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A new full-stroke, integral piston diaphragm model

| By Chemical Engineering



This manufacturer of air-operated double-diaphragm (AODD) pumps has recently introduced its 76-mm (3-in.) size Full-Stroke Integral Piston Diaphragm (FSIPD). The new FSIPD (photo) is ideal for use in the company’s Saniflo FDA pumps, as well as its Original, Advanced and Advanced FIT series of AODD pumps. These 3-in. diaphragms are said to be well-suited for hygienic applications because they are constructed of food-grade Wil-Flex (Santoprene), and unlike conventional diaphragms, the integral piston is completely encapsulated within the TPE material, meaning there is no outer piston that can trap fluid and particles. The diaphragms withstand temperatures from –40 to 107°C, and meet the requirements of FDA CRF 21.177, EHEDG and 3A. — Wilden, part of PSG, a Dover Co., Grand Terrace, Calif.