Chemical Metering-Pump Setting
Neat chemical (lb/day), solution feed (GPD and mL/min), and pump setting (% of max) from plant flow, target dose.
Example
You enter
- Plant flow (MGD) 0.5
- Target dose (mg/L) 8
- Solution strength (% active) 12.5
- Solution specific gravity 1.16
- Pump max output (GPD) 50
You get
- Pump setting 55.2
- Solution feed 27.59
Details, formula, and sources
Solution strength, and specific gravity via the pounds formula.
pure lb/day = MGD*dose*8.34; solution lb/day = pure/(strength/100); GPD = solution_lb_day/(8.34*SG); mL/min = GPD*3785.41/1440; setting% = GPD/pump_max*100.
Pounds-formula basis (lb/day = MGD x mg/L x 8.34), standard AWWA / EPA water-operator practice, by name.
Public pounds formula; the operator of record and primacy agency govern.
Estimate. AHJ and licensed professional govern.
Field names used by the API: flow_mgd, dose_mgl, strength_pct, sg, pump_max_gpd, setting_pct, solution_gpd
- 8.34 lb/gal weight of one gallon of waterpounds formula