Description

Overview

The R-6 Relay Valve delivers fast, consistent control of trailer air brakes. This R-6 relay valve suits chassis-mounted installations and, as a result, reduces application and release lag to improve stopping performance and balance. Moreover, the compact body simplifies routing on crowded chassis rails.

Features

• R-6 type relay valve for heavy trailer brake systems
• Chassis-mounted layout for straightforward service access
• 1/2in supply, 1/4in service control, twin 3/8in delivery ports
• Designed to cut brake lag and maintain even application across axles

Specifications and Materials

Part number: AB8238A.
Ports: supply 1/2 NPT, service (control) 1/4 NPT, delivery 3/8 NPT (two).
Mounting: chassis mounted, R-6 style layout.
For function and typical configurations, see this manufacturer technical guide.

Compatibility and Fitment

Use this relay valve in heavy trailer air brake systems where an R-6 style valve is specified. Therefore, it suits general freight, tanker, tipper and platform fleets using NPT air lines. Additionally, the porting matches common plumbing practices, so technicians can complete changeovers quickly.
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. 280375, ABC280375, G14-006, R6

Compliance and Safety

Fit the valve according to your workshop procedures and relevant Australian heavy vehicle standards. Then pressure-test each circuit, confirm correct service and emergency operation, and verify balance across axles. Finally, road-test the trailer under load to ensure smooth application and rapid release without wheel lock.

Trailer Applications

This R-6 relay valve suits multi-axle trailers where quick response and reliable release matter. Consequently, it performs well in stop–start metro work and long-haul operations alike. Furthermore, the chassis-mounted format keeps connections accessible, which aids inspections and reduces downtime during scheduled maintenance.

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 proven air brake components, provides practical specification advice, and supports your workshop with dependable availability. In addition, our team helps you match valves to real-world duty cycles for durable results. Choose ICS Trailers for parts that fit and perform. Browse Air Brake Parts at ICS Trailers