Primary Flow Signal, Inc. (PFS)
PFS - Orifice Plates (OP)
Orifice plates are common differential producer type flow elements for the measurement of liquids, gases and steam flow. Orifice plates are used for measuring and controlling fluid flow and can also be used to reduce pressure in a pipe system. The concentric, square edge type of orifice plate is the most frequently used, offering low cost, accuracy, ease of installation and rapid availability.
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Flow Measurement / Flow Restriction
+/- 0.5-0.75% Uncalibrated Uncertainty
Liquids and Gases, Lower Cost
- Line size: 1/2 to 40 inches
- Meets ISO, AGA, ASME, API requirements
- Recommended pipe Reynolds number: Greater than 10,000 basic accuracy
- Line Size: ½” to 48” Standard (special sizes available)
- Head loss % of Differential: 30% to 70% Beta Dependent
- Basic Accuracy (% of Total): +/- 0.25 (Calibrated) +/- 0.50% to 0.75%, Beta Dependent (Uncalibrated)
- Minimum pipe Reynolds number: Must be greater than 10,000, Added uncertainty under 10,000
- Required Straight Piping: Per ISO, AGA, ASME, API standard as applicable, 5 to 70 Pipe Diameters
- Beta Range: 0.20 to 0.75
- Useful Service Life: Long, Check Periodically if Erosive Fluid is a Concern
- Service Functional Limits: Clean liquids & gases
- Vent or Drain Holes: Vent or drain holes are available to let trapped gas or condensate pass