22 Most important,frequently asked Control Valve Interview Question and Answers

Hi to All, In this video you are going to know 22 most important, frequently asked control valve basic Questions & Answers. 1. What is a ‘control valve’? 2.What is meant by control valve trim? 3. What is Cv of a valve? 4.What is a good CV value? 5. What is control valve actuators? 6. What is control valve positioners? 7.What is called ‘stem travel’? 8.What is valve body? 9. what is yoke in valve? 10.What is gland packing? 11.What are the three main parts of an automatic control valve? 12.What are the different types of control valves? 13. What is a double seated control valve? Where in general it is used? 14.What is a single seated balanced trim? 15.What is a ‘direct acting’ and ‘reverse acting’ atuators? 16.What is an ‘over sized’ control valve? How to solve an oversize problem? 17.What is a bench set on a control valve actuator? 18.Why is a valve positioner preferred even on a control valve having a bench set 20-100 kPa? 19.What are the possible reasons if a control valve fails to open/close? 20. What is a ‘lantern ring’? Where is it located on a control valve? 21.What is fail open control valve? 22.What are the 3 most common control valve flow characteristics? Please subscribe for more Instrumentation Interview Questions & Answers videos