Process plant control

Compressed air is needed for general use and for the pneumatic controllers that usually seiA e for chemical process plant control. Air is often distributed at a pressure of 100 psig. Rotary and reciprocating single-stage or two-stage compressors are used. Instrument air must be dry and clean (free from oil). 

Design of Control Systems for Multivariable Processes Plant Control... 

Guide 2002. A Guide to Design, Operational and Human Interface Issues. Process Plant Control Desks Utilizing Human Computer Interfaces. The Engineering Equipment and Materials Users Association — Publication No 201. 

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