Water Flow Rate Through a Valve
Water Flow Rate Through a Valve formula |
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\( Q_w = C_v \; \sqrt { p_1 - p_2 \;/\; SG } \) | ||
Symbol | English | Metric |
\( Q_w \) = water flow rate | \(ft^3\;/\;sec\) | \(m^3\;/\;s\) |
\( p_1 \) = primary pressure | \(lbf\;/\;in^2\) | \(Pa\) |
\( p_2 \) = secondary pressure | \(lbf\;/\;in^2\) | \(Pa\) |
\( C_v \) = valve flow coefficient | \(dimensionless\) | |
\( SG \) = specific gravity of water | \(dimensionless\) |
Water Flow Rate Through a Valve formula |
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\( Q_w = C_v \; F_l \; \sqrt { p_1 \;-\; F_f \; p_{av} \;/\; SG } \) | ||
Symbol | English | Metric |
\( Q_w \) = water flow rate | \(ft^3\;/\;sec\) | \(m^3\;/\;s\) |
\( p_{av} \) = absolute vapor pressure of the water at inlet temperature | \(lbf\;/\;in^2\) | \(Pa\) |
\( F_f \) = liquid critical pressure ratio factor | \(dimensionless\) | |
\( p_1 \) = primary pressure | \(lbf\;/\;in^2\) | \(Pa\) |
\( F_l \) = id pressure recovery factor (= 0.9) | \(dimensionless\) | |
\( C_v \) = valve flow coefficient | \(dimensionless\) | |
\( SG \) = specific gravity of water | \(dimensionless\) |
Tags: Flow Water Valve Sizing