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303.02.0087 4-circuit protection valve - KNORR-BREMSE

303.02.0087

Summary

●Port 1: M22x1,5 ●Port 21: M16x1,5 ●Port 22: M16x1,5 ●Port 23: M16x1,5 ●Port 24: M16x1,5 ●Opening Pressure 21: 5,5 BAR ●Opening Pressure 22: 5,5 BAR ●Opening Pressure 23: 5,5 BAR ●Opening Pressure 24: 5,5 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 Code8683457009462
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Compatible OEM Codes

  • KNORR-BREMSE AE 4191

Description

The braking system relies heavily on the precision of pressure regulation to ensure safety and stability. This high-strength component serves as a critical element within the pneumatic circuit, managing the distribution of air pressure across multiple channels to maintain consistent braking performance under various operating conditions.

The 303.02.0087 is the OE equivalent of the KNORR-BREMSE AE4191 used in heavy commercial vehicle systems. It features a specialized configuration with Port 1 at M22x1,5 and four secondary ports (21, 22, 23, and 24) at M16x1,5 each. This component is specifically engineered to meet the rigorous demands of professional workshop technicians and fleet managers.

Maintenance of this part involves checking the opening and closing pressure thresholds to ensure system integrity. The specified opening pressure for all ports is set at 5,5 BAR, while the closing pressure is maintained at 4,5 BAR. Regular inspection of the port connections and seals is recommended to prevent pressure leaks within the braking circuit.

For technical verification, always cross-reference the specific requirements of the vehicle's pneumatic system before installation.

Technical Specifications

Port 1M22x1,5
Port 21M16x1,5
Port 22M16x1,5
Port 23M16x1,5
Port 24M16x1,5
Opening Pressure 215,5 BAR
Opening Pressure 225,5 BAR
Opening Pressure 235,5 BAR
Opening Pressure 245,5 BAR
Closing Pressure 214,5 BAR
Closing Pressure 224,5 BAR
Closing Pressure 234,5 BAR
Closing Pressure 244,5 BAR

Other OEMs

KNORR-BREMSE

  • AE4191
  • AE 4191

Vehicles Used

BrandModelModel TypeEngine
KNORR-BREMSE

FAQ

What is the function of this protection valve?
It serves as a critical component in the pneumatic brake system to manage and protect multiple air circuits.
Which OEM numbers are compatible with this part?
AE4191
What are the port specifications for this component?
The unit features one M22x1,5 port and four M16x1,5 ports (numbered 21 through 24).
What are the pressure thresholds for this valve?
The opening pressure is set at 5,5 BAR and the closing pressure is set at 4,5 BAR for all circuits.
Is this part suitable for heavy commercial vehicles?
Yes, it is designed for professional use in heavy commercial vehicle braking systems.