Getting expert help to solve filtration challenges, whether developing a new filtration process, or evaluating ways to make an existing process more cost-effective, means relying on outside help to provide actionable data.
For both new processes and process improvements, there are several pieces of information needed to support system design decisions. Of course, the chemical characteristics of the fluid to be filtered determine the types of materials that are appropriate. Operating parameters such as flow rate, temperature, and system pressure will help determine the number of filters needed.
Critical Process Filtration can perform a variety of tests to help develop data you can use to support your system design decisions.
Choosing the right materials is critical. The polypropylene cage, core and support materials of our cartridge and capsule filters have broad chemical compatibility, but should be evaluated with harsh solvents and some other chemicals. The range of materials used in our filter media and membranes can be found in the numerous data sheets for our products. There should be at least one option compatible with your fluid. If you want us to test compatibility, request a test by filling out the information on a our request form.
Fluid Particle Load and Filtration Goals
The combination of the particle load of the fluid and your filtration goals (as discussed in our previous blog post) will also determine the media and pore size for your filter(s). If you do not know, or are not sure of the number and sizes of particles in your fluid, our Technical Support Team can perform a particle size analysis and recommend filters based on your filtration goals. You can also request that test using our request form.
Filter Performance Testing and Scale-Up
In most cases, knowing the chemical characteristics of the fluid, the number and sizes of particles, and the operating parameters of the system will lead our Technical Support Team to recommend filter options that are likely to deliver the results wanted. However, choosing the filters that actually create the fluid that meets your filtration goals requires more data. A critical part of any test program is passing the actual fluid through each filter train option proposed and then testing the filtrate to determine which option delivered the best results.
In most cases, passing a small amount of fluid through laboratory scale disc filters (using a setup similar to that in the graphic) or small capsule filters will provide the assurance that a filter train will work as desired. Some operators prefer to test full size filters in a stream of fluid diverted to the test filter(s) for testing. This is sometimes called pilot scale testing. The most costly, and highest risk test method is to install a full system and test at full production scale. Testing at full scale is rare, though it may be done for some prefiltration applications where the risk to downstream processes or product quality is low.
Once the performance testing is complete, and the most cost-effective option chosen, the process moves on to system design or system modification.
In a later post, we'll discuss how the data developed is used for system design/modification and the implementation assistance available.
Other information and support are available. Go ahead and click the links below to visit some popular pages on our website.
- Visit our Technical pages to learn about filter options for several common filter applications
- Register to use our unique system sizing tools to help you determine the number of filters or sizes of capsules to use in your system
- See all of the Technical Support Services we offer- most of the time for FREE
- Learn more about our Custom System Design capabilities
We look forward to seeing you often!