Control Valve's Controlbility Range
Control Valve's Controlbility Range
(OP)
Please help on the questions below.
I know that valve's good controllability range is from 20% to 80% opening. Dose this rule apply to all kinds of valves, what about a ball valve??
Are the steps used to design a PCV same as steps for a FCV??
Thanks for your help on this issue
I know that valve's good controllability range is from 20% to 80% opening. Dose this rule apply to all kinds of valves, what about a ball valve??
Are the steps used to design a PCV same as steps for a FCV??
Thanks for your help on this issue





RE: Control Valve's Controlbility Range
John
RE: Control Valve's Controlbility Range
Hope this helps.
saxon
RE: Control Valve's Controlbility Range
Even valves within a particular type, say globe type, can have vastly different characteristics, as well as rangeability through the variety of plug styles.
Valves, in order to have controllability have to have some pressure drop associated with them. For that reason, ball valves do not have good controlability at or near 100% opening, while a globe style valve with the right trim and characteristic might have good controlability all the way out to 100%.
Lots of variablility in this topic.
rmw