Fume Hood Fans
Fume Hood Exhaust Fans
Fume Exhaust Fans

Cast Iron
Fume Hood Fans

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Detailed Information

Perchloric Acid Fans

LS Ready Unit
Fume Hood Fans

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Detailed Information

General Information

Forward Curved & Backward Inclined Fan Wheels

The standard Fume Hood Fan is equipped with a low speed (LS) Forward Curved impeller. As an extra cost item, a Backward Inclined (MS) non-overloading impeller is available for sizes 1 and 1-1/4. The standard wheel is manufactured from mill galvanized steel with a cast iron hub. Monel, Stainless steel, Aluminum and coated steel wheels are available for all corrossion and spark resistant applications. All wheels are balanced both statically and dynamically.

V-Belt Drives

Fume Hood Fans have adjustable drives to permit limited changes in fan RPM as may be required by varying conditions. The entire drive is completly contained within the unit framework and the weather cover. Increases in fan speed (by adjusting motor pulley) should not be done without first consulting the applicaton performance table to avoid overloading the motor. Each drive has cast iron sheaves to further improve quiet operation and service life.

High Outlet Velocity Discharge

High Outlet Velocities can eject the fumes/exhaust up hundreds of feet. DF fanís heavy duty construction allows our fans to operate at very high tip speeds, which can generate high outlet velocities. These high outlet velocities send the fumes high above the facility, thus preventing them from re-entering the buildings fresh air systems.


Cast Iron: A basic feature of the Fume Hood Fan is the heavy cast iron housing. Cast Iron is inherently resistant to corrosion and the thick wall will give many years of service, even without our standard protective coatings.
Welded Metal Housings:A basic feature of the LS Ready Unit is the fully welded housing which may be used for higher CFM applications. The housing can be manufactured in Steel, Stainless steel, Aluminum, Nickel-400 (Monel), and other metals.

Where conditions are especially severe, however, the housing and airstream may be coated with vinyl, phenolic, epoxy, Teflon, and other air-dried coatings for added service life.

Weather Cover

Outdoor covers offer ventilated protection for v-belt drive, motor and bearings as well as serving as a saftey guard. These covers are easily removed for convenient access to all moving parts.

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DF Fan Services, Inc.
495 Wegner Drive
West Chicago, IL 60185
Phone: (800) 876-1495
FAX: (630) 876-1497
e-mail: dffan@dffan.com

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