Abstract: A fluid compression system includes a compressor operable to produce a first flow of compressed fluid and a refrigerated dryer coupled to the compressor and operable to separate the first flow of compressed fluid into a second flow of compressed fluid and a flow of liquid. A first sensor is positioned to measure a property of the second flow of compressed fluid, and a controller is operable to initiate operation of the refrigerated dryer at a first time and at least partially in response to the measured property, and to initiate operation of the compressor at a second time. The first time is before the second time.

Abstract: A gas compression system is operable to deliver a flow of compressed gas to a point of use. The gas compression system includes a compressor that is operable to produce a flow of compressed gas at a first pressure, a motor operable to drive the compressor at a compressor speed, and a gas treatment member positioned to receive the flow of compressed gas from the compressor and deliver the flow of compressed gas to the point of use at a second pressure. A controller is operable to vary the compressor speed in response to a difference between the first pressure and the second pressure.

Abstract: A fluid compression system includes a fluid compression device which pressurizes fluid. A pressure sensor senses pressure generated by the compression device. A control device indicates operating parameters and functions of the compression device, graphically displays the parameters and functions, sets limits of the parameters and controls the compression device in response to any of the parameters reaching a preset level of a corresponding function. A reverse rotation sensor determines when the compression device is operating in an incorrect direction by the initial pressure sensed by the pressure sensor after startup of the compression device, and in response, shuts off the compression device.