เหตุผลที่วาล์วต้องอาศัยหัวขับวาล์วในการควบคุมมีดังนี้ Removing the pneumatic pressure will cause the piston to maneuver downward as a result of pressure on the spring. This motion is often called Air-to-Retract. Valve Working Program (VOS) is a whole technique accustomed to control and travel the valve open and shut functionality Biffi’s choice of intelligent quarter https://butterflyvalve21593.canariblogs.com/pressure-gauge-4-an-overview-30720795