Answer:
Air Compressor Governor
Explanation:
The governor regulates how much air is pumped into the air pumping stations by the air compressor. The governor prevents the compressors from blowing air whenever the air pressure exceeds the "cut-out" level (about 125 pounds per square inch or "psi").
The transition from 85 to 100 psi will take no more than 45 seconds. During the build-up, keep an eye on the air pressure gauge to guarantee appropriate air system performance.