Valve Flow Rate for Liquid Formulas |
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\( Q = C_v \sqrt{ \Delta p\;/\;SG } \) (US units) \( Q = K_v \sqrt{ \Delta p\;/\;SG } \) (SI units) |
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| Symbol | English | Metric |
| \( Q \) = Valve Flow Rate | \(ft^3\;/\;sec\) | \(m^3\;/\;s\) |
| \( C_v \) = Valve Flow Coefficient (US units) | \( dimensionless \) | \( dimensionless \) |
| \( K_v \) = Valve Flow Coefficient (SI units) | \( dimensionless \) | \( dimensionless \) |
| \( \Delta P \) = Valve Pressure Differential | \(lbf\;/\;in^2\) | \(Pa\) |
| \( SG \) = Liquid Specific Gravity (Water at 60°F = 1.0000) | \( dimensionless \) | \( dimensionless \) |
