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Capacity control valve and mass flow controller for hot area and lamination die displacement component null for hot area
Capacity control valve and mass flow controller for hot area and lamination die displacement component null for hot area
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机译:热区的容量控制阀和质量流量控制器,热区的叠层模具位移组件为零
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摘要
PURPOSE:To ensure characteristics, e.g. a displacement amount, at given levels even when a working atmospheric air temperature is high, by forming a lamination type displacement element of an electro-mechanical converting material to indicate that a piezoelectric strain constant is a maximum value in a temperature region higher than an ordinary temperature. CONSTITUTION:In a flow rate control valve, a lamination type displacement element 21 is formed of an electro-mechanical converting material to indicate that a piezoelectric strain constant d33 is a maximum value in a temperature region higher than an ordinary temperature, and a diaphragm 17 is driven such that it can make contact with and separate away from a valve seat 15. A heating means is provided where occasion demands so that the lamination type displacement element 21 is actuated at temperature in the vicinity of a temperature region where the piezoelectric strain constant d33 indicates a maximum value. Since, even when organic metallic gas having a boiling point of 50 - 150 deg.C is an object, the piezoelectric strain constant d33 of a material of which the lamination type displacement element is formed holds an sufficiently high value, the stroke of a diaphragm is high and an enough flow rate can be provided.
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