... .1,BS 21/2779,DIN 259/2999,ISO 2282) Testing: API 5983) Mateiral:ASTM A351 CF8M,CF8,CF3M,SS316,SS304 ASTM ... ) 7) Working medium: Water, Oil, Gas, Acid, Steam,etcFeatures:1) Blow-out proof stem2) Investment Casting Body3) Pressure Blance Hole in Ball ...