What this tool does
Makes measured drag-out visible before rinse-flow or recovery changes are evaluated.
When to use it
Use after a safe, representative drain-time study for one rack, barrel or product family.
Inputs and supported units
Each labelled field explains the quantity it expects. Unit-system changes convert existing numeric entries once and keep calculations on a single SI internal basis. Supported shared units include L/min and GPM, metres and feet, kPa and psi, millimetres and inches, kW and hp, and °C and °F as relevant.
Calculation or decision method
Active mass = drag-out × bath concentration
How to interpret the result
Read the primary result with the supporting breakdown and warning. A plausible number is not evidence that every input, operating case or design constraint has been included.
Worked example
40 mL/load at 25 loads/h is 1 L/h; at 100 g/L across eight hours it carries 0.8 kg/shift.
Assumptions
Representative production, matched meter and load boundaries, user-entered process targets and tariffs, and stable conditions during each comparison.
Limitations
No bath chemistry, final rinse acceptance, discharge limit, treatment package, permit condition or worker exposure control is selected or approved.
Sources
- U.S. EPA — Pollution Prevention for Metal Finishing
- U.S. EPA — Metal Finishing Development Document
- U.S. EPA — Metal Products and Machinery Development Document
- U.S. EPA — Conductivity Control for Rinse Water