User talk:Cungv

Improve 2.1 The Structure The unidirectional metal seal ball valve major parts have the left valve chest (to contain integrated valve seat), the right valve chest, the spheroid, the right valve seat, the elastic pad and the valve lever and so on, in the left valve chest and under the stereoscopic contact part, the built-up welding department too stereo metal or uses the supersonic speed to emit the metallics, obtains ultra emits hardly the level, and makes the integrated valve seat packing surface directly on. The spheroid also uses the supersonic speed to hope that emits the surface hardening technology. The right valve seat does not play the seal role, does not need to carry on surface hardening processing. The elastic pad may use the flexible graphite, may also use the elastic spring. 2.2 Principles Of Work. The unidirectional metal seal ball valve is in the ordinary two piece of type metal seal ball valve's foundation to make the improvement. Are constituting the integrated valve seat together continually the left valve seat and the left valve chest. In spheroid and left valve chest integrated valve seat constitution seal packing collar. Ball valve's has the directivity on pipeline installment, left side and downstream pipeline connection, right margin and upstream line connection. The spheroid wants the tight thrust force through upstream line's pressure and from the right valve seat bottom end's elastic pad the combined action, causes the spheroid to cling in the left valve chest the integrated valve seat, forms seals vice-achieves ball valve's seal. The right valve seat only plays the guidance to the spheroid and wants tightly role. Because has used the integrated valve seat, both reduced ball valve's spare part quantity,