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ORIPAC MODEL 4150-P

•	About the Oripac Model 4150-P	•	Dimension Sheet		Tech Support Sheet
•	Part No. Reference System	•	Specification Sheet	•	Installation Instructions

MODEL 4150-P TECH SUPPORT SHEET

The importance of proper pressure tap connections for orifice plate installations is often minimized or overlooked in the field. Faulty connections nullify the precision of the machining in the manufacture of the orifice plate and calibration accuracy of the secondary instrument. An Oripac, properly installed, will provide satisfactory, low-cost service over a wide capacity range.

Lambda Square, Inc. has developed the ORIPAC to combine accuracy of measurement with certainty of correct installation.

The many advantages in their installation and operation clearly indicate the superiority of the ORIPAC for the majority of conditions under which an orifice installation is suitable.

Overall Pressure Loss Across
Thin-Plate Orifices (Oripac)

The above curved graph shows pressure loss generated by the ORIPAC. For example, a 0.6 Beta Ratio (d/D) would show a loss of 62%. This is also shown on the linear graph area ratio (d/D)² =.38 with a loss of 62% of the differential pressure.

As a quick check reference, you can use the formula:
Headloss=1-Beta Ratio² eg: 1-.62² or 1 - .38 = 62% of the differential pressure.

Source: ASME Research Report on Fluid Meters

MODEL 4150-P

ACCURACY

The Oripac utilizes the corner tap proportions as defined in ISO 5167. The ASME Fluid Meters Research Committee has suggested that the dimensionless coefficient equation developed by the International Standards Organization (ISO) and presented in ISO 5167 is significantly better for the broad spectrum of flow measurement applications throughout process industries.

The coefficient values used in the ORIPAC bore calculations represent the same confidence level assigned to the flange and radius taps widely accepted in fluid flow measurement.

The accuracy assigned to the coefficient values is ± 0.6% full scale for d/D (Beta) values 0.2 to 0.6 and ± ß% for Beta values 0.6 to 0.75 (i.e. ß of 0.7 would have an uncertainty value of ± 0.7% full scale).

Accuracy of the differential signal produced by the ORIPAC equals that of a properly manufactured and installed flange or radius tap orifice meter.

Lambda Square, Inc • 1-800-587-5423 • Tel: 631-587-1000 • Fax: 631-587-1011

Lambda Square, Inc. specializes in the manufacture of differential pressure flow measurement equipment including venturi tubes, orifice plate and orifice flanges, meter tubes, orifice holding blocks, orifice restriction unions, sanitary plates, single and dual chamber fittings, ASME flow nozzles, manifolds, straightening vanes, elbow flow meters, seal pots and many other liquid, gas and steam control products.
Please contact Lambda Square with any questions concerning design and custom manufacture.
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Over 50 Years of Differential Pressure Flow Metering Experience...	Email info@LambdaSquare.com