1. hollow streamlined valve body, straight through axial symmetrical flow channel, the section is ring;
2.built-in crank slider mechanism, the valve is fast and then slow, there will be no sudden change of pressure and valve water hammer;
3.double sealing structure of metal-metal and metal-elastic materials;
4.the linear relation between the opening and the flow rate can adjust the medium precisely；
5.different types of throttling elements: fan ring type, slot type, multi-jet type, circulation type and other special design, to meet different working conditions.
1. design, manufacture and acceptance q/td02-2016;
2. flange connection size gb/t17241;
3. pressure test gb/t13927.
seal test pressure：1.1pn；
shell test pressure：1.5pn；
1. gravity artesian transmission line;
2. the pipeline pressure and flow need to be adjusted.