Principle:EMCO orifice plate are used as primary elements in flow measurement of liquid, gas and steam according to the differential pressure principle
DN |
Inches |
Total length (mm) |
---|---|---|
10
|
3/8”
|
400 mm
|
15
|
½”
|
550 mm
|
20
|
¾”
|
700 mm
|
25
|
1”
|
900 mm
|
32
|
1 ¼”
|
1100 mm
|
40
|
1 ½”
|
1300 mm
|
50
|
2”
|
1500 mm
|
Design and calculation standards
|
ISO 5167, ISO/TR 15377, BS 1042, ASME Fluid Meters, DIN 19205Shell Flow Meter Engineering Handbook
|
Sizes
|
DN 10 – DN 50, 3/8” - 2"
|
Pressure rating
|
PN 10 - 400, 150 - 2500 lbs
|
Plate thickness
|
3 mm
|
Vent or drain hole
|
On Request
|
Plate Material
|
AISI 316, other on request.
|
Carrier ring and pipe material
|
Carbon steel, AISI 316, other materials on request
|
Pipe run
|
Can be honed for increased accuracy
|
Flange standards
|
DIN, AISI B 16.5
|
Pressure taps
|
3/8", 1/2" BSP, Ø 12 mm, 1/2" NPT.int.
|
Male tappings
|
On Request
|
Connection
|
Weld ends or 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
|
Orifice plate shapes
|
Square edge concentric, other shapes on request. Orifice plates are bevelled on the downstream side
|
Marking
|
The orifice plate is marked with "+" and"-" and flow direction.
|
Accuracy
|
+/- 0,8 - 1 %
|
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 β2 D according to ISO 5167 2000 < Re < 108 according to ASME MFC-3M
|
Accessories |
|
---|---|
Shut-off valves and condensing chambers for steam flow measurement. Flange assembly complete with bolts, nuts and gaskets
|
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