The cock's open-close part uses hole tent to realize open-close action valve through the body and pole of valve rotation.the cock have simple structure and rapid open-close， little flow resistance， for these years，the cock is favored by the market.

ONE、series of two types

1.X43F：the special-designed valve seat coat and steel tent compose the sealing auxiliary：the tent is stainless.

2.X43F46：thewayofallvalveandtentlinedFEP， the expanded liner PEA， PCTFE and the contraposition ploy-benzene material with the to pof300C temperature to meet the requirement under all kinds of work condtions .X43F4ANDX43F 46 Lubricant cock valves have special rocker adjustable equipment and idea taper design.they possess the function of good sealing performance，long life for usage and simultaneous in-outside seal in，the little coefficient of attrition and the active tent doesnt need lubricating

3.X6D3FandX6C3F：thecockvalve，combined weld port with socket weld port，is based on the X43F4 the class of pressure can reach ANSI900Lb.

TWO、characteristic of X43F：

1.The entranced window is designed as du always and sea ing circle groove， it can produce enough sealing press when it is placed at the full open or full close， the sealing auxiliary reach to zero leaking

2.Du always of groove sealing circle not only make the PTFE fix inside the valve but also absorb mini-deformation of liner coat because of the temperature change.at the sametime， the cleanse between the lining and cock improve the usage life of sealing surface.

3.The top of tuck bearing adopt PTFE and O circle to compose the adjustment washer， for this it wll adjust the sealing press but also make the tent active move flexibly to ensure the sealing of in-outside and middle flange joint end.

4.The full sealing process almost has nothing to do with the inner pressure of th pipeline.

5.The PTFE lining material adopt various packing stuff according to temperature and work medium.it possess good lubrication and long life for usage.

THREE、criterion of design

It adopts the standard of GB12240， GB/T22130， API599.

FOUR、way of drive：Manual， power-driven， worm-gear-driven.