The Venturi-style pneumatic air blower has a galvanized steel housing and cast aluminum base, and uses compressed air or steam to ventilate vapors and fumes from underground storage tanks or other below-ground locations.

It has no moving parts and hence low maintenance. The housing is made from galvanized steel for corrosion resistance and can be replaced when it shows signs of wear. The base is made from lightweight cast aluminum and comes in standard base sizes. The blower comes with a static grounding lug to dissipate static electricity and prevent accidental ignition of vapors or fumes. It has a built-in steel handle for carrying. The air blower can operate at pressures up to 140 psi.

Venturi-style blowers, also known as Air Horns or Eductors, use the principles of the Venturi effect to vent hazardous vapors and fumes from below-ground sources. The base of the blower is connected to the underground tank or source where the fumes and vapors are present, and compressed air or steam is brought into the blower through a nozzle. Its narrow base constricts the compressed air or steam, which increases its velocity as it moves toward the vent at the top of the horn. This decreases the ambient pressure in the horn and creates a partial vacuum, drawing fumes up through the base and out through the vent.


Model 50 PSIG 70 PSIG 90 PSIG 50 PSIG 70 PSIG 90 PSIG
Total Air Flow (CFM) Air Consumed (CFM)
BL – 4AVH 935 1274 1422 38 535 64
BL – 6 AVH 1211 1429 1580 38 53 64
BL – 8 AVH 2770 3340 3752 76 99 127
BL – 10 AVH 3785 4562 5041 117 152 197
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