Venturi pump

摘要

A venturi pump comprising a throat member (14) defining a flow passage (16) including a throat region (16b), and at least one feed port (18) communicating with the throat region (16b), wherein a first part (24) of the throat region (16b) immediately downstream of the or each feed port (18) is of greater cross-sectional area than a second part (22) of the throat region (16b) immediately upstream of the or each feed port (18). The throat member (14) may take the form of an insert to be received within a flow passage (12) provided in a pump housing (10). <IMAGE>