Abstract: A compressor system operable to shutdown in response to a shutdown signal. The compressor system includes a compression device operable between a first speed and a second speed to produce a flow of compressed fluid at a pressure. A blowdown valve is movable between a closed position and an open position in which at least a portion of the flow of compressed fluid passes through the blowdown valve to reduce the pressure of the flow of compressed fluid. A sensor is positioned to measure the pressure and a controller is operable to move the blowdown valve to the open position and set the speed of the compression device to a low set point speed in response to the shutdown signal.

Abstract: A compressor system operable to shutdown in response to a shutdown signal. The compressor system includes a compression device operable between a first speed and a second speed to produce a flow of compressed fluid at a pressure. A blowdown valve is movable between a closed position and an open position in which at least a portion of the flow of compressed fluid passes through the blowdown valve to reduce the pressure of the flow of compressed fluid. A sensor is positioned to measure the pressure and a controller is operable to move the blowdown valve to the open position and set the speed of the compression device to a low set point speed in response to the shutdown signal.

Abstract: An oil seal, scavenge check valve apparatus includes a seal housing having external and oil-flooded sides, a shaft opening and a fluid opening. A shaft is rotatably and sealingly mounted in the shaft opening. A member is sealingly attached to the external side and spaced therefrom for defining a scavenge cavity adjacent the fluid opening. A first end of the fluid opening is in fluid communication with the scavenge cavity and a second end of the fluid opening is in fluid communication with the oil-flooded side. A flexible seal is normally closed to seal the second end of the fluid opening. The seal is responsive to pressure differences between the external and oil-flooded sides for moving between a normally closed and an open position. A backing plate is spaced from the oil-flooded side to limit movement of the flexible seal.