By Marc L. Riveland and Andrew Kinser Depending on the methods ball valve manufacturers use to determine their published rated flow capacities, the resulting value may be different, even for virtually ...

To simplify sizing, calculate the desired flow coefficient first and then work with valve manufacturers to complete the selection process. Flow coefficient for 60°F water and a 1-psi pressure ...

However, conventional methods used for establishing control valve pressure drop cannot be used at face value without reviewing all plant operating scenarios.