Enquire Now! Contact Us ISO9001 Certified Twitter Facebook LinkedIn Youtube Email How to Specify a Static Mixer How to Specify a Static Mixer – Static Mixer Design Calculation Step 1 – Components to be Mixed List the range of flow rates and physical properties (density* and viscosity*) of each component to be mixed. A Static Mixer Sizing Questionnaire is available for your convenience to help you with your static mixer design calculation. Operating temperature and pressure are also required, or state ‘ambient’. * if similar to water state ‘as water’. Step 2 – Mixture Quality It’s difficult to imagine buying a pump without specifying the pressure requirements. But that’s exactly what happens so many times with motionless mixers if the mixture quality is not specified. So why take a chance? For most turbulent applications, the mixture quality can be defined by the variation coefficient (CoV), where a value of 0.05 is usually considered to be completely homogenous. Many mixing applications are not time dependent – the required mixture quality, over the full range of flowrates, can be specified at either the mixer discharge or some clearly defined location further downstream. However, there are many dosing applications, in particular in water treatment, which require very short mixing times to ensure maximum effectiveness of the additive. It is therefore important to also specify the mixing time or distance downstream from the mixer, usually stated in pipe or channel hydraulic diameters, where the required mixture quality is to be achieved. Don’t use pressure drop for this purpose – it has nothing to do with mixture quality. Don’t use subjective descriptions e.g. efficiently mixed, thoroughly mixed, adequately mixed. Don’t use G factor – again, it has nothing to do with mixture quality. Do specify the variation coefficient to define mixture quality. Do specify the mixing time or location of the required variation coefficient. Step 3 – Mechanical Details Preferred pipe diameter and / or maximum allowable pressure drop. Materials of construction / design condition. Injector requirement. Flange type and rating. Special tests and documentation requirements. If in doubt, please contact Statiflo. Search Search Submit Latest News Statiflo Spreads Across Africa November 25, 2021 Statiflo Wins Award for Exporting Excellence November 3, 2021 Statiflo’s Team Find Successful Formula for CHEMUK 2021 September 27, 2021 Back on the Road! Statiflo are Heading to CHEMUK 21 July 15, 2021 Statiflo Makes Waves with New Scottish Water Deal July 7, 2021 Latest News Statiflo Spreads Across Africa November 25, 2021 Statiflo Wins Award for Exporting Excellence November 3, 2021 Statiflo’s Team Find Successful Formula for CHEMUK 2021 September 27, 2021 Back on the Road! Statiflo are Heading to CHEMUK 21 July 15, 2021 Statiflo Makes Waves with New Scottish Water Deal July 7, 2021 Contact Us Statiflo International +44 (0) 1625 433 100 enquiries@statiflogroup.com Statiflo Corporation +1 (413) 684 9911 enquiries@statiflogroup.com Statiflo GmbH +49 (0) 2261 913570 enquiries@statiflogroup.com Statiflo Inc. +1 (416) 756 2406 enquiries@statiflogroup.com Latest News Statiflo Spreads Across Africa Statiflo Wins Award for Exporting Excellence Statiflo’s Team Find Successful Formula for CHEMUK 2021 Social Tweets by Statiflo Copyright Statiflo Group - All Rights Reserved You can learn more about cookies at AboutCookies.org. If you wish to stop cookies, or find out more about how we use them, click here.