manas
R
a name that spells trust....
AN ISO 9001: 2008 COMPANY
We Measure Flow
SERIES: MEGA SROAT AND SROAT 1000A / 1000 A+
INTRODUCTION :
Series MEGA SROAT is offering large sized electromagnetic
flow meters introduced by manas. The sizing ranges from
400mm diameter to 1600mm diameter. These flow meters are
very accurate(Typically 0.5% of actual flow rate). Hard ebonite
rubber lining makes these meters suitable for measurement of
Raw Water containing even abrasive sand and quartz particles,
mud etc. and still delivering long life. This Series is also suitable
for sewage applications.
l
l
l
l
Measurement independent of un-dissolved solids.
Long lasting Ebonite rubber lining gives long life of sensor.
End connection flanges as per customer's Requirements.
Much better accuracy compared to other types of meters
in its class.
APPLICATIONS :
1)Extremely useful for large water supply schemes.
2) Suitable for Sewage measurements
PRINCIPLE OF OPERATION:
3) Municipal water measurement schemes.
The MEGA SROAT series of electromagnetic flow meters work
on FARADAY'S LAW OF ELECTROMAGNETIC INDUCTION. It,
in brief, states; “When a conductor moves within a magnetic
field , voltage is induced in it which is proportional to the
velocity of conductor”
TECHNICAL SPECIFICATIONS:
In this case the conductor is flowing media. The equation is as
below:
E= B.v.d
Where
E = Induced voltage [proportional to velocity]
B = Magnetic flux density
v = Mean velocity of the media
d = Diameter of flow-sensor(distance between the sensing
electrodes)
For a given size of flow tube & compatible amplifier the flux
density 'B' is constant, the distance between the electrodes is
constant. Hence, the induced voltage is proportional to the
flowing media. Thus the meter can be calibrated in terms of
volumetric flow rate by knowing the cross-sectional area of the
tube.
PRINCIPAL ADVANTAGES:
l Robust, rugged, welded steel/stainless steel construction
withstanding to IP68.
l Very much suitable for submerged or buried application.
l No Pressure Drop across the sensor, being full bore
construction.
A ) PRIMARY FLOW SENSOR : - Mega Sroat
1. Meter Size
:
DN 400 to DN 1600
2. Media Pressure
:
PN 10
3. Media Temperature:
0-80°C max
4. Operating Ambient :
Temperature
0 - 60 °C
5. Material of construction
Pipe
Electrodes
Liner
Flanges
Coil Housing
:
:
:
:
:
:
:
Earth Electrodes
:
Body Material
6. Flange Standard
:
:
7. Power Supply to
Field Coils
:
SS 304 [ non magnetic ]
SS 316/SS 316L/ or others as
per compatibility with service
liquid.
Hard Ebonite rubber
CS / SS 316 / SS 304 / SS 316 L
CS (Polyurethene
Painted ) / SS304/ SS 316
SS 316/SS 316L / Hastalloy C /
or others
CS / SS 316 / SS 304
ANSI /BS/AWWA/Any other as
per customer's Specs.
Pulsed DC
ERROR DIAGRAM
% ERROR OF ACTUAL FLOW
2.5
2.0
1.5
1.0
0.5
0
- 0.5
- 1.0
- 1.5
- 2.0
- 2.5
0
10
20
30
40
50
60
FLOW AS PERCENTAGE OF RANGE
70
80
90
100
TRANSMITTER SROAT 1000A PLUS / SROAT 1000A
TRANSMITTER : SROAT 1000 A plus
Common Specs. to both transmitters :
1
Display(Optional)
2
Pulse Output
3
Comm. Port
4
Data Logging
1. Type
: Integral mounted [std.]
Remote Mounted
[on request]
2. Min. Media Conductivity : ? 5 µs /cm [ for lower
conductivities consult
factory]
3. Flow Velocity Range
: 0.1 m/s to 10 m/s
4. Accuracy
: ±0.5% of reading [at ref.
conditions] between
100% to 10% of
calibrated range.
±0.75% of reading for
flow rate between 10 to
5% [refer accuracy graph]
6. Ref. Conditions
: Power supply nominal.
Temperature 27°c ± 2°c
7. Repeatability
: ±0.2% of reading
8. Ambient Temperature
: 0 - 50°c
9. Temperature Drift
: ±0.015% per °C max.
