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Zero Internal Volume Designs, Typical Valve Pumping Volumes
, often reducing the sensitivity of the instrument. In a conventional valve seat design, the protruding valve seat is hard and prevents the Teflon diaphragm from flattening against the valve body. In the zero internal volume system, a special soft inert elastomer (perfluoroelastomer) is used
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Understanding hardness
A better understanding of hardness lets designers match the best soft-touch elastomer to their application. A gellike 30 Shore 00 Versaflex TPE is engineered to serve as ultrasoft cushions in bicycle seats, shoes, and furniture as well as nontacky grips on personal care products and sports
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Aggressive pH Monitoring for Aggressive Chemical Processes
(Foxboro, Mass.), in its Foxboro 871PH Series sensors. Pastushaks team found that the Ryton probe withstood aggressive reagents and solvents. But there was still the O-ring issue. Invensys fashioned a ring made of Kalrez, a flexible elastomer, which did the trick. Each ring may cost
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Products & Services
The Roto-Tab valve has been designed to prevent it from breaking or damaging capsules or tablets during operation. The valve's rotating dome closes smoothly and gently, its manufacture says, slowing the flow of pills to a trickle. The device's elastomer seal then expands, using compressed air, gently
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Oil Or Grease, Natural Or Synthetic
. Digital Edition. eNewsletters. Advertisement. Community. Forums. Blogs. LinkedIN. Facebook. Events. View Upcoming Events. Advertisement. Related Content. Backing Layer Films. Elastomer Sealing Materials. Teflon Bearings Keep DNA Research Clean. Nonleaching Film Can Be Sealed With RF Welding
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Valve Terms & Acronyms Explained
material for high temperature/high purity applications. IAPD: International Association of Plastics Distributors. Formerly NAPD, National Assoc. etc. ISA: The Instrumentation Systems and Automation Society. Formerly Instrument Society of America. KALREZ: A fluorinated elastomer used for high
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MICRO:Product Technology News (March 2001)
, making it more cost-effective and efficient than traditional valve manifolds made of heavy metal or plastic. Tolerance problems and potential leak points are minimized by an elastomer base for screwless assembly and fewer functional parts. Compact Process Controller. Watlow Electric Manufacturing. St
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MICRO: Spotlight
efficiency. (S.F., Gateway, Booth 3310). High-purity seals. Parofluor Ultra FF354-65 from the Parker Hannifin Seal Group is a white perfluorinated elastomer with low-closure-force sealing capabilities and temperature resistance up to 600 F. The low 65-durometer sealing material is formulated to resist