Acorn Engineering

Master Mixing Valve Sizing Guide

Master Mixing Valve Sizing Guide

Welcome to the Master Mixing Calculator. We built this tool so that you could size and select the correct Acorn MV17 Master Mixing Thermostatic Valve based on the characteristics of your project.

3 Easy Steps

Project Info

Fixtures & GPM

Valve Results

Step 1 of 3: Enter all of your project details. On the next step you will enter all of your fixtures.

Project Information

We do not store any of this information. These fields are used for your convenience and included in the printed version available in Step 3

Preparer Information

We do not store any of this information. These fields are used for your convenience and included in the printed version available in Step 3

Temperatures

Must be 100-160
Must be 32-80
Must be 32-160

Inlet Pressure and Distances

Must be 0-125
If Master Mixing is above the fixtures, enter a negative number for vertical rise
Must be 0-1000
Must be 0-100. If you do not enter a usage factor, a default value of 80% will be used to calculate Actual Demand results if applicable.
Must be 0-12

Pressure Difference

Based on 0.43 PSI/Vertical ft plus 0.01 PSI/Horizontal ft loss
10 PSID is reserved for farthest/highest fixture
Enter the PSID you'd like to use for valve selection.
Warning! A PSID much lower than the recommended PSID will result in an oversized valve and unnecessary higher cost.