真空隔离截止阀主要结构特点及用途

1、本真空隔离截止阀系列阀门主体采用铸锻结构，真空隔离截止阀具有平行双密封副半强制双向密封，
2、密封面到位运动和楔形块楔紧运动分步作用实现零泄漏。密封面运动磨擦力小、启闭轻便，而且密封面磨损有自动补偿功能。 
3、真空隔离截止阀结构简单、紧凑、检修方便，使用寿命长。 
4、阀盖填料室设有真空密封结构，具有自胀压紧作用，并且各接各面采用高强膨胀材料密封，便系统与大气*隔离，具有很好的系统气密性。 
5、本真空隔离截止阀门连接形式分法兰、焊接两种，驱动方式有手动、该阀门适用于工作温度≤425℃和≤550℃，工作介质为水、凝和真空负压系统，起真空隔离密封作用。电动两种。蒸汽或空气的管路上，作为启闭装置：尤其适用于火电电厂汽机冷

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．

阀门结构型式 Valve ctrucure type

NKJ61型真空隔离截止阀；NKZ44、NKZ64型真空隔离闸板阀 
Model NKJ61 Vacuum isolating stop valve：ModeiNKZ44 and NKZ64 Vacuum isolating gate valves