The PTFE Disc Filter utilizes replaceable Zitex™ filter elements which form a continuous mat of PTFE Fibers. These fibers are fused together to form a screen like membrane structure. The resultant membrane is hydrophobic, hence aqueous suspensions must be filtered at high rates to overcome surface tension. Because of the non-stick characteristics of PTFE, the natural lubricity of all wetted surfaces, and the easy replacement of filter elements, entrapped contaminates may be easily removed. 47 mm Zitex filter elements are available in Ultra Fine, Fine, Medium or Coarse.