Industrial Water Softener

The second variable in the design process is figuring out the daily demand on the system. This is calculated in gallons per minute (GPM), gallons per day (GPD), and the influent water quality. The vessel size, pipe size, and control valve sizes are all dictated by the daily demand. A good rule of thumb is that each vessel does not regenerate more than once per day. The bed velocities need to be at an acceptable rate to minimize pressure loss and increase bed longevity. Bed velocities can range from being extremely conservative to extremely aggressive. Most designs call for bed velocities of 8 to 12 gallons per minute per square foot of bed surface area.