Description

Overview

The Genuine Sealco spring brake control valve manages parking and emergency functions in heavy vehicle trailer air brake systems. It combines supply, control, delivery and reservoir connections in one body to simplify plumbing and improve response. As a result, it suits fleets that want reliable spring brake operation with straightforward service. Additionally, the design supports consistent performance on multi-axle trailers when installed as part of a correctly balanced system.

Features

• Integrated spring brake control valve body that combines supply, control and delivery functions for compact installation.
• 3/8″ supply and control ports with four 3/8″ delivery outlets that help simplify line routing on multi-axle trailers.
• 1/2″ reservoir port that supports stable air supply to the spring brake circuit in service and park modes.
• Pre-set PPV pressure at 65 psi that helps protect reservoir pressure and maintain predictable spring brake application.

Specifications and Materials

This spring brake control valve uses a durable cast body with threaded NPT ports suited to heavy vehicle air brake plumbing. The supply port is 3/8″ NPT, the control port is 3/8″ NPT, the four delivery ports are 3/8″ NPT and the reservoir port is 1/2″ NPT. Part number: AB8458G.

For more background on how spring brake relay valves operate, refer to the spring brake relay valve overview page

Compatibility and Fitment

This spring brake control valve suits heavy truck and trailer applications that require controlled parking and emergency spring brake actuation. Installers should match port sizes, mounting footprint and PPV pressure to the original equipment to ensure correct function. 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. 110701, 110703, 110903, 110904, 110800, SC110800

Compliance and Safety

A correctly functioning spring brake control valve is critical for safe parking and emergency braking, so qualified technicians should handle installation and testing. Before work begins, technicians must fully de-pressurise the air system and chock wheels to prevent movement. In addition, they should leak-test all joints after installation and verify that the spring brakes apply and release as specified by the vehicle manufacturer. Finally, regular inspections help catch slow leaks or delayed applications that could indicate wear or contamination inside the valve.

Trailer Applications

Workshops use this type of spring brake control valve on prime movers and full trailers where they need dependable parking brake control across several axles. In many applications it works with relay valves, PPV valves and tractor protection valves to manage both service and spring brake functions. Consequently, it suits fleets that operate linehaul, tanker, tipper or general freight trailers that must meet strict braking performance requirements. Furthermore, its port layout allows flexible mounting so technicians can orient the body to suit existing pipe runs.

Cross-reference and Suitability

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

Technicians should still confirm all functions, pressures and port configurations against vehicle documentation before final sign-off.

Why Choose ICS Trailers

ICS Trailers supplies proven air brake components for heavy trailers and supports workshops with practical product knowledge. Our team focuses on reliable parts that match demanding Australian operating conditions, so you can service fleets with confidence. In addition, we hold a wide range of valves, fittings and accessories to help keep downtime low and repairs efficient. Browse Air Brake Parts at ICS Trailers