เหตุผลที่วาล์วต้องอาศัยหัวขับวาล์วในการควบคุมมีดังนี้ The metallic seat or maybe a resilient seat style generally demands a additional sturdy building because of the upper fluid velocities – which could damage a standard resilient seat butterfly valve. Valve Running Technique (VOS) is a complete system utilized to control and drive the valve open and shut https://pneumaticactuator04725.jiliblog.com/72974979/5-simple-techniques-for-ห-วข-บวาล-ว