1. General Introduction
RAMC variable area flow meter combines all the advantages of the variable area principle with robust design, reliable measurement, with or without power, HART, culminating in a truly universal flow meter for gases, liquids and steam applications. Its special application is in troubled, opaque or aggressive mediums. The instrument is mounted in a vertical pipeline with flow direction upwards. Inside the special shaped conic metal tube, a float is guided concentrically. The position of this float is magnetically trans¬mitted to the indicator. The indicators are exchangeable without influence on the accuracy.
Besides, RAMC variable area flow meter come with several outstanding features as: Different process connections like flanges according to EN and ASME, All wetted parts in stainless steel or PTFE, Float damping to avoid float bouncing with gas applications, Indicator in stainless steel, aluminum, protection class IP66/67, Local indicator or Electronic transmitter is selectable and etc.
2. Flow Table for Metal Tubes
Measuring range for water and liquids | Measuring range for air and gases | |||||||||||||
Recommended Combinations | Alternative Combinations | Recommended Combinations | Alternative Combinations | |||||||||||
Max. Flow | Float Combination | Pressure Loss | Viscosity | Float Combination | Pressure Loss | Viscosity | Max. Flow | Float Combination | Pressure Loss | Float Combination | Pressure Loss | |||
m3/h | gpm | Code | mbar | mpa*s | Code | mbar | mpa*s | m3/h | m3/h I.N. | scfm | Code | mbar | Code | mbar |
0.025 | 0.11 | 43 S0 | 40 | 10 | — | — | — | 0.75 | 0 | 0.44 | 43 S0 | 45 | — | — |
0.04 | 0.18 | 44 S0 | 40 | 80 | — | — | — | 1.2 | 1.1 | 0.7 | 44 S0 | 45 | — | — |
0.063 | 0.28 | 47 S0 | 40 | 80 | — | — | — | 1.8 | 1.7 | 1.05 | 47 S0 | 45 | — | — |
0.1 | 0.44 | 51 S0 | 40 | 80 | — | — | — | 3 | 2.8 | 0.75 | 51 S0 | 45 | — | — |
0.13 | 0.57 | 53 L1 | 12 | 50 | — | — | — | 4 | 3.6 | 2.3 | 53 L1 | 13 | — | — |
0.26 | 0.7 | — | — | — | 53 M1 | 15 | 100 | 5.5 | 5 | 3.2 | — | — | 53 M1 | 21 |
0.22 | 1.0 | 54 L1 | 12 | 50 | — | — | — | — | — | — | — | — | — | |
0.25 | 1.1 | 53 S1 | 40 | 100 | 54 M1 | 15 | 100 | 6.5 | 6 | 3.8 | 54 L1 | 13 | — | — |
0.32 | 1.4 | — | — | — | 57 L1 | 12 | 50 | 9 | 8.5 | 5 | — | — | 54 M1 | 21 |
0.4 | 1.8 | 54 S1 | 40 | 50 | 57 M1 | 15 | 50 | 10 | 9 | 5.7 | 57 L1 | 13 | — | — |
0.5 | 2.2 | — | — | — | 61 L1 | 12 | 50 | 14 | 13 | 8 | — | — | 57 M1 | 21 |
0.63 | 2.8 | 57 S1 | 40 | 50 | 61 M1 | 15 | 100 | 16 | 15 | 9 | 61 L1 | 13 | — | — |
0.8 | 3.5 | — | — | — | 62 L1 | 12 | 50 | 22 | 20 | 12 | — | — | 61 M1 | 21 |
1.0 | 4.4 | 61 S1 | 40 | 100 | 25 | 23 | 14 | 62 L1 | 13 | — | — | |||
1.6 | 7.0 | 62 S1 | 40 | 100 | — | — | — | 34 | 32 | 20 | — | — | 62 M1 | 21 |
2.2 | 10.1 | — | — | — | 62 V1 | 45 | 50 | 50 | 45 | 28 | — | — | 62 S1 | 45 |
1.3 | 5.7 | 63 L2 | 17 | 50 | — | — | — | 40 | 36 | 23 | 63 L2 | 19 | — | — |
2.1 | 9.2 | — | — | — | 64 L2 | 17 | 50 | 50 | 47 | 29 | — | — | 63 M2 | 23 |
