Water Flow Rate Through a Valve formula |
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\( Q_w \;=\; C_v \cdot \sqrt { \dfrac{ p_1 - p_2 }{ SG } }\) (Water Flow Rate through a Valve) \( C_v \;=\; \dfrac{ Q_w \cdot \sqrt{ SG } }{ \sqrt{ p_1 - p_2 } }\) \( p_1 \;=\; \dfrac{ Q_w^2 \cdot SG }{ C_v^2 } + p_2 \) \( p_2 \;=\; p_1 - \dfrac{ Q_w^2 \cdot SG }{ C_v^2 } \) \( SG \;=\; \dfrac{ C_v^2 \cdot ( p_1 - p_2 ) }{ Q_w^2 } \) |
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| Symbol | English | Metric |
| \( Q_w \) = Water Flow Rate | \(ft^3\;/\;sec\) | \(m^3\;/\;s\) |
| \( C_v \) = Valve Flow Coefficient | \(dimensionless\) | \(dimensionless\) |
| \( p_1 \) = Primary Pressure | \(lbf\;/\;in^2\) | \(Pa\) |
| \( p_2 \) = Secondary Pressure | \(lbf\;/\;in^2\) | \(Pa\) |
| \( SG \) = Water Specific Gravity | \(dimensionless\) | \(dimensionless\) |
