Primary Flow Signal, Inc. (PFS)
PFS - Orifice Unions (OU)
Orifice Unions are ready to install assemblies used to measure and control flow or to reduce pressure in a pipe system. They are comprised of Gaskets, Hardware and Orifice Flanges that contain pressure sensing ports. An orifice plate is also typically used with the orifice union. Once installed (welded in line), connect your dP flow transmitter and you are ready to measure flow. Configurations of this assembly are adaptable to almost any line conditions. Components that comprise the assembly can be precisely specified for any application, with carbon steel flanges and a stainless-steel orifice plate being the most common variation.
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+/- 0.50 to 0.75% Uncalibrated Uncertainty
Lower Cost, Field Welded Install
- Line size: 1/2 to 40 inches
- Meets ISO, AGA, ASME, API Requirements
- Flange Taps / Corner Taps
- 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