Simplified Theory of Operation

The operator makes a request for 2 kilograms of chemical (3a) to be delivered to machine (8a) on the operator station (2).

This sends a request to the dispenser controller (1). The controller(1) then opens the appropriate valves, (4a) for the chemical, (7) for the branch and (9b) for the drain. The pump (5) starts and when the correct amount of chemical is pumped through the flow meter (6), it switches off valve(4a). While this is happening, water in the pipe goes to the drain (9b). After a predetermined amount, machine valve (8a) opens and drain valve (9b) closes. This is done to reduce the amount of water that goes in the machine so as to not affect the liquor ratio.

Water is pumped from (4w), pushing the chemical all the way to the machine (8a). After this, a predetermined amount of water is pumped to the drain (9b) to thoroughly clean the pipe for the next cycle.

The controller is configured at installation and knows how much water to pump to get to each machine.