Control valve authority

Asked by lampanda 5 years, 10 months ago | 1 Answers

What is valve authority? How to calculate it?

1 Answer

ChemKB 5 years, 10 months ago
It is the ratio of the differential pressure when the valve is fully open to valve is in almost closed positions. Valve authority = Open valve resistance / pipe loop resistance The valve turndown ratio is calculated by multiplying the inherent rangeability factor times the square root of the valve authority.