Rules of Thumb
Compressors and Vacuum Pumps
  1. 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.
  2. 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.
  3. 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
Cooling Towers Size Seperation of Particles Utilities, Common Specifications Vessels (Storage Tanks) Crushing and Grinding
C O N T A C T   G L Y D E