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Answer Posted / ch amir islam
Normally we use the CVs that have thier bench set more than
3 to 15 PSI but some time at low pressure line we use CVs
that have bench set of 3 to 15 PSI so we use the i/p of a
possitioner as o/p for traveling of CV but in normal cases
we dnt have i/p of possitioner below than 15 PSI.
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