Several capabilities have been added to the Fisher GX control valve and actuator system range which make it suitable for a wider range of applications. These include the addition of a Whisper Trim III low noise trim and an anti cavitation trim, making the valve system suitable for severe service applications. There is also a cryogenic version which enables use down to -196º C and a design specifically for use in Pressure Swing Adsorption (PSA) skids. To verify cycle life, the PSA design has been successfully tested to withstand over 1 million high speed cycles. The compact and rugged globe-style valve system can control a wide range of process liquids, gasses and vapours. Operations and maintenance savings are delivered through the use of standardised constructions and the predictive diagnostics and performance advantage of the integrally mounted digital valve controller.