Partial Valve Position - Partial Valve Position is how far open the carrier valve is while adding products. The more open the carrier valve, the slower the product will flow, and the faster holdback will be reached.  The Minimum is 20 so there is some carrier flowing with product, unless holdback has been reached.

Minimum Holdback works by reserving carrier for rinsing and getting all the product to the destination. If you get a message of "Carrier May Run Out", the Mixmate will only run the products until all of them are complete, then finish with carrier.

Example 1:

You have 1000 gallons of carrier and 200 gallons of product getting mixed for a total Mix Size of 1200 gallons. The minimum holdback is 50 gallons. In this example the Mixmate would stop the carrier flow at 950 gallons if not all the products are complete.

Example 2:

You have 100 gallons of carrier and 20 gallons of product getting mixed for a total Mix Size of 120 gallons. The minimum holdback is 100 gallons. In this example the Mixmate would not run any carrier until all the products are complete.