主要结构特点及用途
1、   本系列阀门主体采用铸锻结构，具有平行双密封副半强制双向密封，密封面到位运动和楔形块楔紧运动分步作用实现零泄漏。
2、   密封面运动摩擦力小、启闭轻便，而且密封面磨损有自动补偿功能。
3、   结构简单、紧凑、检修方便，适用寿命长。
4、   阀盖填料室设有真空密封结构，具有自胀压紧作用，平且密封采用高强膨胀材料密封，使系统与大气完全隔离，具有很好的系统气密性。
5、   本系列阀门连接形式分法兰、焊接两种，驱动方式有手动，电动两种。
该阀门适用于工作温度＜425℃和＜550℃，工作介质为水、蒸汽货空气的管路上，作为启闭装置；尤其适用于火电厂汽机冷凝和真空负压系统。起真空隔离密封作用 Chief structure features and usages

1. The main body of this series valve uses a casting and forging structure and has a dual-direction seal of parallel secondary semi-forced dual-sealing and the motion of both the sealing face to its due position due podition and the tapered block to wedge up are separated to haze zero leadage come true.
2. The sealing face is of a small frictional force if motion, lightly opened and closed and has a self compensation function for wearing.
3. Simple and compact structure easy to more than 10 years of long duration.
4. A vacuum sealing structure is set in the filling chamber on the valve cover, which has the action of self-expanding and impacting, the joint faces are sealing with the ecpansive material of high strength to completely isolate the system from air,
5. Two comectin gways of b flange and welding, two ways to drive of heand-and electric-operation.

The valve can be used as the open＆close device for the pipelines under the working temperature＜425and＜550℃and the working medium of water, steam or air; especially suitable to act as the vacuum isolating sealing for the system of eteam turbine’s condensation and vacuum negative pressure in steam power plants.
阀门结构形式Valve ctrucure type
NKJ61型真空隔离截止阀；NKZ44、NKZ64型真空隔离闸板阀 Model NHJ61 Vacuum isolating stop valve; NKZ44andNKZ64 Vacuum isolation gate valves.

NKJ61型阀门主要性能规范 Chief property and specification

主要零件材料 Material for main parts

    主要尺寸及重量 Main dimension and weight 

注：PN4.0(40)阀门允许作为PN1.0(10)、PN1.6(16)、PN2.5(25)压力级选用。 Note: Valve of type PN2.5MPa(25)Applicable、PN1.0MPa(10)、PN1.6MPa(16).