Foam producing venturi

Details Foam producing venturi Foam producing venturi

A - Human Necessities

62

C

A62C 31/12 (2006.01) B01F 3/04 (2006.01) B01F 5/04 (2006.01)

Patent

CA 2106526

ABSTRACT A venturi for producing medium expansion foam for use in fire fighting applications. The new venturi contains a swirl inducer bushing near the entry of the nozzle, a two section frustum shaped diffuser, and a plurality of angularly oriented air injector openings. The venturi progressively decreases in cross-sectional area from a discharge point thereof to a throat of the nozzle. The cross-sectional design together with orientation of the air injector permits high quality lasting foam to be produced under a broad fluid supply pressure while minimizing the amount of foam reagent employed.

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