Mixer Torque Pre-Sizing
Calculate the required torque from your tank, product and impeller data — the real process need, not the motor nameplate.
Every question can be answered by a plant engineer by looking or measuring with a tape. The result is a pre-sizing; final motor selection is confirmed by EMF engineering.
What is the purpose of mixing?
What is being mixed?
Pick the closest match. The calculation always uses the worst case (coldest, thickest).
If you have measured values, enter them (optional — narrows the result range):
Measured at the lowest operating temperature; if entered, it replaces the estimate from the product selection. Your quality/process lab usually has this value (a Brookfield reading is sufficient).
Are there solids in the product?
Where does the mixer shaft enter the tank?
Select the impeller type
Pick the drawing that looks most like your impeller.
Measure tip to tip. A 10 cm error changes the result significantly — measure, don’t guess.
Check the agitator manufacturer’s nameplate or drawing first — the diameter is usually stated there. If not available, tick this box: we estimate from the tank diameter using a typical ratio (the result range widens).
Tank dimensions
If you don’t know the height, enter the volume — we compute the height. (1 m³ ≈ 1 t for water-based products)
Operating conditions
Speed of the impeller shaft — from the gearbox output or the drive display. If unknown, leave empty and enter motor speed and gearbox ratio below; we compute it.
If you know your existing system (optional, for comparison)
We show the installed torque next to the calculated real need.
Pre-Sizing Result
Assumptions
Request a quote for this torque and speed
Leave your name, company and email: the torque and speed above are sent to our engineers together with your answers, and we will get back to you.