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What is valve authority?

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What is valve authority?

Picard Product_Support
‎2018-09-06 02:30 PM

Last Updated: Gary Schneider Alumni (Retired) ‎2022-08-19 05:51 AM

Issue

What is valve authority?

Product Line

Field Devices

Environment

Any valve

Cause

Information on Valve Authority to obtain good control.

Resolution

Valve Authority = (Pressure drop across fully open control valve) / (pressure drop across the remainder of the circuit) + (pressure drop across fully open valve)

In other words, valve authority within a system indicates how much of the system's total pressure drop comes from the control valve. It is common practice to consider the range between .2 to .5 as "acceptable" authority for proportional valve.

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