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Vacuum isolated gate valve of power plant valves

Product Details

Vacuum isolated gate valve of power plant valves
Product overview
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 and the tapered block to wedge-up are separated to have zero lead age 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 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 expansive material of high strength to completely isolate the system from air.
5. Two connection ways 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 Less than425degree centigrade and 550 degree centigrade and the working medium of water,steam or air;especially suitable to act as the vacuum isolating sealing for the system of steam turbine's considernation and vacuum negative pressure in steam power plants.
Valve ctrucure type:
Mode1 NKJ61 Vacuum isolating stop valve;Model NKZ44 and NKZ64 Vacuum isolating gate valves.
Manufacture and acceptance standard:
1.Manufacture,acceptance 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.
Material for main parts
Body,Bonnet: 25 or WCB
Valve stem: Cr.stainless steel, 25Cr2MoV
Disc: Cr.stainless steel, 12Cr1MoVA.
Sealing face: H: alloy steel, Y: carbide alloy
Yoke nut: Al bronze
Packing: Expanding compound graphite
Fastener: High-grade carbon steel, Cr.Mo steel

Contact Information

Contact PersonPagan Peng
Fax Number+86-577-67985602
Post Code325105
AddressHe yi Industrial Zone,Oubei
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