In-line treble-port venturi connector with supplemental inlet port and low flow baffle

A method for providing a low flow, low pressure inlet for introducing supplemental fluid into a flow of main fluid, comprising:

• immersing a treble-port venturi within the flow of main fluid to direct a portion of the main fluid flow through the venturi, the venturi having an upstream port, a mixing channel, and a downstream port, the upstream port having an inner diameter greater than an inner diameter of the mixing channel, the mixing channel having an inlet port for supplemental fluid;
• connecting the inlet port to a supply of the supplemental fluid external to the main fluid flow;
• and
• obstructing the portion of main fluid flow through the venturi upstream of the inlet port to create a separation zone adjacent to the inlet port.

An inlet tube for introducing a supplemental fluid into main flow within a main flow conduit, comprising:

• an insertion end having an outlet port and a baffle, the baffle forming a partial circumferential extension of the insertion end beyond the outlet port;
• an anchoring flange displaced from the outlet port by an insertion length, projecting radially outward from a longitudinal axis of the inlet tube, and having a spike for anchoring the inlet tube to an inner wall of the main flow conduit, the spike disposed on a surface of the anchoring flange facing away from the insertion end;
• and
• a connecting end extending from the surface of anchoring flange and terminating at an inlet port, the connecting end having a tapered circumferential portion adjacent to the surface of the anchoring flange, a threaded circumferential portion extending from the tapered circumferential portion, a clamping length extending from the threaded circumferential portion, and a tubing barb extending between the clamping length and the inlet port;
• configured so that the insertion length positions the outlet port at an approximate center of the main flow when the inlet tube is anchored to the main flow conduit.