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Head loss coefficient applicable to partially open diaphragm valve

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:

  1. For k applicable to:
    hf=k⋅U22⋅g hf = \frac{k \cdot U^2}{2\cdot g}
  2. For kQk_Q applicable to:
    hf=kQ⋅Q2 ℎf = k_Q\cdot Q^2

Diaphragm valveDiaphragm valve

References

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