VENTURI EDUCTOR WITH ADJUSTABLE FLOW RESTRICTOR

摘要

A venturi eductor comprising a flow passage 2 for a first liquid, a dispensing passage 3 with an opening 4 into the flow passage 2 to allow a second liquid to be drawn therethrough and into a first liquid flowing through the flow passage 2, and a flow restrictor 5 in the dispensing passage 3, in which the flow restrictor 5 comprises a body 6 with a plurality of nozzles 7 passing therethrough with varying sizes of orifice 8, which body is movable between a first position in which a first 7' of said nozzles 7 is disposed in the path of the second liquid, and further positions in each of which a further of said nozzles 7 is disposed in the path of the second liquid.