Rules of Thumb

Compressors and Vacuum Pumps Fans are used to raise the pressure about 3% (12 in. H20); blowers are used for differentials of about 40 psig; and compressors for higher differentials. Theoretical adiabatic horsepower: Phpt = (FT1/8,130a)((P2/P1)a-1) where Phpt = power, hp; F = flowrate, scfm; T1 = inlet temperature, R; P2 and P1 = outlet and inlet pressures, psia; a = (k-1)/k, where k = ratio of specific heats. Outlet temperature: T2 = T1(P2/P1)a 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