303.02.0073 4-circuit protection valve
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303.02.0073 4-circuit protection valve

303.02.0073

Summary

●Port 1: M22x1,5 ●Port 21: M16x1,5 ●Port 22: M16x1,5 ●Port 23: M16x1,5 ●Port 24: M16x1,5 ●Opening Pressure 21: 6,5 BAR ●Opening Pressure 22: 6,5 BAR ●Opening Pressure 23: 6,5 BAR ●Opening Pressure 24: 6,5 BAR ●Closing Pressure 21: 4 BAR ●Closing Pressure 22: 4 BAR ●Closing Pressure 23: 4 BAR ●Closing Pressure 24: 4 BAR

EAN Code8683457009325
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Description

The technical function of this component is to ensure the stability of the pneumatic braking system by regulating air pressure across multiple circuits. This high-strength component is essential for maintaining consistent air distribution in heavy commercial vehicle brake systems, providing critical safety during operation.

303.02.0073 is the OE-equivalent of the KNORR-BREMSE AE 4168, I75300, and K019911N00 used in MERCEDES BENZ and VOLVO heavy commercial vehicles. It also serves as a direct replacement for the VOLVO 1130617 and 1593150 models, ensuring exact fitment for compatible braking systems.

For workshop technicians, this part features a Port 1 size of M22x1,5 and four M16x1,5 ports (Ports 21, 22, 23, and 24). The valve is engineered with a standardized opening pressure of 6,5 BAR and a closing pressure of 4 BAR across all circuits to maintain system integrity during maintenance and daily service intervals.

Proper installation of this protection valve is vital for the continuous performance of the pneumatic circuit. It is designed to withstand heavy-duty service conditions within the brake system of trucks and buses to prevent pressure drops that could affect vehicle control.

Technical Specifications

Port 1M22x1,5
Port 21M16x1,5
Port 22M16x1,5
Port 23M16x1,5
Port 24M16x1,5
Opening Pressure 216,5 BAR
Opening Pressure 226,5 BAR
Opening Pressure 236,5 BAR
Opening Pressure 246,5 BAR
Closing Pressure 214 BAR
Closing Pressure 224 BAR
Closing Pressure 234 BAR
Closing Pressure 244 BAR

Other OEMs

KNORR-BREMSE

  • AE 4168
  • I75300
  • K019911N00
  • AE4168

MERCEDES BENZ

  • 001 431 59 06
  • A0014315906

VOLVO

  • 1130617
  • 1593150

Related Products

Repair Kits

Vehicles Used

BrandModelEngine
KNORR-BREMSE
MERCEDES BENZ
VOLVO

FAQ

What are the compatible OEM numbers for this part?
This product is compatible with AE 4168, I75300, K01991N00, Mercedes Benz 001 431 59 06, and Volvo 1130617/1593150.
What are the port specifications for the installation?
The valve features one M22x1,5 port (Port 1) and four M16x1,5 ports (Ports 21, 22, 23, and 24).
At what pressure does the valve open and close?
The opening pressure for all four circuits is set at 6,5 BAR, while the closing pressure is set at 4 BAR.
Is this part suitable for heavy commercial vehicles?
Yes, it is designed specifically for heavy commercial vehicle brake systems including those from Mercedes Benz and Volvo.
Which vehicle brands can use this protection valve?
This part is compatible with systems from KNORR-BREMSE, MERCEDES BENZ, and VOLVO.