303.02.0007 4-circuit protection valve
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303.02.0007 4-circuit protection valve — VOLVO

303.02.0007

Summary

The 303.02.0007 4-circuit protection valve is a high-precision pneumatic component engineered for heavy commercial vehicle brake systems. It features Port 1: M22x1,5 and Ports 21-24: M16x1,5, operating at a maximum pressure of 20 BAR to ensure optimal system safety and pressure regulation.

EAN Code8699031096223
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Description

The heavy duty 4-circuit protection valve is engineered to maintain critical pneumatic stability within the braking system of heavy commercial vehicles. This component functions as a vital pressure regulator, ensuring that air circuits are isolated and protected during pressure fluctuations to maintain consistent braking performance. Designed with high-strength components, it provides reliable service in demanding environments.

303.02.0007 is the OE equivalent of the KNORR-BREMSE AE 4604 4-circuit protection valve used in VOLVO systems including references 20382309, 20452151, 20716313, 20755195, and 3197588. This part ensures seamless integration with compatible vehicle brands and maintains the strict pressure thresholds required for heavy-duty transport safety.

Technical specifications include a Port 1 size of M22x1,5 and four M16x1,5 ports (21 through 24). The device operates with a standard operating pressure of 12 BAR, featuring specific opening pressures for Port 21/22 at 6,3 BAR and Port 23/24 at 5,8 BAR. Workshop technicians should ensure all port connections are seated correctly to prevent pneumatic leaks during routine maintenance or assembly.

Technical Specifications

Port 1M22x1,5
Port 21M16x1,5
Port 22M16x1,5
Port 23M16x1,5
Port 24M16x1,5
Operating Pressure12 BAR
Opening Pressure 216,3 BAR
Opening Pressure 226,3 BAR
Opening Pressure 235,8 BAR
Opening Pressure 245,8 BAR
Closing Pressure 214,8 BAR
Closing Pressure 224,8 BAR
Closing Pressure 233,8 BAR
Closing Pressure 243,8 BAR
PressureMAX 20 BAR

Other OEMs

KNORR-BREMSE

  • AE 4604
  • AE4604

VOLVO

  • 20382309
  • 20452151
  • 20716313
  • 20755195
  • 3197588

Related Products

Repair Kits

Vehicles Used

BrandModelEngine
KNORR-BREMSE
VOLVO

FAQ

Which vehicle models is this part compatible with?
This part is compatible with VOLVO (references: 20382309, 20452151, 20716313, 20755195, 3197588) and KNORR-BREMSE (AE 4604) systems.
What are the specific port sizes for this protection valve?
The unit features one M22x1,5 port (Port 1) and four M16x1,5 ports (Ports 21, 22, 23, and 24) for secure pneumatic connections.
What is the operating pressure range for the component?
The component operates at a standard pressure of 12 BAR, with a maximum pressure capacity of up to 20 BAR.
Can this part be used as an OE replacement for AE 4604?
Yes, the 303.02.0007 is the OE equivalent for the KNORR-BREMSE AE 46 way to ensure original system performance.
What are the opening pressures for the individual circuits?
The opening pressures are set at 6,3 BAR for ports 21 and 22, and 5,8 BAR for ports 23 and 24.