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Many kinds of nozzle-flapper type pneumatic pressure control proportional valves are in use. This paper describes the results of experiments and theoretical analyses regarding the characteristics of the valve pneumatic circuit. It was found that the characteristics of the output pressure versus the nozzle flapper clearance has a switching point as a relay. As it has a direct relation with valve linearity, this phenomenon has been studied experimentally and theoretically for various valve parameters. A way for choosing the optimum nozzle-flapper clearance is suggested from the results presented in this paper.

yuatsu to kūkiatsu/yuatsu to kukiatsu

Characteristics of a Force-balance Nozzle-flapper Type Pneumatic Pressure Control Proportional Valve. Part 1. Output Pressure versus Nozzle-Flapper Clearance Characteristics.