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