Start with filling time
With consistent units, theoretical filling time equals target fill mass divided by product mass flow. This is a starting point, not a finished capacity rating. Account for the final filling phase, valve response and any settling needed by the measurement procedure. The proposed flow must be available at the filler inlet for the actual product.
Add the steps that occupy the station
Include bag presentation, fitment connection, interface treatment, closure and container removal. With one position, non-overlapping tasks add to the cycle. With two positions, establish which tasks truly overlap and which remain shared. Compare package rate using the complete tested sequence rather than a product-flow figure alone.
Turn the cycle into a daily target
Available production time excludes cleaning, pre-sterilization, changeover and planned stops. Record required packages or mass per shift and the operating window. Ask suppliers to state the product and package behind their proposed rate, the assumptions about staffing and handling, and the acceptance test that will verify it.
PRACTICAL ANSWERS
Frequently asked questions
Can I convert litres per hour directly to bags per hour?
Only after stating the actual fill volume, product density where needed and the full package cycle. Handling and closing can limit the finished-package rate.
Should cleaning time be included?
Yes, when discussing shift or daily output. Keep instantaneous filling rate distinct from available production time.
How do I compare two capacity proposals?
Give both suppliers the same product, package, target fill, operator and handling assumptions, then request a cycle breakdown and a representative trial.