Ametek was kind enough to send EPI calculators (listed below) for determining how large of a high-volume low pressure rotron blower is required for a metal finishing line/tank.
First, you complete the Application Data Sheet -ADS10. It asks for the following:
Voltage, phase, Hertz and motor enclosure
Next, it asks for tank dimensions, solution depth and what type of solution require the agitation
- What type of agitation mile, medium or rapid? For the E-Brite 30/30 rapid is best for plating at higher current densities.
- How many sparger lines / number of legs per tank?
- Distance from tank to blower?
- Pipe size
From the solution type you can determine the agitation factor (F) SCFM/ft2 and the specific gravity. For example, let’s say you want to create a 168-gallon tank of E-Brite 30/30 for heat treat stop off. Tank dimensions are 36”x36”x36” with 30” of solution depth. From the ADS-10 you will see the F = 1.0-1.5 SCFM/ft2. The specific gravity they factor in is 1.2.
1.) Determine pressure required in psig
P =(0.43)(D)(SG) + 0.75 D = solution depth in feet SG= specific gravity
Our tank P=(0.43)(2.5)(1.2) + 0.75 equals 2.04 psig
2) Determine the flow
Q ( SCFM) = (A)(F) A =surface are of tank in square feet F=agitation factor from ADS10
Q= (9)(1.5) note use 1.5 because we need rapid agitation