Aseptic Valves Adjuster Stops Diaphragm Damage

| Editor: Dr. Jörg Kempf

The Gemü 602 stainless steel aseptic diaphragm valve is now available with a manually-operated seal adjuster to prevent damage to the diaphragm caused by over-tightening.

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Excessive closing forces in diaphragm valves lead to over-compression of the diaphragm and hence reduced service life. In the case of manual valves, those of small diameter are usually the worst affected, Gemü says. The seal adjuster is a mechanical limit stop which allows the user to compress the diaphragm enough to create a reliable seal, but not enough to cause damage to the elastomer material. Seal adjusters can also be used to set a minimum flow through the valve. The Gemü 602 valve is available in sizes DN 4–15, with a choice of butt-weld spigots, clamps, and threaded connections. Operating pressures are up to 10 bar for EPDM diaphragms and 6 bar for PTFE diaphragms. The stainless steel handwheel and bonnet are designed for easy cleaning, and the valves are CIP/SIP capable and autoclavable.