Rules of Thumb

Utilities, Common Specifications Compressed air at 45, 150, 300 or 450 psig. Instrument air at 45 psig, 0ェ dewpoint. Steam: 15-30 psig, at 250-275ェ; 150 psig, at 366ェ; 400 psig, at 448ェ; 600 psig, at 488ェ, or with 100-150ェ of superheat. Cooling water: supply from a cooling tower is at 80-90ェ; return is at 115-125ェ; return seawater at 110ェ, return tempered water or steam condensate above 125ェ. Cooling air supply at 85-95ェ; temperature approach to process, 40ェ. H I N T S  A N D  R U L E S Drying and Solids Conveyors for Particular Solids Cooling Towers Compressors and Vacuum Pumps Crushing and Grinding Extraction, Liquid-Liquid Crystallatisation from Solution Filtration Heat Exchangers Mixing and Agitation Particle Size Enlargement Piping Pumps Reactors Refrigeration Size Seperation of Particles Utilities, Common Specifications Vessels (Storage Tanks) C O N T A C T   D E S I G N - T H E . C O M