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We have designed three different lever systems with the current design presented here. (Please label the figure and what you are showing in each.)**Harry can you work on this section? Label components and describe each item in detail. Actually, I think we have an update version that shows the eye-bolts. Let me know when you are working on this and I will email it to you.
Lever Arm
-The lever arm is a 1" x 1" aluminum bar classified by the 80/20 Inc. as 1010. The length of the lever arm was decided to be 0.80 meters to account for the variation in the water level of the entrance tank from the overall head loss in the plant.
There are a number of constraints in the design of this lever arm. First, we need to facilitate a way to attach the floats and counter-weight. Secondly, we must have a way to adjust the distance the orifice travels down the arm. It was also requested that the operators be given a means to manually "shut off" the flow. This can be accomplished by moving the orifice directly in line with the pivot. We have also attempted to accommodate a second slide to facilitate attaching a second dosing pH control system. It is preferred that both slides operate on the same side of the lever to allow the operator easier access.
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