2.5 | 11 | 63 S2 | 42 | 30 | 64 M2 | 17 | 10 | 60 | 55 | 35 | 64 L2 | 19 | — | — |
4 | 17.6 | 64 S2 | 42 | 10 | — | — | — | 85 | 80 | 50 | — | — | 64 M2 | 23 |
6 | 26.4 | — | — | — | 64 V2 | 43 | 50 | 120 | 110 | 70 | — | — | 64 S2 | 47 |
3.2 | 14 | 67 L5 | 13 | 50 | — | — | — | 100 | 90 | 57 | 67 L5 | 16 | — | — |
5.0 | 22 | — | — | — | 71 L5 | 13 | 50 | 130 | 120 | 75 | — | — | 67 M5 | 25 |
6.3 | 28 | 67 S5 | 47 | 30 | — | — | — | 160 | 150 | 90 | 71 L5 | 16 | — | — |
8.5 | 37 | — | — | — | 72 L5 | 13 | 50 | 200 | 180 | 115 | — | — | 71 M5 | 25 |
10 | 44 | 71 S5 | 47 | 5 | 72 M5 | 19 | 5 | 250 | 230 | 140 | 72 L5 | 16 | — | — |
16 | 70 | 72 S5 | 47 | 5 | — | — | — | 340 | 320 | 200 | — | — | 72 M5 | 25 |
25 | 110 | — | — | — | 72 V5 | 63 | 5 | 500 | 470 | 290 | — | — | 72 S5 | 54 |
25 | 110 | — | — | — | 550 | 500 | 320 | 73 L8 | 30 | — | — | |||
40 | 176 | — | — | — | 850 | 800 | 500 | 74 L8 | 30 | — | — | |||
63 | 277 | — | — | — | 1400 | 1300 | 800 | 77 L8 | 30 | — | — | |||
100 | 440 | — | — | — | — | — | — | — | — | — | — | |||
130 | 572 | — | — | — | — | — | — | — | — | — | — |
3. Process Connection and Flow Table for Tube with PTFE Lining
Process Connections | Measuring range for water and liquids | Measuring range for air and gases | ||||||||||||||
EN Flange | ANSI Flange | Max. Flow | Float Combination | Pressure Loss | Viscosity | Max. Flow | Float Combination | Pressure Loss | ||||||||
PN16 | PN40 | L=C.C. | 150lbs | L=C.C. | 300lbs | L=C.C. | ||||||||||
D2 | D4 | mm | A1 | mm | A2 | mm | m3/h | gpm | Code | mbar | mpa*s | m3/h | m3/h I.N. | scfm | Code | mbar |
— | 250 | 250 | 3/4" 1" | 250 | 0.1 | 0.45 | 51 A1 | 16 | 50 | 3.5 | 3.3 | 2 | 51 A1 | 20 | ||
0.16 | 0.7 | 52 A1 | 16 | 50 | 5 | 4.7 | 2.9 | 52 A1 | 20 | |||||||
DN15 | 3/4" | 0.25 | 1.12 | 53 A1 | 16 | 50 | 8.5 | 8 | 5 | 53 A1 | 20 | |||||
DN25 | 1" | 0.4 | 1.8 | 54 A1 | 16 | 50 | 13 | 12 | 7.5 | 54 A1 | 20 | |||||
0.63 | 2.8 | 57 A1 | 16 | 50 | 20 | 18 | 11 | 57 A1 | 20 | |||||||
1 | 4.5 | 61 V1 | 18 | 50 | 34 | 32 | 20 | 61 V1 | 22 | |||||||
— | DN25 | 250 | 1-1/4" 1-1/2" | 250 | 1-1/4" 1-1/2" | 250 | 1.6 | 7 | 62 A2 | 20 | 30 | 50 | 47 | 29 | 62 A2 | 25 |
DN40 | 2.5 | 11.2 | 63 A2 | 20 | 10 | 85 | 80 | 50 | 63 A2 | 25 | ||||||
DN50 | 4 | 18 | 63 A2 | 22 | 50 | — | — | — | — | — | ||||||
— | DN50 DN65 DN80 | 250 | 2-1/2" 3" | 260 | 2-1/2" 3" | 270 | 4 | 18 | 64 A5 | 20 | 30 | 130 | 120 | 75 | 64 A5 | 25 |
6.3 | 28 | 67 A5 | 20 | 30 | 200 | 180 | 115 | 67 A5 | 25 | |||||||
10 | 45 | 71 A5 | 20 | 5 | 350 | 330 | 200 | 71 A5 | 25 | |||||||
16 | 70 | 71 V5 | 22 | 10 | — | — | — | — | — | |||||||
DN100 | 250 | 3-1/2" 4" | 270 | 3-1/2" 4" | 270 | 16 | 70 | 72 V8 | 25 | 10 | 500 | 470 | 290 | 72 V8 | 27 | |
DN80 | 25 | 110 | 73 V8 | 25 | 10 | 850 | 800 | 500 | 73 V8 | 27 | ||||||
40 | 180 | 74 V8 | 25 | 10 | — | — | — | — | — | |||||||
DN100 | DN100 | 250 | 4" | 270 | 4" | 270 | 63 | 280 | 77 10 | 30 | 10 | — | — | — | — | — |
4. Model selection of RAMC variable area flow meter
Model | Suffix Codes | Description | |||||
