1.Standard: GB 12238 BS5155 API609, MSS SP-76,DIN 3202-K1 (ISO 5762 T5). 2.Safe working pressure: PN6,10,16 3.Size: 2"-14" 1. Size: 2"(DN50) ~ 14" ( DN350).2. With soft/back-up seat and double D or TD type disc without pin.3. Operated stype:Handles (2" to 12") Manual Gear Operators (2" to 14") Electric or pneumatic actuators (2" to 14")4.Standard: GB 12238 BS5155 API609, MSS SP-76,DIN 3202-K1 ( ...