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Calculations

Head loss coefficient applicable to totally open gate valve

Default

Input data

Diameter

a/A

Output data

k for θ = 10°

kQ for θ = 10°

k for θ = 20°

kQ for θ = 20°

Description

Find the head loss coefficients for fully open gate valves.

Given the diameter and the passage area/pipe area of a gate valve, calculates de head loss coefficients applied to the formulae:

For k applicable to: $hf = \frac{k \cdot U^2}{2g}$
For $k_Q$ applicable to: $ℎf = k_Q\cdot Q^2$

Gate valve

Description

Find the head loss coefficients for fully open gate valves.

Given the diameter and the passage area/pipe area of a gate valve, calculates de head loss coefficients applied to the formulae:

For k applicable to: $hf = \frac{k \cdot U^2}{2g}$
For $k_Q$ applicable to: $ℎf = k_Q\cdot Q^2$

Gate valve

References

Miller, Donald S. Internal flow systems. BHRA Fluid Engineers, 1978.