Concentric orifice plates calibration and repair
Primary Elements for Flow Measurement
• Orifice Plate: Used for ideal liquid, gases, and steam service. Beta ratio falls between 0.15 to 0.75 for liquids and 0.20 to 0.70 for gases and steam. Best results occur between 0.4 and 0.6.
• Eccentric: Used for measuring containing solids, oil containing water, and wet steam. Bore offset from center to minimize problems in services of solids-containing materials.
• Segmental: Used for colloidal and slurry flow measurement. Tap location should be 180º from the center of tangency.
• Quadrant Edge: Commonly used in Europe and particularly useful for pipe sizes less than 2 inches. Produces a relatively constant coefficient of discharge for services with low Reynolds numbers.
