API 6A gate valve, non-rising stem, rising stem, welded, threade, d, union or colar connection end. casting/forging body. API 6A gate valve: The designs ... with preloaded spring, operation torque is little. The wedge valve gate is sealed by wedge seal surface ,it can adjust fit compactness between ... ~ 4Material ClassAA ~ FFPerformance Requirement LevelPRl & PR2Working TemperatureK~ V Slab Gate valve