Determinação dos coeficiente de perda de carga aplicáveis a válvulas diafragma parcialmente abertas
Default

Input data

Diameter

h/H

Output data

k for type (a)

kQ for type (a)

k for type (b)

kQ for type (b)

Description

Find the head loss coefficients for partially open diaphragm valves.

Given the diameter and the opening grade of a diaphragm valve and its model, calculates de head loss coefficients applied to the formulae:

  • For k applicable to:
    hf=kU22g hf = \frac{k \cdot U^2}{2\cdot g}
  • For kQk_Q applicable to:
    hf=kQQ2 ℎf = k_Q\cdot Q^2

Diaphragm valve

References

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