Principle:EMCO orifice plate are used as primary elements in flow measurement of liquid, gas and steam according to the differential pressure principle
DN |
Ø Inner pipe |
Upstream length ISO 5167 |
Total length ISO 5167 |
Upstream length DIN 19215 |
Total length DIN 19215 |
|---|---|---|---|---|---|
|
50
|
45 - 57
|
115
|
230
|
150
|
250
|
|
65
|
58 - 72
|
145
|
290
|
180
|
300
|
|
80
|
73 - 90
|
180
|
360
|
230
|
350
|
|
100
|
91 - 112
|
225
|
450
|
280
|
400
|
|
125
|
113 - 137
|
275
|
550
|
350
|
500
|
|
150
|
138 - 162
|
325
|
650
|
400
|
600
|
|
(175)
|
163- 187
|
375
|
750
|
470
|
700
|
|
200
|
188 - 225
|
450
|
900
|
570
|
800
|
|
250
|
226 - 275
|
550
|
1100
|
690
|
1000
|
|
300
|
276 - 325
|
650
|
1300
|
820
|
1200
|
|
350
|
326 - 375
|
750
|
1500
|
950
|
1400
|
|
400
|
376 - 425
|
850
|
1700
|
1050
|
1500
|
|
450
|
426 - 475
|
950
|
1900
|
1200
|
1700
|
|
500
|
476 - 550
|
1100
|
2200
|
1370
|
2000
|
|
600
|
551 - 650
|
1300
|
2600
|
1500
|
2000
|
|
700
|
651 - 750
|
1500
|
3000
|
1500
|
2000
|
|
800
|
751 - 850
|
1700
|
3400
|
1500
|
2000
|
|
900
|
851 - 950
|
1900
|
3800
|
1500
|
2000
|
|
1000
|
951 - 1100
|
2200
|
4400
|
1500
|
2000
|
|
Design and calculation standards
|
ISO 5167-2, ASME MFC-3M, DIN 19215, Shell Flow Meter Engineering Handbook, AGA no. 3
|
|
Sizes
|
DN 50 - 1000 according to DIN 2402
|
|
Pressure rating
|
PN 10 - 400, 150 - 2500 lbs
|
|
Plate thickness
|
10 mm
|
|
Vent or drain hole
|
On Request
|
|
Material
|
Carbon steel P235GH, AISI 316, 16Mo3, 13CrMo4-5, 10CrMo9-10, WB 36, X20CrMoV121, other materials on request
|
|
Mounting Style
|
Weld ends according to DIN 2559 or ANSI B16.25
|
|
Pressure taps
|
Ø 21.3 mm, 24 mm, 26.9 mm, ½" BSP male, ½" NPT male
|
|
Tap Length
|
150 mm, others on request.
|
|
Tap Location
|
Tap location for steam flow: 180°. At least 45° apart for liquid and gas. To be stated with order
|
|
Orifice plate shapes
|
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.
|
|
Accuracy
|
+/- 0,5 % for β < 0,6 and equal to β for β 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 β2 D according to ISO 5167 2000 < Re < 108 according to ASME MFC-3M
|
Accessories |
|
|---|---|
|
single and double shut-off valves and condensing chambers for steam flow measurement
|