What is the primary purpose of the supply tank in an air brake system?

The primary purpose of the supply tank in an air brake system is to store air pressure. This component is essential because it holds compressed air that is generated by the air compressor, allowing the brake system to function effectively. When the brake pedal is applied, the stored air is released to activate the brakes, ensuring that there is adequate pressure to safely and efficiently slow down or stop the vehicle.

While removing contaminants, regulating temperature, and providing emergency air are important aspects of maintaining an air brake system, they are not the primary function of the supply tank itself. The focus of the supply tank is to maintain a reservoir of compressed air ready for use.