Instrument Air System Sample Clauses

Instrument Air System. An instrument air compressor system will be provided to produce clean, dry, instrument quality air. Two (2) 100% capacity air compressors will be included, based on the 4x4x1 Plant configuration. Air compressors will be sized for the worst case instrument air consumption rate with a 20% capacity margin. The system shall allow connection of a portable air supply outside building SA. The instrument air compressor system will include an aftercooler, a moisture separator, receivers (two 100% with a volume of 1000 gallons each), duplex prefilters, redundant air dryers, and duplex afterfilters with isolation and bypass valving, moisture indication (alarm and control), instrumentation and controls. The air dryer will be a dual-tower, heatless, desiccant, automatically regenerating type. Controls will automatically alternate the dryer trains between their operating and regenerating cycles. The receivers will be designed to meet the ASME Boiler and Pressure Vessel Code, Section VIII, Division I. A pressure relief valve and an automatic condensate drain are included with each receiver. All receivers shall be equipped with pressure transmitters. The coalescing prefilter and afterfilter will each be equipped with a differential pressure indicator to indicate when filter replacement is required.