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EMCO Orifice Plates Series ISB/1 for RF Flanges

Principle: EMCO orifice plates are used as primary elements in flow measurement
of liquid, gas and steam according to the differential pressure principle.

Images & drawings

Construction
Design and calculation standards
ISO 5167-2, ASME MFC-3M, ISA RP 3.2, Shell Flow Meter Engineering Handbook, L. K. Spink, AGA no. 3
Sizes
1" - 24" according to ANSI b 16.36, 50 mm < D < 1000 mm according to ISO 5167-2 and 50 mm < D < 900 mm according to ASME MFC-3M
Pressure rating
300 - 2500 lbs RF
Plate thickness
3 - 16 mm depending on plate size
Bore (d)
d > 12,5 mm
β (d/D)
0,2 < β < 0,75 for highest accuracy.
Vent or drain hole
On request
Material
AISI 316, Duplex, Monel, 6Mo, Titanium, others on request
Mounting style
Between raised face flanges according To ANSI B16.36 or DIN 19214, other standards on request
Orifice plate shapes
See above illustration. Square edge concentric, conical, 1/4 circle, segment
Handle
With name plate in AISI 316 with the following inscription : TAG no., serial no., pressure rating, inner pipe diameter., bore, material.
Technical Data
Accuracy
+/- 0,6 % for β < 0,6 and equal to β for values above 0,6
Pressure loss
Depending on β, for β equal to 0,6 : ca. 60 % of the differential pressure measured
Limits for Reynolds No
Re > 1260 x β^2 D according to ISO 5167 2000 < Re < 10^8 according to ASME MFC-3M