How to properly mix a coolant?
The ratio or concentration for each operation is different. Consult with your Tower Sales Engineer on the target ratio. Once this is established, use the "O.I.L." method. " Oil in Last" This applies to soluble oils, semi-synthetics, and synthetic water extendable products.
For example - if your target ratio is 9:1 or 10%, add 9 parts of water to your container. Then begin to add one part lubricant concentrate with agitation to get proper mixing.
Using a refractometer, get a reading from the mixed solution. Every product has a different factor to determine the correct refractometer reading.
The formula for this calculation is: Refractometer Reading (RI) = Concentration % / Factor.
For Tower's Saf-T-Cool 458, the Factor is 2.2. So for a 9:1 or 10% solution, the Refractometer Reading is:
10% / 2.2 = 4.5
If your reading is higher, then you have too much coolant concentrate in your container. If your reading is lower, then you have too much water.
There are a number of mechanical ways to properly mix coolants as well. Please give us a call, and we will have one of our trained Application Engineers contact you to determine which method is best for your operations.
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