301.03.0028 Complete, Air Dryer Valve
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301.03.0028 KNORR-BREMSE Complete, Air Dryer Valve

301.03.0028

Summary

●Heater: 24 V ●Port 1: M22x1,5 ●Port 21: M22x1,5 ●Pressure: 8,1 BAR ●Port 22: M12x1,5 ●Port 4/23: M12x1,5

EAN Code8699031079912
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Description

The technical precision of this air dryer valve ensures consistent pneumatic performance within the heavy commercial vehicle brake system. Designed as a high-strength component, it manages air filtration and moisture removal to protect downstream pneumatic circuits from contamination and pressure fluctuations.

This component is the OE-equivalent of the KNORR-BREMSE II30448 Complete, Air Dryer Valve used in KNORR-BREMSE and MAN systems. It is specifically engineered to meet the rigorous demands of heavy-duty service environments, ensuring compatibility with original equipment standards for both KNORR-BREMSE (II30448, II30448-B, II30448AT, II30448N50, K049813, LA 8234) and MAN (81.52102-6023) vehicle architectures.

Workshop technicians should note the specific port configurations (M22x1,5 and M12x1,5) and the 24 V heater requirement during assembly. Regular maintenance of the air dryer system is essential to prevent moisture buildup in the brake system, ensuring optimal safety and operational longevity for fleet vehicles.

Proper installation of this valve ensures the integrity of the pneumatic lines by maintaining a steady 8,1 BAR pressure threshold. This component is critical for preventing air quality degradation in heavy commercial vehicle braking applications.

Technical Specifications

Heater24 V
Port 1M22x1,5
Port 21M22x1,5
Pressure8,1 BAR
Port 22M12x1,5
Port 4/23M12x1,5

Other OEMs

KNORR-BREMSE

  • II30448
  • II30448-B
  • II30448AT
  • II30448N50
  • K049813
  • LA 8234
  • LA8234

MAN

  • 81.52102-6023
  • 81521026023

Related Products

Repair Kits

Vehicles Used

BrandModelEngine
KNORR-BREMSE
MAN

FAQ

Which vehicle makes are compatible with this air dryer valve?
This part is designed for compatibility with KNORR-BREMSE and MAN systems, specifically matching OE codes II30448, II30448-B, II30448AT, II30448N50, K049813, LA 8234, and 81.52102-6023.
What is the required voltage for the heater component?
The component is equipped with a 24 V heater to ensure functional reliability in cold heavy commercial vehicle environments.
Can I use this part for light commercial vehicles?
No, this is a heavy-duty component designed specifically for heavy commercial vehicles and compatible with systems from KNORR-BREMSE and MAN.
What are the port specifications for installation?
The unit features Port 1 (M22x1,5), Port 21 (M22x1,5), Port 22 (M12x1,5), and Port 4/23 (M12x1,5) for precise assembly.
What operating pressure does this valve handle?
The unit is engineered to function optimally at a pressure of 8,1 BAR within the pneumatic brake system.