Principle:EMCO orifice plate are used as primary elements in flow measurement of liquid, gas and steam according to the differential pressure principle
For dimensions of flanges click the product sheet at the top of the page.
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Design and calculation standards
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ISO 5167-2, ASME MFC-3M, DIN 19205, Shell Flow Meter Engineering Handbook, L. K. Spink, AGA no. 3
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Sizes
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DN 50 - 1200, 2" - 42"
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Pressure rating
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PN 10 - 400, 150 - 2500 lbs
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Plate thickness
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3 - 8 mm
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Vent or drain hole
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On Request
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Material
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AISI 316, AISI 304 22Cr Duplex, 16Mo3, 13CrMo4-5, other materials on request.
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Mounting Style
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Between flanges with flat or raised face or groove according to DIN 2526, 2513, 2512, EN 1092-1 or RF according to B 6.5
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Pressure taps
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3/8", 1/2" BSP male, Ø 12 mm, 1/2" NPT
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Tap Length
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150 mm, others on request.
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Tap Location
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At least 45 degrees apart To be stated with order
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Connection
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Flanges with flat or raised face or groove according to DIN 2526, 2513 or 2512, or RF and RTJ according to ANSI B 16.5
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Orifice plate shapes
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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
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Marking
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The orifice plate is marked with "+" and"-" and flow direction.
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Accuracy
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+/- 0,6 % for β < 0,6 and equal to β for β values above 0,6
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Pressure loss
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Depending on β, for β equal to 0,6 : ca. 60 % of the differential pressure measured
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Limits for Reynolds No
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Re > 1260 x β2 D according to ISO 5167 2000 < Re < 108 according to ASME MFC-3M
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Accessories |
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Shut-off valves and condensing chambers for steam flow measurement. Flange assembly complete with bolts, nuts and gaskets
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