Air brake actuators are commonly used in various types of vehicles and systems that require reliable and efficient braking. Some of the vehicles and systems that use air brake actuators include:

Commercial Trucks and Buses:

Heavy-duty trucks, such as tractor-trailers and dump trucks, often use air brake systems due to their ability to handle the high braking forces required by these large vehicles.
Buses, especially larger models like city buses and long-distance coaches, use air brake systems for their enhanced braking performance and safety.
Trailers:

Many types of trailers, including semi-trailers, flatbed trailers, and tanker trailers, utilize air brake actuators. These trailers are often towed by trucks and rely on the truck's air brake system for braking.
RVs and Motorhomes:

Some recreational vehicles (RVs) and motorhomes are equipped with air brake systems to provide better braking control and efficiency, especially for larger and heavier vehicles.
Construction and Off-Road Equipment:

Certain types of construction equipment, such as concrete mixers, cranes, and excavators, employ air brake systems for their ability to handle heavy loads and ensure safety on construction sites.
Industrial Machinery:

Various types of industrial machinery, such as presses, winches, and material handling equipment, can use air brake actuators for precise braking control in manufacturing and industrial settings.
Railway Systems:

In some railway applications, air brake systems are used to control the braking of trains. These systems provide effective braking force across multiple train cars.
Agricultural Equipment:

Agricultural machinery like tractors, combines, and harvesters can benefit from air brake actuators for safe operation and control, especially when towing heavy loads.
Military Vehicles:

Certain military vehicles utilize air brake systems due to their reliability and ability to perform under varying conditions.
Emergency Vehicles:

Some emergency vehicles, such as fire trucks and rescue vehicles, might use air brake systems to ensure quick and effective braking during emergency responses.
Specialized Vehicles:

Specialized vehicles like armored trucks, mobile command centers, and custom-built vehicles may incorporate air brake systems depending on their specific requirements.
Air brake systems offer advantages such as consistent braking performance, reduced fade during prolonged use, and the ability to distribute braking force across multiple axles. However, it's essential to note that the use of air brake actuators depends on factors such as vehicle weight, required braking performance, and regulatory requirements in different regions.