303.02.0033 4-circuit protection valve
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303.02.0033 4-circuit protection valve — SCANIA

303.02.0033

Summary

The 303.02.0033 is a precision-engineered 4-circuit protection valve designed for heavy commercial vehicle brake systems. Featuring Port 1 (M22x1,5) and four M16x1,5 ports, it ensures optimal pressure regulation with specific opening pressures of 6,5 BAR and 7,4 BAR across various circuits to maintain braking integrity.

EAN Code8699031096308
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Description

The high-strength components of this 4-circuit protection valve ensure stable pneumatic regulation within the braking system of heavy commercial vehicles. Designed to manage pressure distribution across multiple circuits, this part plays a vital role in maintaining system safety and response consistency during operation.

This product serves as the OE-equivalent for the SCANIA 1356635, 1431049, and 1935516, as well as the WABCO 934 714 211 0 and MAN ZG.04646-0002 systems used in heavy-duty transport applications. It is fully compatible with vehicle makes including DAF, Volvo, and Alexander Dennis, ensuring precise fitment for specialized transport requirements.

For the workshop technician, this unit features a specialized configuration: Port 1 is M22x1,5 while Ports 21, 22, 23, and 24 are M16x1,5. The technical specifications include opening pressures of 6,5 BAR for most circuits and 7,4 BAR for Port 23, with closing pressures set at 4,5 BAR to ensure reliable circuit isolation during pressure fluctuations. Regular inspection of port seals and pressure thresholds is recommended during routine brake system maintenance to ensure optimal performance.

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
Closing Pressure 214,5 BAR
Closing Pressure 224,5 BAR
Closing Pressure 234,5 BAR
Closing Pressure 244,5 BAR
Opening Pressure 246,5 BAR
Opening Pressure 237,4 BAR

Other OEMs

ALEXANDER DENNIS

  • AB9347142110

DAF

  • 1505406

MAN

  • ZG.04646-0002
  • ZG046460002

ProVia

  • PRO 122 003 0

SCANIA

  • 1337904
  • 1356635
  • 1431049
  • 1935516

VAN HOOL

  • 10740689

VDL

  • 28210202900

WABCO

  • 934 714 128 0
  • 934 714 211 0
  • 934.714.211.0
  • 9347141280
  • 9347142110

Related Products

Repair Kits

Vehicles Used

BrandModelEngine
ALEXANDER DENNIS
DAF
MAN
PACCAR
ProVia
SCANIA
VAN HOOL
VDL
VOLVO
WABCO

FAQ

Which vehicle brands are compatible with this protection valve?
This part is compatible with SCANIA, MAN, DAF, Volvo, and WABCO systems (including codes like WABCO 934 714 211 0 and SCANIA 1356635).
What are the specific port sizes for this unit?
The unit features one M22x1,5 port (Port 1) and four M16x1,5 ports (Ports 21, 22, 23, and 24) for precise pneumatic connection.
Can this be used as an OE replacement for WABCO or MAN?
Yes, it serves as an OE-equivalent for WABCO (934 714 211 0) and MAN (ZG.04646-0002) systems used in heavy commercial vehicles.
What are the pressure thresholds for the circuits?
The opening pressure is typically 6,5 BAR (with Port 23 at 7,4 BAR) and the closing pressure for all ports is set at 4,5 BAR.
Is this part suitable for heavy-duty bus or truck applications?
Yes, it is designed specifically for heavy commercial vehicle brake systems including those from Alexander Dennis and Van Hool.