Description

Overview

The R-12 Relay Valve Horizontal Delivery Ports delivers fast, consistent braking response on trailers and dollies. It mounts close to the brake chambers and, as a result, reduces application lag while improving release times. Moreover, fleets gain dependable operation from a proven R-12 layout with horizontal delivery ports.

Features

• R-12 pattern relay valve with horizontal delivery ports for rapid actuation
• 4 psi crack pressure for balanced, predictable response
• Includes mounting bracket for straightforward installation
• Robust porting that supports high airflow and stable brake control

Specifications and Materials

Part number: A18358.
Service port: 1/4 NPT. Supply ports: 3/4 NPT (2). Delivery ports: 1/2 NPT. Total ports: 5. Crack pressure: 4 psi.
For technical background on relay valve function and trailer applications, see the manufacturer technical guide for Bendix relay valves

Compatibility and Fitment

This valve suits R-12 horizontal delivery port layouts and commonly serves long wheelbase vehicles where quick application and release are essential. Install it near the chambers it controls; then verify line routing and port sizes before commissioning.
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.
103009, 104596, 294866, E0917B011, EO917B011, T294866, T294866C, 800238, 065309, 065309X, 102537, 102537X, 103065, 103065X, 106285, 107441, 107441X, 65309, 65309X, E3HT2A449AA, E6HT-2A-449AA, E6HT2A449AA, E6HZ2A449B, F3HS2A449AA, 825553, AKA3927, 10130393, 103009X, KN28060, KN28061, KN28132, KN28140, KN28510, 20QE1320, 20QE347P1, 20QE458, 4C111, 501521R1, 1614572C91, 1677541C91, 182778H1, 23254, 803022, K2953681, 641088, S6006A, 9125, 110410, 20015, 3935413, 034026, 1092929, 25AA0630, 793580, 985407, R12, 103008, 102931

Compliance and Safety

Follow workshop best practice when working on air systems. First, depressurise the system. Next, connect ports by function and torque fittings to spec. Finally, leak test and perform a full brake function check before returning the trailer to service.

Trailer Applications

Typical uses include tandem and tri-axle trailers that need faster delivery to rear service chambers. Additionally, the SCTEG R-12 Relay Valve suits refits where an R-12 style unit replaces an obsolete valve, provided port sizes, mounting and crack pressure align with the original design.

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 sources reliable air brake components and backs them with pragmatic local support. Consequently, you get clear specifications, quick delivery and components that work. Browse the Air Brake Parts range at ICS Trailers