Precision-engineered opening in an orifice plate for accurate fluid flow measurement and control in industrial systems.
The orifice bore is the precisely machined circular opening in an orifice plate, a primary element in differential pressure flow measurement systems. It creates a constriction in the fluid flow path, generating a measurable pressure drop that correlates to flow rate according to Bernoulli's principle and continuity equations. The bore's geometry, edge sharpness, and dimensional accuracy are critical for measurement precision.
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Beta ratio (β) is the ratio of bore diameter to pipe internal diameter (d/D). Critical for flow calculation accuracy, typically maintained between 0.2-0.75 per ISO 5167.
Sharp, square edges (≤0.0004d radius) ensure consistent vena contracta formation and predictable pressure drop. Worn or rounded edges cause flow coefficient drift and measurement errors up to 5%.
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