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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Lubrication Points for Roots Universal RAI®

Lubrication Points on the Roots Universal RAI® in Vertical and Horizontal configurations...
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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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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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