| Tech Tip For Aqueous Coating: Gun Calibratin |
Gun calibration is important for top quality coated tablets. After the gun geometry check and before gun boom
installation into the coating pan, a gun check should be performed to determine if all the guns are spraying the same
amount of solution per minute. Ideally one would place a graduated cylinder beneath each of the guns to be tested and
then run either a one or two minute spraying cycle to determine if the guns are spraying at the same rate. Keep the
atomizing air off while doing this. The guns should not vary by more that +/- 10 ml/min. Any variation greater than this
requires a gun adjustment.
You can fine tune the gun by turning the bolt or the spin dial at the rear of the gun. This adjusts the needle thrust and
allows either more or less solution through the nozzle. Try altering this setting until you have all the guns spraying within
the tolerances outlined above.
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| Solid Dosage Training, Inc. FREE TECHNICAL HELP Coating |
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