手動式・空圧式・電動式のボールバルブ:バルブの操作方法に応じて選ぶ
A manual, a pneumatic and an electric ball valve can share the same body, the same seats and the same fluid conditions. The difference is not inside the valve. It is in who or what rotates the ball, how often it happens, and what the system should do when air or power is lost. Selection goes wrong when it starts from the question “which type is more advanced.” It goes right when it starts from the operating situation on site: how often the valve operates, whether an operator can reach it, what utilities already exist, and whether a control system needs to command the valve or know its position. A […]
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