How to Select a Static Mixer
Static Mixers are easily sized using available formulas and pressure drop charts. Your initial selection can be made by following the guidelines listed below. To fine tune your selection contact our application engineering staff.
(1) Determine the mixer type using the Motionless Table:
Type of Flow  # of LPD  # of ISG Elements 















*Viscosity Ratio = µp/µm
(viscosity of primary stream p / viscosity of minor stream m)
(2) Assume a mixer diameter
(3) Estimate Pressure Drop
1.  Compute the Reynolds Number:
NRe = Reynolds number dimensionless 

2. 
If NRe < 500 the flow is laminar. Use either Fig.1 for LPD or Fig.3 for ISG mixers to estimate the pressure drop per element. If NRe > 500, the flow is turbulent. The pressure drop per element is estimated from Fig.2 for LPD or Fig.4 for ISG mixers. 

3.  Multipy the pressure drop per element by the total number of elements to obtain the estimated pressure drop through the mixer. 

4. 
The estimated pressure drop must be corrected for physical properties as follows:


5.  To determine LLPD pressure drop, multiply LPD pressure drop by 0.46 (if turbulent). In laminar flow, the LPD and LLPD have similar pressure drop. 

6. 
If actual pressure drop exceeds the allowable value, repeat above steps using a larger mixer diameter. 