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Clippard Instrument Laboratory, Cincinnati, has a new CD that gives detailed information about its line of EVP proportional control valves, which can control flow ranging from 0 to greater than 20 liters per minute. EVP valves provide control of air or gas flow, vary output flow based on the current input to the solenoid, and can be controlled using DC current, open- or closed-loop control, and pulse width modulation. Information: 513-521-4261.
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