Diaphragm Materials
Wilden’s offering includes a number of material options that have been tested extensively over the years for use in AODD pump diaphragms. These materials can be grouped into three primary families: rubber, thermoplastic elastomer(TPE) and polytetrafluoroethylene (PTFE). These primary materials are available in a variety of designs – each offering unique benefits depending on the application and the characteristics of the product being pumped. Additionally, Wilden diaphragms are offered in a number of shapes, including traditional, contoured and convolute.
Rubber Elastomers
Wilden® uses various compounds that consist of natural rubber and man-made additives to increase the compounds’ resistance to specific types of fluids. Rubber diaphragms provide the greatest temperature spans as well as long flex life and are specifically engineered to significantly increase chemical resistance.
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Polytetrafluoroethylene Elastomers (PTFE)
Available in two-, reduced- and full-stroke configurations, Wilden® PTFE diaphragms are the ideal choice for aggressive chemical applications. PTFE diaphragms are also offered with several back-up diaphragm materials, including Neoprene, Buna-N, EPDM, Wil-Flex™ and Saniflex™.
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Thermoplastic Elastomers (TPE)
Wilden® TPE diaphragms are durable, low cost and operate over a wide temperature range. Injection-molded of premium grade engineering resins, TPE diaphragms have inherent tensile strength without the need for fabric reinforcement. TPE diaphragms are available in Wilden’s integral piston and EZ-Install diaphragm design as well as the traditional AODD diaphragm shape (pie-shape).
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