303.02.0019 Multi-circuit Protection Valve
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303.02.0019 KNORR-BREMSE Multi-circuit Protection Valve

303.02.0019

Summary

●Port 1: M22x1,5 VOSS ●Port 21: M22x1,5 VOSS ●Port 22: M22x1,5 VOSS ●Port 23: M22x1,5 VOSS ●Port 24: M22x1,5 VOSS ●Port 25: M22x1,5 VOSS ●Port 26: M22x1,5 VOSS ●Port 27: M22x1,5 ●Port 28: M22x1,5 ●Opening Pressure 21/22: 9 BAR ●Opening Pressure 22/24: 7,5 BAR ●Closing Pressure 21/22: 7 BAR ●Closing Pressure 22/24: 4,5 BAR

EAN Code8699031080741
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Description

The multi-circuit protection valve is a critical component within the pneumatic brake system of heavy commercial vehicles. It functions to isolate different air circuits, ensuring that a failure or leak in one circuit does not compromise the entire braking performance of the vehicle. This component is engineered with high-strength components to maintain consistent pressure regulation under demanding operational conditions.

303.02.0019 is the OE-equivalent of the KNORR-BREMSE AE 4506, II36008, and II38797FN50 multi-circuit protection valves used in heavy commercial vehicle braking systems. This part is designed to be fully compatible with KNORR-BREMSE hardware and meets strict technical requirements for pressure thresholds and port configurations.

For workshop technicians, this valve features multiple M22x1,5 VOSS ports to ensure precise installation and secure connections. The technical specifications include an opening pressure of 9 BAR for circuits 21/22 and 7,5 BAR for circuits 22/24, with specific closing pressures of 7 BAR and 4,5 BAR respectively. Regular maintenance and checking of port integrity is recommended to ensure optimal system response during service intervals.

Technical Specifications

Port 1M22x1,5 VOSS
Port 21M22x1,5 VOSS
Port 22M22x1,5 VOSS
Port 23M22x1,5 VOSS
Port 24M22x1,5 VOSS
Port 25M22x1,5 VOSS
Port 26M22x1,5 VOSS
Port 27M22x1,5
Port 28M22x1,5
Opening Pressure 21/229 BAR
Opening Pressure 22/247,5 BAR
Closing Pressure 21/224,5 BAR
Closing Pressure 22/244,5 BAR
Closing Pressure 21/227 BAR

Other OEMs

KNORR-BREMSE

  • AE 4506
  • II36008
  • II38797FN50
  • AE4506

Related Products

Repair Kits

Products Used in

Vehicles Used

BrandModelEngine
KNORR-BREMSE

FAQ

Which OEM codes is this part compatible with?
This part is compatible with the following OE codes: AE 4506, II36008, and II38797FN50.
What are the port specifications for this valve?
The valve features multiple ports including Port 1 (M22x1,5 VOSS) and Port 7/8 (M22x1,5) for precise assembly.
What is the opening pressure for the main circuits?
The opening pressure for circuit 21/22 is 9 BAR and for circuit 22/24 is 7,5 BAR.
Is this part suitable for heavy commercial vehicle brake systems?
Yes, it is designed specifically for heavy commercial vehicle pneumatic brake systems using KNORR-BREMSE hardware.
What are the closing pressure values for this model?
The closing pressure is 7 BAR for circuit 21/22 and 4,5 BAR for circuit 24/other related connections.