工業的な真空度自動制御

概要

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The operating pressure of almost all vacuum equipment should be kept as lowest as possible, so the pressure control usually has not to be done. In some cases, i. e. vacuum fractionating distillation, the pressure should be kept as constant as the operators demand. There are many reports and ideas of such controlling methods, but they are almostly limited to be applied to the laboratory scales.<BR>The auther applied the conventional pressure-difference tranceducer (D. P. cell, Foxboro Instrumentation Co., Mass., U.S.A.) as the vacuum sensing unit. Except specially made control valve (Fig. 7), all other components, i. e. indicator, recorder, controller and diaphragm motor are also commercially available.<BR>By this system (Fig. 3), the author successed to maintain the pressure reliably and completely in an industrial scale equipment as indicated in Fig. 6.
日本真空協会の論文