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EMCO Orifice Plate with Single Pressure Tapping Series MEF/2 for Insertion between RTJ Flanges

Principle: EMCO orifice plate are used as primary elements in flow measurement according to the differential pressure principle. The tapping arrangement is corner tapping. 

Images & drawings

Dimensions for ASME & API flanges

For dimensions of flanges click the product sheet at the top of the page.

Construction
Design and calculation standards
ISO 5167-2 2003, ASME MFC-3M, ANSI B 16.5, Shell Flow Meter Engineering Handbook
Sizes
DN 50 - 600, 2" - 24"
Pressure rating
300 - 2500 lbs
Plate thickness
3 - 8 mm
β (d/D)
0,1 < β < 0,75
Vent or drain hole
On Request
Material
AISI 316, AISI 304 22Cr Duplex, 16Mo3, 13CrMo4-5, other materials on request.
Mounting Style
Between flanges with RTJ according to ANSI B 16.5 or to API
Pressure taps
Threaded: ½" NPT int. (standard) or ½” BSP. Flanged: ½” and ¾”, 300, 600, 1500 and 2500 lbs RTJ.
Tap Location
At least 15° apart, depending on size and pressure rating
Orifice plate, shapes
Integrated with holder. Square edge concentric, square edge eccentric, conical, 1/4 circle, segment. The plate is bevelled on the down stream side except for 1/4 circle orifice plate
Marking
The orifice plate is marked with "+" and"-" and flow direction.
Technical Data
Accuracy
+/- 0,5 % for β < 0,6 and equal to β for β values above 0,6ove 0,6
Pressure loss
Depending on β, for β equal to 0,6 : ca. 60 % of the differential pressure measuredntial pressure measured
Limits for Reynolds No
Re(D) > 5000 for 0,1< β < 0,56 and Re(D) > 16000 x β 2 for β > 0,56 according to ISO 5167-2 2003 2000 < Re < 108 according to ASME MFC-3M 108 according to ASME MFC-3M