A relay valve is an air-operated valve typically used in air brake systems to remotely control the brakes at the rear of a heavy truck or semi-trailer in a tractor-trailer combination. Relay valves are necessary in heavy trucks in order to speed-up rear-brake application and release, since air takes longer to travel to the rear of the vehicle than the front of the vehicle, where the front service brakes, foot-valve, parking-control valve, and trailer-supply valve (if applicable) are located.
The relay valve within a vehicle is an air pressure operated device that collects signals from the driver when they apply the brake. It is commonly found on larger vehicles, such as buses and tractor trailers, because of their size. The velocity that is built up behind these vehicles is substantially higher than an average vehicle would be, so in order to stop properly a special braking system must be in place.

Market Analysis and Insights: Global Relay Valve Market
The global Relay Valve market was valued at US$ XX in 2020 and will reach US$ XX million by the end of 2027, growing at a CAGR of XX% during 2022-2027.

Global Relay Valve Scope and Market Size
The global Relay Valve market is segmented by company, region (country), by Type, and by Application. Players, stakeholders, and other participants in the global Relay Valve market will be able to gain the upper hand as they use the report as a powerful resource. The segmental analysis focuses on sales, revenue and forecast by region (country), by Type and by Application for the period 2016-2027.

Segment by Type
Crack Pressure: <2 Psig
Crack Pressure: 2-4 Psig
Crack Pressure: >4 Psig

Segment by Application
Bus
Tractor
Trailer
Truck
Others

The Relay Valve market is analysed and market size information is provided by regions (countries). Segment by Application, the Relay Valve market is segmented into North America, Europe, China, Japan, Southeast Asia, India and Other Regions.

By Company
Bendix
Haldex
Meritor
Northstar
Pro Trucking Products
Sealco
WABCO
Fleet Products Ltd
Zibo Invalides Auto Parts
Jingjiang Dacheng Automation Engineering