AT
- II30448-B
- II30448
-
MAN
- 81.52102-6023
Description
What does an air dryer valve do?
This air dryer valve plays a critical role in the pneumatic brake system by managing air quality and moisture levels. By effectively removing contaminants from the air supply, it prevents corrosion and freezing within the brake lines, ensuring consistent braking performance for heavy commercial vehicles. This component is manufactured using high-strength components to withstand rigorous operating conditions.Vehicle compatibility and fitment
This specific unit is compatible with MAN vehicles and meets the requirements for systems used in heavy commercial vehicle applications. It is an OE-equivalent solution designed to maintain system integrity without compromising performance.Installation and maintenance
Installation requires careful attention to the port connections, specifically the M22x1,5 and M12x1,5 thread sizes. Technicians should ensure the 24 V heater connection is secure to prevent moisture buildup during cold weather operations. Regular inspection of the valve ports is recommended to ensure no debris interferes with the pneumatic flow.System reliability and checks
To maintain optimal braking safety, verify that all port seals are intact during replacement to prevent pressure drops in the system.OE cross-reference
301.03.0028 (Air Dryer Valve Air Dryer Valves) is the equivalent of the Knorr-Bremse and MAN OE numbers. This part directly replaces Knorr-Bremse OE numbers II30448, II30448B, II30448AT, II30448N50, K049813, LA8234. It also replaces MAN OE number 81521026023.Technical Specifications
| Heater | 24 V |
|---|---|
| Port 1 | M22x1,5 |
| Port 21 | M22x1,5 |
| Pressure | 8,1 BAR |
| Port 22 | M12x1,5 |
| Port 4/23 | M12x1,5 |
Other OEMs
KNORR-BREMSE
- LA8234
- LA 8234
- K049813
- II30448N50
- II30448AT
- II30448-B
- II30448
MAN
- 81521026023
- 81.52102-6023
Related Products
Repair Kits
Compatible Vehicles
| Brand | Model | Model Type | Engine |
|---|---|---|---|
| KNORR-BREMSE | |||
| MAN |
FAQ
What is the function of the heater in this air dryer valve?
The integrated 24 V heater prevents moisture from freezing within the valve during cold weather, ensuring reliable air delivery.
Which vehicle brands is this part compatible with?
This component is designed for compatibility with MAN vehicles and maintains performance in heavy commercial vehicle systems.
What are the connection specifications for this valve?
The valve features specific port sizes: M22x1,5 and M12x1,5 threads to ensure a precise fit within the pneumatic system.
How can I know if my air dryer valve needs replacement?
If you notice moisture in the air tanks or inconsistent braking performance, inspect the valve for leaks or blockages.
What are the OE reference numbers of this part?
301.03.0028 directly replaces Knorr-Bremse OE numbers II30448, II30448B, II30448AT, II30448N50, K049813, LA8234. It also replaces MAN OE number 81521026023.