How do you calculate risk and return in Excel?
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Why control valve size is smaller than line size?
An oversized valve is very sensitive to operating conditions. Even the smallest changes in valve position will cause significant changes in flow. This makes it difficult or even impossible for the valve to exactly adjust to the required flow. Properly sized globe valves are usually one size smaller than the line.
What is CV ball valve?
Valve Flow Coefficient (Cv) is a valve’s capacity for a liquid or gas to flow through it. It is technically defined as “the volume of water at 60°F (in US gallons) that will flow through a valve per minute with a pressure drop of 1 psi across the valve.”
How do you choose valves?
The right valve choice means matching the valve’s size to expected flow through the system. Know the chemical compatibility requirements. The valve materials need to be compatible with the gases or liquids flowing through it. Plastic valves usually resist harsh or corrosive chemicals better than metal valves.