不銹鋼旋啟式止回閥外形圖：

不銹鋼旋啟式止回閥概述：

     不銹鋼旋啟式止回閥又稱單向閥或逆止閥，其作用是防止管路中的介質倒流。水泵吸水關的底閥也屬于止回閥類。啟閉件靠介質流動和力量自行開啟或關閉，以防止介質倒流的閥門叫止回閥。止回閥屬于自動閥類，主要用于介質單向流動的管道上，只允許介質向一個方向流動，以防止發生事故。止回閥按結構劃分，可分為升降式止回閥、旋啟式止回閥和蝶式止回閥三種。升降式止回閥可分為立式和臥式兩種。旋啟式止回閥分為單瓣式、雙瓣式和多瓣式三種。蝶式止回閥為直通式、以上幾種止回閥在連接形式上可分為螺紋連接、法蘭連接和焊接三種。

不銹鋼旋啟式止回閥技術規范:

1  適用介質：水、油品、蒸汽。

2  適合溫度：≤425℃。

3  閥門試驗壓力及閥門在各級溫度下的zui大工作壓力。

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