fast control valve duration 快控气门持续时闽
duration of valve opening 开阀时间
valve opening duration 气门开启持续时间
Input signal of controller is solenoid valve lift. Control parameters are valve opening timing and valve open duration.
控制器的输入信号为电磁阀升程，控制量是气门开启定时和开启持续时间。
The external surface of the directly built-in valve is corrosion resisting treated with epoxy coal bitumen and can be the same duration as the pipeline.
直理式阀门外表面采用环氧煤沥青防腐处理，能与管线同寿命。
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