First, ANSI American Standard main purpose valve

Flanged steel gate valve for ANSI Class150 ~ 900, PN2.0 ~ 16.0MPa, JIS10 ~ 20K, working temperature -29 ~ 425 ℃ (carbon steel) and -40 ~ 500 ℃ (stainless steel) Used to cut off or switch on the medium in the line. 

Through the selection of different materials, can be applied to water, steam, oil, nitric acid, acetic acid, strong oxidizing media and urea and other media. There are manual, bevel gear and electric and so on.