Compressors and related equipment on a gas transmission system are contained in compressor stations. Stations consist of one or more compressors, typically inside of a building.
In addition to the compressors, key components in the station include:
- The prime mover – the engine that drives the compressor
- Controls – devices that allow settings on compressors, prime movers, and valves to be adjusted
- Support systems – mechanical systems that provide starting power, fuel management, gas cooling, lubrication, and water cooling
- The emergency shutdown system (ESD) – system that quickly shuts down the prime mover and compressor when sensors indicate events such as fires or gas leaks have occurred in the compressor building
- Station piping and valving – gas pipes that are configured to allow flow and bypass of gas to specific components or the whole station and valves that control gas flow including blowdown valves used to release gas to the atmosphere