Venturi Style Pneumatic Air Blower for ASI-4100

These air movers (air horns) use compressed air or saturated steam as their power source. They operate on the venturi principle, where a small volume of high-velocity air from a compressed air source is drawn through the casting and out the nozzle jets. This creates a venturi action that induces large volumes of low-velocity air to move through the venturi and out the air diffuser. It is recommended to use a minimum 1/2" I.D. hose from the air supply source to the side inlet connection on the blower base. If the air mover is used to supply fresh air to a confined space, the compressor must be equipped with a Grade-D air filtration package of sufficient capacity (cfm). Additionally, a carbon monoxide monitor with an alarm should be installed.

The installation process is as follows: 1) Install the desired coupling, ensuring it is not less than 1/2" in diameter. Attach a grounding wire between the base of the unit and the tank. Do not restrict the internal diameter of the blower base, as this will result in a severe loss of output flow. 2) Securely fasten the air mover in place before turning on the air supply. (Adding long lengths of duct to the air discharge end of the blower horn will cause flow loss.) 3) Connect the compressed air source.

The key specifications of the air mover are: 46.50" overall length, 14.31" base diameter, 14.37" horn diameter, 1" NPT, 13.18" bolt circle, 0.56" base slot, and a weight of 32.3 lbs. The testing and specifications were completed on June 9, 2005, with the following conditions: 81°F, 73% relative humidity, and a barometric pressure of 30.19 inches. The delivery air was generated by an Atlas Copco 375 cfm compressor, with the air pressure regulated by a Wilkerson regulator with a pre-filter and gauge. An inline 400 cfm flow meter was installed on the delivery air line, and air flow measurements were taken using a standard 12-point air outlet cone configuration. The air flow measuring device used was an Extech Instruments Model 451126 vane-style thermo-anemometer.

These air movers are designed to safely ventilate explosive and hazardous vapors or fumes. They have no moving parts and feature a lightweight cast aluminum base. A static grounding lug is standard, and they can operate on either compressed air or steam, with operating pressures up to 140 psi. Larger models are available, with capacities up to 8000 cfm, and users should consult the factory for more information.

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