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    1. Archive

    Valves for bioanalysis

    May 9, 2002
    The next generation of bioanalytical instruments designed to explore and exploit the human genome will have to be reliable and economical, not just be made of inert materials.

    That's because they will have to sample and catalog millions of chemical combinations. To meet this need, engineers at Parker Hannifin's General Valve Operation, Fairfield, N.J., have designed the Oligo Series of valves. A newly designed perfluoroelastomer diaphragm gives the valves a life of over 10 million cycles (dry cycle testing). The low-coefficient-of-friction diaphragm and PEEK valve body make the valves compatible with the most demanding bioanalytical chemistries.

    The isolation solenoid valves use a standard two-way, normally closed configuration powered by 24 Vdc. Fluids flow through a 0.060-in. orifice, with 1Z4-28 inlet and outlet ports. The valves work with gases and liquids, and operating pressures range from vacuum to 20 psi; operating temperatures range from 40 to 150F. They have low internal volumes, less than 65 ml when energized, and response times ranging from 8 to 15 msec.

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