Description

Overview

Pacific SR-2 trailer spring brake valve manages parking and emergency brake control on heavy trailers that meet ADR38/02 requirements. It works as a spring brake relay valve for trailer applications built after July 1998. Additionally, it can replace many SR3 style valves while maintaining predictable brake response. This combination helps fleets standardise on one reliable trailer spring brake valve design.

Features

This SR-2 trailer spring brake valve provides a compact, robust solution for modern air brake systems. Firstly, it uses separate delivery, service reserve and trailer supply ports to simplify plumbing on multi-axle trailers. Secondly, the internal logic protects the service reserve so operators retain controlled emergency braking. Moreover, the design suits ADR38/02 compliant trailers, which supports ongoing roadworthiness. Finally, the valve layout allows straightforward replacement where SR3 valves were previously fitted.

Specifications and Materials

This trailer spring brake valve uses 3/8″ delivery ports to feed the trailer spring brake chambers. The service reserve port is 1/4″, and the trailer supply port is also 1/4″, which suits common trailer air line sizes. These port sizes make retrofits easier on existing Australian trailer air brake installations. Part number: AB8372P. For more detail on SR-2 valve design and operation principles, refer to the manufacturer technical guide for this valve family.

Compatibility and Fitment

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. 5006256, 5005810, ABC3802, C51738, T-294836, SR-38, S6706, K033128

Compliance and Safety

This SR-2 trailer spring brake valve configuration supports trailers built to ADR38/02 requirements when installed in a correctly engineered system. As a result, it helps maintain the required separation between service and emergency braking functions. Installers should mount the valve in a protected location, use quality fittings and hoses, and follow the trailer manufacturer’s recommended piping layout. In addition, routine leak checks and drain-down tests help verify that the valve continues to operate safely over time.

Trailer Applications

Workshops use this trailer spring brake valve on semi-trailers, dog trailers and other heavy combinations with dedicated spring brake circuits. It suits new trailer builds that require ADR38/02 compliance, and it also works well in refurbishment programs where older SR3 valves are due for replacement. Furthermore, the familiar SR-2 style layout assists technicians who already understand standard trailer spring brake plumbing. This reduces time spent tracing lines and speeds up commissioning after a valve change.

Cross-reference and Suitability

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

Use these references during maintenance planning to confirm suitability when superseding older trailer spring brake valve numbers.

Why Choose ICS Trailers

ICS Trailers focuses on heavy vehicle trailer parts, so you get components that match local ADR and fleet requirements. Our team can assist with selecting compatible air brake valves for new builds or rebuild programs. For more matching components in this system, you can browse Air Brake Parts at ICS Trailers for related components.