真空隔離截止閥主要結(jié)構(gòu)特點及用途

1、本真空隔離截止閥系列閥門主體采用鑄鍛結(jié)構(gòu)，真空隔離截止閥具有平行雙密封副半強制雙向密封，
2、密封面到位運動和楔形塊楔緊運動分步作用實現(xiàn)零泄漏。密封面運動磨擦力小、啟閉輕便，而且密封面磨損有自動補償功能。 
3、真空隔離截止閥結(jié)構(gòu)簡單、緊湊、檢修方便，使用壽命長。 
4、閥蓋填料室設(shè)有真空密封結(jié)構(gòu)，具有自脹壓緊作用，并且各接各面采用高強膨脹材料密封，便系統(tǒng)與大氣*隔離，具有很好的系統(tǒng)氣密性。 
5、本真空隔離截止閥門連接形式分法蘭、焊接兩種，驅(qū)動方式有手動、該閥門適用于工作溫度≤425℃和≤550℃，工作介質(zhì)為水、凝和真空負(fù)壓系統(tǒng)，起真空隔離密封作用。電動兩種。蒸汽或空氣的管路上，作為啟閉裝置：尤其適用于火電電廠汽機冷

Chief structure features and usages 
1．The main body of this series valve uses a casting and forging structure and has a duai-direction seal of parallelsecondary semi-forced dual—sealing and the motions of both the sealing face tO its due position due pidition and the tapered block to wedge up are sepa rated to have zero leadage come true． 
2．The sealing face is of a small frictjonal force if motion，lightly opened and closed and has a self copensation function for wea ring． 
3．Simple and compact structure easy to more than 10 years of long duration． 
4． A vacuum sealing structureis set in the filling chamber on the valve cover， which has the action of self-expanding and impacting，the joint faces are seal ing with the ecpansive material of high strength to compley isolate the system from air． 
5．Two comectin gways of b flange and wefding．two ways to drive of heand-and eletric-ope ration． The valve can be used as the open&cloe device for the pipelines under the working temperature≤425℃and≤550℃ and the working medium of water， steam or air：especially suitable to act as the vacuumisol ating sealing for the system of eteam turbine’s eondesation and vacuum negative pressure in steam power plants．

閥門結(jié)構(gòu)型式 Valve ctrucure type

NKJ61型真空隔離截止閥；NKZ44、NKZ64型真空隔離閘板閥 
Model NKJ61 Vacuum isolating stop valve：ModeiNKZ44 and NKZ64 Vacuum isolating gate valves