This stop valve has three types:CS to ASTM, AS to ASTM, SS to ASTM Application of the medium: water, steam, oil, etc.

1) Design and manufacture :By ANSI . B16.34; API 602.

2) Size-end connectivity:1)Jack for size:By ANSI  B16.11; JIS B2306

3) Screw terminal size:By ANSI B1.20.1  BS21;JIS B0203; ISO7/1

4) Valve inspection and testing:By API  598

5) Structure:  B.B;OS&Y or W.B;OS&Y

6) Materials:By AISI/ASTM Provisions

7) The main material:A105; F5;F11;F22; 304; 304L; 316; 316L; LF2,etc.