The simplest question asked and, ironically, the most difficult to answer. All processes are different, not only in terms of contaminant, but also in terms of flow rates, concentration, physical format and temperature – there are so many variables that each case must be considered individually.
Yes, the material can be pleated and moulded. It may require different settings or support to materials you have used in the past, but, wherever possible, we are happy to help optimise a material for your application and construction methods.
We use different carbons for different applications. Some call for the use of generic coal based carbons, others for higher activity coconut shell, and some applications require extremely specialised or impregnated carbons. In general, the products we supply contain high quality, high surface area carbons.
The limits of operating temperature depend upon the environment under consideration; however, the components in our filter media will withstand well over 100°C (212F). It should be remembered, however, that adsorption is an exothermic process, so increased temperatures will favour desorption.
Early indications are that some of our grades of material will ultrasonically weld and some will not. As our knowledge grows we will happily include this information on our product data sheets.
The only test conducted thus far has been with ethylene oxide sterilization, and the results indicate that the activity of filters containing activated carbon is not significantly affected.
Whether your filtration requirements can be solved using a standard grade or require a special development material, we are always happy to work with our clients to develop and evaluate new products.
Rema Filtration is committed to use, wherever possible, materials from sustainable sources; cellulose is, of course, such a material. It is however appreciated that not every situation can be addressed with such materials and we do use other base materials when the use of cellulose is impractical.
Other options include polymers, such as polyester and polypropylene or cellulose derivatives, in a variety of knitted, woven or non-woven formats.
We do not have a minimum run size or batch size per se; however, a batch size may be imposed upon us where such limits exist for a raw material. Where raw materials are customer supplied we are happy to work with very small amounts to enable you to evaluate a concept or work with very valuable components.
Whilst activated carbon is not the best adsorbent to use in any one situation, as a generic adsorbent that will work in almost every case, it is by far the most useful and cost effective.
We work with the full range of active components and impregnants, including zeolites, refractory oxides, clays, filter aids, silica gel and clients’ proprietary blends. These can be incorporated to best satisfy your requirements.
If our FAQs have not answered your question, please feel free to ask us