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High-performance seals for butterfly valves

Published:  01 March, 2021

In order to ensure that process plants meet hygiene requirements, industry-specific approvals and resistance to CIP/SIP media, FREUDENBERG SEALING TECHNOLOGIES has developed a new series of high-performance seals for butterfly valves. The company says the seals have been developed in conjunction with French customer Definox, one of the leading manufacturers of first class process valves and stainless steel equipment for high-end applications in sectors such as food, beverage, cosmetics, pharmaceutical and animal feed.

Freudenberg says following rigorous tests, 70 EPDM 291 O-rings have already been delivered to Definox, where they have been successfully deployed and demonstrated and based on this first success, both companies decided to launch a project for the development of new butterfly seals.

Developing the new seals saw the two companies draw up a list of technical targets, which included simple installation, uncompromising tightness, wear-resistant materials and sealing geometry free of dead space. With the concept finalised, the development team at Freudenberg Sealing Technologies set to work.

As part of an initial phase, Freudenberg performed extensive validation testing of the new valve seal on its in-house test bench. Seals in three reference dimensions were tested in Definox butterfly valves under operating conditions similar to reality. Results from the long-term tests could then be transferred to other seal dimensions.

The co-operative partnership between Freudenberg Sealing Technologies and Definox resulted in an advanced butterfly valve seal offering both design innovation and high levels of wear resistance. This can make it ideal for process sector requirements.

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t: 01332 524422

e: fst-food-beverage@dichtomatik.co.uk

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