... JIS 10K,BS10 TABLE "E"Optional Materials:Body: Cast Iron GG25, Ductile Iron GGG40, GGG50Disc: DI+Nickel painted,SS304/316,AL ... SS316Actuator: Lever, Worm Gear, Pneumatic and Electric ActuatorProduct characters:1. Rubber backed seat with stable valve torque.2. Grooved ... resistance.6. Suitable medium: water, sewage, sea water, air, steam, food, medicament, oils, acids, alkalis, salts etc. No leakage ...