เหตุผลที่วาล์วต้องอาศัยหัวขับวาล์วในการควบคุมมีดังนี้ It installed in the air route for the cylinder to get the pressure sign within the positioner outlet, supplying a sizable flow rate towards the actuator, utilized to improve the velocity of valve action. Here is the selection of ambient temperatures where the solenoid valve is designed to operate. https://pressure-gauge-432097.blogthisbiz.com/19877510/the-best-side-of-pressure-gauge