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Wilden Patents Full-Stroke Integral Piston Diaphragm

Contributed by: PumpScout Staff

Wilden is a leading manufacturer of air-operated double-diaphragm (AODD) pump technology. Recently, the global company announced that its Full Stroke Integral Piston Diaphragm (FSIPD) for AODD pumps in the hygienic industry has received Patent No. 8,496,451 from the United States Patent and Trademark Office.

“This patent identifies Wilden as a global leader of AODD pumps in the hygienic industry,” says Robert Jack, Development Engineer at Wilden Pump and Engineering. “The FSIPD provides the clean-ability that customers need and adds the flow rate and suction-lift performance they want. In addition, customers will be happy to know that a Wilden FSIPD is about half the cost of a PTFE IPD.”

The patented FSIPDs are constructed of Wil-FlexTM (Santoprene®) and incorporate a metallic plate in the material itself rather than an outer addition. This negates the need to clean the pump manually and also results in a maximum performance diaphragm design that uses the same shaft and inner piston as Wilden’s rubber and TPE diaphragms. Wil-Flex FSIPDs do not require inverting of the diaphragm for installation and do not use any adhesives. These user-friendly features combined with an efficient and inexpensive design makes Wilden’s FSPIDs a good alternative to PTFE IPDs.

Wilden offers its FSPIDs for use in 25 mm (1”), 38 mm (1-1/2”), 51 mm (2”) and 76 mm (3”) HygienicTM Series pumps. These diaphragms are also compatible with standard Wilden 25 mm (1”), 38 mm (1-1/2”) and 51 mm (2”) pumps, including the FDA-compliant SanifloTM Series.

Wil-Flex FSPIDs comply with FDA regulations and meet FDA CFR 21.177, EHEDG and 3A requirements. They also offer flow, suction lift and efficiency comparable to rubber and TPE diaphragms with clean-in-place (CIP) capabilities


Source: PSG Dover