Description

Overview

The relay valve vertical delivery ports configuration is used to speed service brake response on long wheelbase trailers by relaying control air close to the axle group. This relay valve reduces line losses, improves apply and release times, and helps keep pedal feel consistent under varying loads. Consequently, workshops can route plumbing neatly while maintaining dependable braking performance.

Features

• Vertical delivery ports to suit compact, downward hose runs on trailer frames
• High-capacity relay action for quick, repeatable service brake response
• 4 psi crack pressure for predictable modulation across load conditions
• NPT porting sized for common Australian heavy-trailer air systems

Specifications and Materials

Model: Suits R-14 with vertical delivery ports.
Supply port: 1/2″ NPT.
Delivery ports: 1/2″ NPT (4).
Service (control) port: 1/4″ NPT.
Balance port: 1/8″ NPT beneath exhaust cover.
Crack pressure: 4 psi.
Part number: AB8382P.
For functional background and R-14 family details, refer to the Bendix R-14 relay valve overview Bendix R-14 relay valve overview

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.
103010, 103125, 103125X, 102855, 102858, 103024, 103112, 103230, 104146, 108500, 109788, 10130595, 5311924, 5311924000, KN28071, KN28140, 763355, 445401630A, 20QE460, 15503793, 15535017, 1677540C91, R955103010, 1349880, P103480, 5004B5, 17340001, K295263R, S8255, 401169, 14018, 29762, 1092930, 722010027, 61170189, R14H

Compliance and Safety

Install to manufacturer practice, torque pneumatic fittings correctly, and leak-test the system. Then confirm service and parking brake performance against workshop standards and applicable roadworthiness checks before releasing the vehicle.

Trailer Applications

Use this relay valve on heavy trailer service brake circuits where a frame-mounted unit with vertical outlets simplifies hose runs. Typically it is mounted near the axle group to minimise delay, reduce hose strain, and improve serviceability.

Cross-reference and Suitability

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

Why Choose ICS Trailers

We publish straight specs and usable interchange data so workshops can complete repairs with confidence. Browse Air Brake Parts at ICS Trailers