Rules of Thumb

Utilities, Common Specifications Compressed air at 45, 150, 300 or 450 psig. Instrument air at 45 psig, 0°F dewpoint. Steam: 15-30 psig, at 250-275°F; 150 psig, at 366°F; 400 psig, at 448°F; 600 psig, at 488°F, or with 100-150°F of superheat. Cooling water: supply from a cooling tower is at 80-90°F; return is at 115-125°F; return seawater at 110°F, return tempered water or steam condensate above 125°F. Cooling air supply at 85-95°F; temperature approach to process, 40°F. 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   G L Y D E