Filtration modules

06/01/1997

Filtration modules

U.S. Filter Corp. has announced that its Membralox ceramic membrane filtration modules are now available with PVDF (polyvinylidine fluoride) plastic housings. All wetted surfaces are made of either plastic or ceramic materials, ensuring that the fluid to be filtered does not come in contact with metals that could leach into the water. Used in semiconductor manufacturing, the new ceramic membrane filters offer several advantages over polymeric ultrafilters: higher particle retention; operation at high temperatures; compatibility with ozone, caustic, acid, or peroxide sanitizing agents; and the abilty to be steam-sterilized. Although the PVDF housing holds the same Membralox ceramic membrane elements as the stainless steel housings, special PTFE gaskets are used on each ceramic element and the housing and plates that seal the ceramic elements into the housing use George-Fischer-type connection flanges lined with a special low-permeability plastic. U.S. Filter Corp., Palm Desert, CA; ph 619/341-8117.