Pneumatische Rising Flachschieber, mit parallel ste

The description: 1.Pneumatic Rising stem gate valve(with balance stem) is new kind of valve, which is applied to control the system and will cut-off when emergency.2.Standrad: API Spec 6A and SY/5127Working principle: 1.By using the hand wheel and cylinder to control the gate moving to open or close the valve and Intake on the up stomatal(clockwise),valve close; Intake of on the down stomatal(counterclockwise)valve open. 2Manual / automatic status switch: The valve has two kinds of operation mode,when in manual. We should Pin plug connection , and when in automatic,we should Pin out.Sichuan Tiangong Gas&Oil Valves Co.,ltd