液氨氣動開關閥
簡稱：氨氣動開關閥，氣動緊急切斷閥，液氨緊急切斷閥，氣動氨開關閥
型號：QDQ421F-40C QDQ421F-40P
氣動液氨開關閥概述：
   液氨氣動開關閥 Liquid ammonia is special pneumatic switch valve也稱(cheng)液(ye)氨氣動(dong)截(jie)止閥(fa)(fa) Liquid ammonia valve，氣動(dong)緊急切(qie)斷閥(fa)(fa)，液(ye)氨緊急切(qie)斷閥(fa)(fa)。屬(shu)于氨庫(ku)切(qie)斷閥(fa)(fa) Ammonia cut-off valve系列氣動(dong)氨開關閥(fa)(fa) Pneumatic ammonia dedicated switch valve產品，采用直行程活塞氣動(dong)執行器(qi)與(yu)(yu)液(ye)氨截(jie)止閥(fa)(fa)構成，通過防爆電磁(ci)閥(fa)(fa)控制氣源壓力(li)輸入(ru)輸出對閥(fa)(fa)門執行開啟與(yu)(yu)關閉動(dong)作。

氣動開關閥性能特點：
1，工作壓力：1.6Mpa-4.0Mpa
2，工作溫度：-30～+80℃
3，驅動方式：氣動、氣動帶手動
4，連接方式：法蘭
5，制造標準：國標GB、JB、HG
6，頂部可安裝手動操作機構
7，配套附(fu)件：防(fang)爆電磁閥(fa)，空氣過濾減壓閥(fa)，信(xin)號(hao)反饋（行程(cheng)開關），≥+80℃熔斷裝置

  液氨氣(qi)(qi)動開(kai)關閥結構(gou)形式屬(shu)單作(zuo)用（常閉式）液氨氣(qi)(qi)動切斷閥 Liquid ammonia cut-off valve，氣(qi)(qi)動液氨截止閥 Pneumatic liquid ammonia valve種類(lei)，流體介質方向(xiang)高(gao)進(jin)低出，承壓位置在(zai)高(gao)處，介質從(cong)閥瓣上(shang)方向(xiang)下方輸出。軟(ruan)(ruan)材料密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)圈(quan)嵌入(ru)閥瓣或用壓圈(quan)固定在(zai)閥瓣上(shang)。由于(yu)軟(ruan)(ruan)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)截止閥很容易(yi)實現密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)效果，保證泄(xie)漏(lou)量為(wei)零，一旦處于(yu)開(kai)啟狀態，閥座(zuo)和閥瓣密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)面(mian)之間就不(bu)再有接觸，介質不(bu)會對密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)面(mian)產生沖(chong)刷，密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)面(mian)的磨損很小。此(ci)結構(gou)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)件由閥瓣、軟(ruan)(ruan)材料密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)環(huan)(huan)(huan)、閥體金(jin)屬(shu)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)面(mian)組成，密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)環(huan)(huan)(huan)通過(guo)壓環(huan)(huan)(huan)固定在(zai)閥體上(shang)。雙重密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)結構(gou)中金(jin)屬(shu)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)為(wei)軸向(xiang)主密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)，軟(ruan)(ruan)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)為(wei)徑(jing)向(xiang)副密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)，當金(jin)屬(shu)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)面(mian)出現泄(xie)漏(lou)時，泄(xie)漏(lou)的介質可被(bei)軟(ruan)(ruan)材料密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)環(huan)(huan)(huan)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)，此(ci)軟(ruan)(ruan)材料密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)環(huan)(huan)(huan)徑(jing)向(xiang)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)結構(gou)可*避免軸向(xiang)軟(ruan)(ruan)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)圈(quan)易(yi)被(bei)壓壞的缺陷。