RAMC01 | Size DN15, 1/2" | ||||||
RAMC23 | Size DN20, 3/4" | ||||||
RAMC02 | Size DN25, 1" | ||||||
RAMC03 | Size DN32, 1-1/4" | ||||||
RAMC04 | Size DN40, 1-1/2" | ||||||
RAMC05 | Size DN50, 2" | ||||||
RAMC06 | Size DN65, 2-1/2" | ||||||
RAMC08 | Size DN80, 3" | ||||||
RAMC09 | Size 3-1/2" | ||||||
RAMC10 | Size DN100, 4" | ||||||
RAMC12 | Size DN125, 5" | ||||||
RAMC15 | Size DN150, 6" | ||||||
RAMCNN | Without measuring tube | ||||||
Process Connection | -D2 | EN flange PN 16, process connection dimension+ facing acc. EN 1092-1 Form B1 | |||||
-D4 | EN flange PN 40, process connection dimension+ facing acc. EN 1092-1 Form B1 | ||||||
-D5 | EN flange PN 63, process connection dimension+ facing acc. EN 1092-1 Form B1 | ||||||
-D6 | EN flange PN 100, process connection dimension+ facing acc. EN 1092-1 Form B1 | ||||||
-A1 | ASME flange class 150, process connection dimension + facing acc. ASME B 16.5 | ||||||
-A2 | ASME flange class 300, process connection dimension + facing acc. ASME B 16.5 | ||||||
-A3 | ASME flange class 600, process connection dimension + facing acc. ASME B 16.5 | ||||||
-T6 | NPT PN 40 female thread | ||||||
-G6 | G PN 40 female thread | ||||||
-R4 | Rp removable female thread | ||||||
-S2 | Thread acc. DIN 11851 | ||||||
-S4 | Tri- clamp PN 10, PN16 acc. DIN 32676 | ||||||
-T4 | NPT removable female thread | ||||||
-S5 | Flange Rosista PN 10 | ||||||
-NN | Without process connection | ||||||
Material of wetted parts | SS | Stainless steel | |||||
PF | Teflon lining | ||||||
NN | Without wetted parts | ||||||
Cone/ Float | -nnnn | As per flow table | |||||
-NNNN | Without measure tube and float | ||||||
Indicator/ Transmitter | -T | Indicator local | |||||
-E | Indicator electronic | ||||||
-G | Indicator electronic with Profibus PA | ||||||
-H | Indicator electronic with HART 5 | ||||||
-J | Indicator electronic with HART 7 | ||||||
-N | Without indicator | ||||||
Housing/ Type | 90 | Housing round blanc; SS | |||||
91 | Housing round yellow; Al | ||||||
NN | Without housing | ||||||
Power supply/ Output | 240 | 230 V AC; 4- wire; 0-20 mA | |||||
244 | 230 V AC; 4- wire; 4-20 mA | ||||||
140 | 115 V AC; 4- wire; 0-20 mA | ||||||
144 | 115 V AC; 4- wire; 4-20 mA | ||||||
430 | 24 V DC; 3- wire; 0-20 mA | ||||||
434 | 24 V DC; 3- wire; 4-20 mA | ||||||
424 | 24 V DC; 2- wire; 4-20 mA | ||||||
429 | Profibus PA; 9...32 V DC | ||||||
NNN | Without power supply | ||||||
Optional codes | /Optional codes |
5. Mounting C to C Dimension
Process Connection Diameter | Flanged Process Connection Dimension " L " (mm / inches) | NPT Process Connection Dimension " L " (mm / inches) |
1/2" | 250/9.8 | 295 /11.6 |
3/4" | 250/9.8 | 295 /11.6 |
1" | 250/9.8 | 295 /11.6 |
1 1/4" | 250/9.8 | 295 /11.6 |
1 1/2" | 250/9.8 | 295 /11.6 |
2" | 250/9.8 | 310 / 12.2 |
2 1/2" | 250/9.8 | 325/ 12.7 |
3" | 250/9.8 | 325/ 12.7 |
3 1/2" | 250/9.8 | N/A |
4" | 250/9.8 | N/A |
5" | 250/9.8 | N/A |
6" | 260/10.2 | N/A |
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