Excerpt from Rearing Selected Western Cotton Insects in the Laboratory

On the discharge end of the pump, a -inch cross-tee is attached by means of a short -inch nipple. In the two side Openings of the cross-tee, two inch pipe-to-hose adapters are inserted.

For handling the diet, two 6-ft lengths of - inch reinforced heater hose with standard hose fittings attached are normally used. The number of hoses used for dispensing the diet varies; as many as five and as few as two have been used at one time. Opposite the pump side Of the cross-tee, a -inch gate valve is attached between the cross - tee and a -inch bypass hose. This hose is 5 ft long and serves as a transfer hose for emptying the mixer and as a bypass when dispensing. The bypass is necessary since this is a positive displacement pump. This hose also serves to agitate the diet during dispensing. The gate valve is used to unblock the dispensing hoses, which sometimes become partially blocked between batches of diet. The valve can be closed down until the diet is forced through the dispensing hoses. When the hot diet has run through the hoses, nor mal dispensing can be resumed. To add multiple dispensing hoses, double shutoff Y hose connectors can be attached to the side adapters on the cross-tee and hoses are then attached to the adapters. To control diet flow, sweeper nozzles (nelson N-404c) are attached on the ends of the dispensing hoses. The ends of these nozzles are made with threaded adapters to which sweeper nozzles (nelson N - 26b) are attached. The hose nozzle allows the Operator to regulate the amount of diet going through the hoses, and the sweeper nozzle directs the hot diet into a solid stream. The - inch hoses are used for making diet flakes, pink boll worm layered diet, and for filling plastic storage boxes and 16-02 cups. For filling -oz and l-oz cups, the same nozzle arrangement is used, but a inch washing machine hose is substituted for the -inch hose. The smaller diameter hose reduces the flow of diet so that the smaller cups can be filled uniformly (fig.

The general procedure for using the pump and holding kettle is as follows (1) To keep the diet hot, the water jacket of the kettle is filled with hot water prior to use. (2) Hot water is run through the pump and hoses to warm them up. (3) The diet is mixed in the vertical-cutter-mixer. (4) The diet is pumped from the mixer to the preheated kettle, using the bypass hose. While this is taking place, the dispensing hoses can also be used. (5) When the mixer is emptied, the pump intake hose is connected to the bottom valve of the kettle. When the valve is Opened, it allows the diet to be drawn through the bottom Of the kettle, through the pump, out through the dispensing hoses, and back through the bypass hose to recirculate. By using the kettle as a holding tank, the mixer can be emptied, allowing another batch to be mixed while the diet is being dispensed.

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