303.02.0072 4-circuit protection valve
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303.02.0072 4-circuit protection valve — KNORR-BREMSE

303.02.0072

Summary

●Port 1: M22x1,5 ●Port 21: M16x1,5 ●Port 22: M16x1,5 ●Port 23: M16x1,5 ●Port 24: M16x1,5 ●Opening Pressure 21: 7 BAR ●Opening Pressure 22: 7 BAR ●Opening Pressure 23: 7 BAR ●Opening Pressure 24: 7 BAR ●Closing Pressure 21: 5 BAR ●Closing Pressure 22: 5 BAR ●Closing Pressure 23: 5 BAR ●Closing Pressure 24: 5 BAR

EAN Code8683457009318
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Description

The heavy duty protection valve is a critical component in the pneumatic braking system of heavy commercial vehicles. It ensures the distribution and regulation of air pressure across multiple circuits to maintain safety and stability during operation. Designed for high-strength components, this valve manages pressure fluctuations effectively to prevent system failure.

303.02.0072 is the OE-equivalent of the KNORR-BREMSE AE 4158 4-circuit protection valve used in heavy commercial vehicle braking systems. This part provides precise pressure regulation and is engineered to meet the rigorous standards required for professional workshop applications and fleet maintenance.

Designed for efficient assembly, this component features specific port dimensions including a main Port 1 of M22x1,5 and four secondary ports (21, 22, 23, 24) of M16x1,5. The opening pressure for all ports is set at 7 BAR, while the closing pressure is set at 5 BAR. Workshop technicians should ensure all connections are tight and compatible with the specified thread sizes to maintain optimal pneumatic performance.

Regular inspection of the valve and its connection points is recommended to ensure the integrity of the brake system's air circuits. This part is specifically designed for heavy commercial vehicle systems where reliability in pressure regulation is paramount.

Technical Specifications

Port 1M22x1,5
Port 21M16x1,5
Port 22M16x1,5
Port 23M16x1,5
Port 24M16x1,5
Opening Pressure 217 BAR
Opening Pressure 227 BAR
Opening Pressure 237 BAR
Opening Pressure 247 BAR
Closing Pressure 215 BAR
Closing Pressure 225 BAR
Closing Pressure 235 BAR
Closing Pressure 245 BAR

Other OEMs

KNORR-BREMSE

  • AE 4158
  • AE4158

Related Products

Repair Kits

Vehicles Used

BrandModelEngine
KNORR-BREMSE

FAQ

What are the technical specifications for the ports?
The valve features Port 1 with M22x1,5 thread and Ports 21, 22, 23, and 24 with M16x1,5 threads.
Which OEM number is this part compatible with?
This product is a direct replacement/equivalent for the KNORR-BREMSE AE 4158 model.
What are the opening and closing pressure settings?
The opening pressure for all four circuits is set at 7 BAR, while the closing pressure is set at 5 BAR.
Is this part suitable for heavy commercial vehicles?
Yes, it is specifically designed for heavy commercial vehicle brake systems requiring reliable air circuit regulation.
Does it fit KNORR-BREMSE systems?
Yes, it is fully compatible with KNORR-BREMSE systems using the AE 4158 reference code.