Blower Configurations

Many positive displacement blowers and vacuum pumps can be configured in different orientations to work with the flow of air or gas in your system. Both the Roots Universal RAI series and Roots RAM series have this capability. For other...

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Sutorbilt 8000 Blower Series Performance Data

Pressure and Vacuum performance data for the Sutorbilt 8000 series of bi-lobe positive displacement blowers produced by Gardner Denver.

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How To Identify Your Blower Model

If you are not sure which model of blower you may have in your facility, there are several ways to identify your unit or gather information that will help with the identification.

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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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Velocity of a Gas through Schedule 40 Pipe

Quickly estimate the velocity of a gas through Schedule 40 Pipe.

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Roots RAI Series

Roots RAI Rotary Positive Displacement Blower

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Silencer Sizing

Positive Displacement blowers have two impellers that trap a "pocket" of air each time they sweep by the inlet and discharge connection. A pressure pulse is created each time this occurs. This pressure pulse creates noise and vibration. Silencers can...

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Material Data for Plates and Sheets

Material Data for Plates and Sheets including lbs/ft2 and conversions from inches to millimeters.

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Conversions

A quick reference guide to conversion factors

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Obsolete Unit

Tabular data for the Roots Whispair Max and Roots AF Positive Displacement Blowers

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Blower and Vacuum Pump Heat Rejection Calculation

Room ventilation requirements must be taken into account when a blower or vacuum pump package is installed inside a building. Use this calculation method to determine the package heat rejection rate.

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Roots Whispair Max Rotary Positive Blowers

The Roots Whispair Max was originally released in the 1970's as the "Next Generation" of rotary positive displacement blowers. They were designed to operate at much higher speeds then the units they were designed to replace. The Whispair Max was...

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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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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...

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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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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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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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Glossary

This glossary provides definitions to terms commonly used in blower and vacuum pump applications.

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Positive Displacement Blower Nomenclature

Many positive displacement blower manufacturers use a similar naming nomenclature to identify some key design facts about their blowers. Knowing the gear size and impeller length can give you a quick understanding of the units capabilities.

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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...

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Sutorbilt Blower Legend Series “P” Performance Parameters

This article summarizes the performance parameters of the Sutorbilt Blower Legend "P" Series positive displacement blowers and vacuum pumps. The feature changes between the "L" Series and "P" series are also provided that permit higher speeds, higher differential pressures and...

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Roots Rotary Blower AF Series

The Roots rotary blower AF series was obsoleted in the 1980's, but that doesn't mean that they aren't still out there running. This article provides dimensional and performance data as well as typical units that may be used to replace...

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LS 3000 2 Point Level Switch

This is a supplement to the manufacturer's operating instructions condensing the adjustment procedure for REP's separator application.

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Universal Air Filter Element Service Instructions

How and when to clean and maintain your paper, felt and wire mesh air filter elements.

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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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Industrial Noise Reduction

How to calculate a noise level at a distance other then where it is measured. This is a handy method to determine how much noise reduction you will achieve as you move further away from the noise source.

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Elevation Versus Atmospheric Pressure

A table is provided to allow for a quick reference to atmospheric pressure based on elevation in feet. Pressures are provided in PSIA and "HgA.

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Schedule 40 Pipe Data

A quick reference table that gives ID, OD, Flange Diameter, Bolt Circle Diameter, number of bolts and weight per foot. This is an excellent quick reference tool.

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Blower Briefs

Back in the early 1990's, when pdblowers was a newborn company, we published a newsletter. The purpose of the newsletter was to inform and educate our customers or anyone who was unfortnunate enough to get on our mailing list!

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The Optimal Blower Systems Configuration

The best orientation for a rotary positive displacement blower is in a horizontal configuration. The horizontal configuration can be described as vertical airflow or you can draw a line between the shaft ends. If the line is horizontal it is...

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