Applichble medium:water,gas,oil product,natural gas and corrosive mediums ssacids,alkclis,etc. Applicable Temperature ：≤300°C Driving Means:Manual,Worm Wheel,pneumatic,motor,hydro-dynamic,etc Design：ASME B16.34,API608 Fire Safe：API607 4th 1993 Face to face：ASME B16.10 Eed Flange：ASME B16.5 Inspection&Testing：API598，API6D