Applicable standards:
1:Design and manufacture standard:GOST 33259
2:Face to face dimension standard:GB/T 12234;DIN3202-F4/F5/F7/F9
3:Flange ends standard(RF/RTJ):GOST 12815
4:Butt weld ends standard:ANSI B16.25
5:Inspect and test standard:GOST 33259
6:Others:As manufacturer or as client request

Features:
1:Full port/standard port;FP,SP
2:Outside screw and yoke;
3:Bolted bonnet,BB;
4:Flexible wedge;
5:Rising stem;
6:Overall valve seat;replaceable seat
7:Hard faced 13CR%,STL etc
8:Others:NACE standard is workable;OEM/ODM;
Support customization.