Feature Double O-Rings third stem sealing design Blow-out proof stem Built-in ISO5211 direct mounting pad Invisible gland design Pre-load 2 Belleville washer to self-adjust packing Double Stem sealing to comply with TA-LUFT requirements Anti-static devices for ball-stem body Fire safe design and Construction 2 pcs Body Flanged Ball Valve ISO5211 Direct mounting pad for optional Fire safe is avaliable Full Bore Size : 1/2"~12" (DN15~DN300) Working Pressure :150Lb~300Lb /PN16~40 Working Temperature :-20C~250C Material :WCB,CF8,CF8M etc