Pneumatics / Air

     Air Power
 
     Air Compressors
 

  • Compressor RPM = Motor pulley Dia. x Motor RPM / Compressor Pulley Dia.
  • Motor pulley Dia. = Compressor pulley Dia. x Compressor RPM / Motor RPM.
  • Compressor pulley Dia. = Motor pulley Dia. x Motor RPM / Compressor RPM.
  • Motor RPM = Compressor Pulley Dia. x Compressor RPM / Motor pulley Dia.
  • Air compressors are normally rated to deliver 4 to 5 CFM per horsepower at
    100 PSIG discharge pressure.
 
  • Air-compressor-motor amperage draw:

  • 1 Phase
115V - 10 Amps per HP
230V - 5 Amps per HP

  • 3 Phase
230V - 2.50 Amps per HP
460V - 1.25 Amps per HP
 

Air Motors

  • Typically air-motors consume 30 CFM of air at 90 psig per horsepower.
  • Every 2-psig change in pressure equals 1% change in horsepower.

Blowers

  • Air Hp = CFM x Static Pressure (inches of H2O) / 6356
Air Receivers
  • Cubic Feet = Gallons x 0.13368
  • Cubic Inches = Gallons x 231
  • Size air receiver tanks for about 1 gallon capacity per each CFM of rotary compressor capacity.