Compared to an orificemeter, a venturimeter is preferred in flow measurement pipelines primarily because it has:
Choose the correct answer
Higher discharge coefficient (Cd ≈ 0.98) and lower permanent head loss
Lower Cd (≈0.62) giving more accurate differential pressure
Simpler construction at lower manufacturing cost
Higher permanent head loss enabling better energy recovery
Correct Answer
A. Higher discharge coefficient (Cd ≈ 0.98) and lower permanent head loss
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Venturimeter has Cd ≈ 0.97–0.99 vs ≈0.62 for orificemeter. Its gradual diverging cone (7°) recovers 75–80% of pressure drop, making permanent head loss only 10–15% of differential head. Orificemeter is cheaper but wastes more energy.
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