Near Intersection of I-35 & I-90 Southern Mn. | With a butterfly style control valve such as you are using there are two plumbing layouts: 1) by-pass control or 2) inline or throttling control
With by-pass control, an alternative path is provided to allow excess flow to return back to the tank. This is done by having the control valve mounted on a Tee prior to the flow meter. When the applied rate exceeds the operator entered target rate, the system will OPEN the control valve to allow more excess to return to the tank and thus less to the ground.
With inline or throttling control, the control valve is placed inline with the flow meter and directly controls the amount that is allowed to go to the ground. With inline or throttling control if the applied rate exceeds the operator entered target rate, the system will CLOSE the control valve slightly to restrict the amount getting to the ground.
The inline or throttling arrangement is commonly used with centrifugal pumps and the throttling valve merely restricts the output of the pump. This is fine with a centrifugal pump as long as there is some flow for cooling. Even then running the centrifugal pump much faster than needed is unnecessary and serves no useful purpose.
However, it appears that you are using a roller pump rather than a centrifugal pump. A roller pump is considered a positive displacement style of pump where the flow must go "somewhere". You can not just restrict it like is commonly done with a centrifugal pump. In other words, the by-pass style of control should be used with your roller pump.
It is rather confusing to follow the product flow in your system just from those pictures. I suggest consulting some plumbing diagrams that show the differences between inline and bypass control as well as plumbing arrangements for agitation. Many folks confuse agitation with by-pass control. They are separate items.
My advice is to change your style of pump or change your plumbing arrangement. If you replumb the control valve to allow the excess to return to the tank (by-pass control) you will need to change the control configuration in your Insight configuration to reflect the change. Then put the Insight into the Manual mode and use the UP and DOWN arrow keys to see if the rate in Manual agrees with what you would expect. If it is "backwards" where pushing the UP arrow key reduces the amount getting to the ground, you have made the wrong choice in the configuration. The system must work correctly in that respect in Manua or work properly in Rate 1 or Rate 2.
Really using a boomless nozzle is rather a shotgun approach and the applied rate is just a ballpark figure anyway.
Edited by tedbear 5/15/2024 12:24
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AL Insight with boomless nozzel
