Description

Overview

The Wabco Pressure Protection Valve M22x1.5 (charging valve) helps keep priority air circuits charged before secondary circuits draw air. It holds off flow until system pressure reaches the set point, which helps protect braking and suspension supply during pressure recovery. This valve suits trailer air systems that use M22 x 1.5 ports and require an adjustable pressure protection valve without return flow.

Features

• Adjustable protection setting from 5.3 bar to 7.0 bar
• Nominal charging point set around 6.0 bar
• Two M22 x 1.5 ports for common trailer line fittings
• Without return flow design

Specifications and Materials

• Port threads: M22 x 1.5 (inlet and outlet)
• Charging pressure: 6.0 bar (nominal)
• Range of adjustment: 5.3 bar to 7.0 bar
• Max operating pressure: 13.0 bar
• Type: without return flow

Part number: SP0231.
For technical reference, use the WABCO catalogue entry for the charging valve.

Compatibility and Fitment

Confirm air line routing and port access before installation to avoid kinks or tight bends. This cross-reference listing means this valve is a suitable replacement for the part numbers and applications shown. Some changes in air line plumbing may be required. K000627, DR4253, 4341001250, 314013002

Compliance and Safety

Work on air brake systems is safety-critical, so follow the vehicle manufacturer procedure and workplace safety practices. After installation, leak test and verify the cut-in setting under controlled conditions. Replace damaged hoses or fittings rather than forcing threads to seal.

• Depressurise the system before removing any air lines
• Use correct sealing practice for pneumatic fittings
• Function test the valve before returning the trailer to service

Trailer Applications

This Wabco Pressure Protection Valve M22x1.5 suits trailers with multi-circuit air supply where accessory circuits must wait until a priority circuit reaches the target pressure. It is a common choice when you want a consistent adjustable protection setting across M22 x 1.5 plumbing.

Cross-reference and Suitability

This part cross-references to or suits the following equivalent part numbers and compatible alternatives:

Why Choose ICS Trailers

ICS Trailers supplies fit-for-purpose air brake parts with selection details that help you match ports, adjustment range, and valve type before you order. Browse Air Brake Parts at ICS Trailers.