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SCFM (Standard CFM) vs. ACFM (Actual CFM)

Calculation Method to convert SCFM (Standard Cubic Feet per Minute) to ACFM (Actual Cubic Feet per Minute). The calculation is based on standard conditions of 68°F, 36% relative humidity (RH) and 14.7 PSIA....
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Overhung Load for Roots Positive Displacement Blowers

Proper V-Drive selection is essential to achieve maximum life for your blower and vacuum pump. Improper sizing or installation of a v-belt drive can shorten the life of the blower or even cause failure. Roots has provided a means to calculate the overhung load on the drive bearing and provide...
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Volume and Mass Flow Calculations for Gases

This article provides equations and examples on how to convert mass flow to volumetric flow. These equations can be used in conjuction with SCFM and ACFM calculations....
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Positive Displacement Blower Calculations

Now days we have computer programs that can calculate positive displacement blower performance. They are a time saver and can quickly give you many options. Before selection programs, performance was calculated by hand to determine required performance. These equations will give the user a...
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Lubrication for Rotary Lobe Blowers

Proper lubrication is the key to a long life for your blowers....
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Roots URAI Performance Data

Roots Universal RAI® (URAI) Performance Data includes cfr, 1 PSI Slip, Max ΔT, Shaft Diameter, Max ΔP and maximum vacuum. You can calculate any performance point with this data....
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Sutorbilt Legend ® L Series Performance Data

Sutorbilt® Legend® L series performance data including cfr, slip, max allowable temperature rise, max allowable differential pressure, max allowable differential vacuum, shaft size and connection sizes. This is for the "L" series. As of this publication, Gardner Denver currently manufacturers...
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