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Higher Efficiencies Using PTFE Filters With its unique physical properties, Cleanmake Products  filters with PTFE membrane are able to out perform nearly all other filter constructions in many applications. Among its many useful properties, PTFE is hydrophobic (Literally “afraid of water”) meaning it repels water. Additionally, it has a very low coefficient of friction of 0.05 – 0.10 (meaning substances have a hard time sticking to it and are easily removed) and has a high melting point of approximately 325°C. Stricter governmental regulations for particulate emission are on the horizon. The new EPA PM2.5 standard for particulate matter emissions will present additional challenges for facilities to reach compliance. Be ready to meet the challenge by employing high efficiency PTFE filter bags in your Cleanmake Products . PTFE filter bags from Cleanmake Products .com can reach amazing efficiencies when operated deployed correctly. PTFE filters from Cleanmake Products .com can easily reach sub-micron filtration ranges. In some applications efficiencies are high enough to allow for the recirculation of treated air back into the facility. Use of such “Green Technology” further promotes an environmentally friendly operation, and saves on heating costs. Efficiency Claims Confirmed By EPA TestingIndependent testing conducted under the EPA’s Environmental Technology Verification (ETV) program has proven that PTFE Membrane filters are capable of ultra high efficiencies. Tests of PTFE filter bags from several different manufacturers showed particulate matter outlet emissions as low as 0.0006 gr/ACF (1.3mg/m3). In most size ranges the test PTFE fabrics showed zero emissions during testing. Emissions data were below the detection limits of the testing equipment. The fractional efficiency percentages were 100%, only dipping to 99.98% with particle sized 0.3-0.5 (μM).**For more information please see EPA’s site for the Environmental Technology Verification (ETV) program at http://www.epa.gov/nrmrl/std/etv/center-apc.htmlThe Benefits of Surface Filtration Over Depth Filtration PTFE membrane filters also have a distinct advantage over non-membrane filters due to differences in the way they filter out particulate. Non-PTFE membrane filter bags employ depth filtration to filter particulate. Depth filtration is accomplished when a layer of dustcake forms on the outside of the filter, and an accumulation of dust particles is deposited in the depth of the filter. In coming particles are captured as they follow the tortuous path through the dustcake, and depth of the filter. As time goes on, more and more particles get trapped within the filter, leading to higher pressure drops and eventually filter “blinding” which reduces filter life. Cleanmake Products  filters with a PTFE membrane however employ surface filtration to remove incoming particles. The PTFE membrane works as the primary filter cake, collecting all of the particulate on the surface. This keeps the particulate from penetrating the filter fabric, which can lead to reduced airflow, and filter “blinding”. Additionally, with traditional filters larger than normal emission occur during start-up and immediately following the cleaning cycle due to lack of primary dustcake. With PTFE filters, this problem is largely eliminated. PTFE Fabric CombinationsPTFE membrane can be applied to a large variety of fabric substrates depending on the particular application. Contact a Cleanmake Products .com representative to help you to determine which combination of fabric and PTFE membrane is the best fit your particular process environment.  Below is listing of several popular PTFE / Fabric combinations