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Head loss coefficient applicable to partially open angle valve

Input data

Diameter

Opening fraction (%)

Output data

k applicable to h = k.U²/2g

kQ applicable to h = kQ.Q²

Description

Find the head loss coefficients for partially angle valves.

Given the diameter and the opening relation of an angle valve, calculates the head loss coefficients, for the expressions:

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

Angle valveAngle valve

References

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