快速切断阀是自动化系统中执行机构的一种，由多弹簧气动薄膜执行机构或浮动式活塞执行机构与调节阀组成，接收调节仪表的信号，控制工艺管道内流体的切断、接通或切换。具有结构简单，反应灵敏，动作可靠等特点。被广泛应用于煤气、天然气及液化石油气等可燃气体。
... 快速切断 quick shut-down 快速切断阀 rapid cut-off valve 快速松脱接头 quick release joint ...
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试验结果表明阻爆控制器能配合快速切断阀可有效阻止瓦斯爆炸传播。
The test results showed that the explosion resistant controller could rapidly assist the shut-off valve to effectively prevent the gas explosion spreading.
通过推导公式计算快速切断阀的允许切断时间，并总结燃气锅炉供气系统中快速切断阀的选择方法。
The allowable shut-off time of fast shut-off valve is calculated by inferred formula and selection way of fast shut-off valve in the gas supply system of gas burning boiler is summarised.
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