เหตุผลที่วาล์วต้องอาศัยหัวขับวาล์วในการควบคุมมีดังนี้ The stem is an element of your valve in which the Main or plunger is attached. Given that the Main is captivated via the coil, the stem moves in addition to it to actuate the valve. The ball valve and the actuator are connectec by using an interface. This https://pressure-gauge-digital90986.answerblogs.com/15699288/วาล-ว-fundamentals-explained