DN50-800

PN10-100

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 motions of both the sealing face to its due position due podition and the tapered block to wedge-up are separated to have ?zero leadage come true.

2. The sealing face is of a small frictional force lf motion,lightly opened and closed and has a self copensation 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 eletric-operation. The valve can be used as the open & close ?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 vacuum isolating sealing for the system of eteam turbine's condesation and vacuum negative pressure in steam power plants.

Valve Ctrucure Type

Model NKZ44 and NKZ64 Vacuum isolating gate valves.

Manufacture and Acceptance Standard

1. Manufacture,ecceptance and technical conditions per ?GB/T12234,GB/T12235.

2. Face-to face dimensions per GB/T12221.

3. Flange sizes per JB/T78-79,GB/T9112-9124.