10. Humidity
: 90 % R. H. max. non
condensing
11.Material of Housing
: Al. Die cast.
12. Power Supply
13. Damping
14. Cable Entries
15. Ingress Protection
: 230 V ac/ 110 V ac
50 Hz/24 Vdc.
: Adjustable from 5 to 30 Secs.
: 4 no. For remote amplifier
2 no. For integral amplifier
½” NPT / ½” BSP/
PG11[Female]
: IP-65
FLOW RATE TABLE :
DN
400
450
500
600
700
750
m3/Hr.
452.389
572.555
706.858
1017.875
1385.441
1590.430
LPM
7539.816
9542.580
11780.960
16964.59 0
23090.69 0
26507.17 0
: 16 Character x 2line LCD for
instantaneous flow rate and
cumulative flow.
: 1 pulse per hour to 100,000
pulses \ hour,
(Open collector 3 Wire),
programmable.
: RS 232 or RS 485 with
MODBUS RTU compatible to
serial printer.
: Up to 5000 readings can be
stored on real time base.
These readings can be
viewed latter using a
keyboard or may be
printed.
TRANSMITTER : SROAT 1000 A
1. Signal Output
: 4-20 mA dc isolated in max.
600 ohms
2. Coil Excitation Frequency : 12.5Hz/6.25 Hz
3. Local Display
: a) 3 ½ digit LCD calibrated
in % or engineering units
for flow rate indication
b) 8 digit LCD non
resettable type for totalised
quantity.
Flow rate at v = 1m/s
LPS
125.664
159.043
196.349
282.743
384.845
441.786
MLD
10.8
13.7
16.9
24.4
33.2
38.1
DN
800
900
1000
1200
1400
1600
m3/Hr.
1809.556
2290.219
2827.431
4071.501
5541.765
7238.223
LPM
30159.26
38170.32
47123.85
67858.34
92362.75
120637.1
LPS
502.654
636.172
785.398
1130.972
1539.379
2010.618
MLD
43.429
54.965
67.858
97.716
133.002
173.717
Sample Calculation for Velocity in flow Tube :
Pl. Refer the velocity Table where flow rates at 1 meter/sec. velocity through different sizes of flow meter are given. In general
through large size of meters the velocity taken is between 2 to 3 m/sec.
Given flow rate by customer :3000 m3/hr. (Say)
Expected Velocity through Flow meter : 2.5 m/sec.(Approximately)
Flow rate at 1 meter/sec. velocity : 3000/2.5=1200 m3/hr.
Referring Velocity table, DN700 is having 1385.441 m3/hr. flow rate at 1 m/sec. velocity.
We get velocity for given flow rate through DN700 : 3000/1385.441=2.165 m/sec.
This is suitable velocity. Thus in this case DN700 is suitable meter.
Alternately, Suppose the given line size is 800 NB. Flow rate is 3000 m3/Hr. Velocity through DN 800 flow meter,
V=3000m3/hr./1809.556 =1.658 m/s. Where, 1809.556 is the flow rate in m3/hr., specified for 1 meter velocity through DN800
meter as per the above velocity table.
ORDERING INFORMATION
Table for Meter Dimensions MEGA-SROAT(mm)
DN(mm)
A
B
C
400
600
325
600
450
635
415
650
500
700
500
700
600
810
550
800
700
850
700
900
750
910
750
950
800
1000
800
1000
900
1085
800
1100
1000
1200
800
1200
1200
1410
900
1400
1400
1600
1000
1400
1600
1840
1100
1600
FLOW METER SIZE
DN 400 : 16”
DN 450 : 18”
DN 500 : 20”
DN 600 : 24”
DN 700 : 28”
DN 750 : 30”
DN 800
DN 900
DN 1000
DN 1200
DN 1400
DN 1600
:
:
:
:
:
:
32”
36”
40”
48”
56”
64”
LINER MATERIAL
LN-01 : Hard Rubber
LN-02 : Soft Rubber
LN-03 : Neoprene Rubber
ELECTRODE MATERIAL
EL-01 : SS316
EL-02 : SS316L
EL-03 : HASTELLOY 'C
Note 1. All dimensions are in mm.
2. Dimension ‘C’ is without earth rings.
3. Dimensions are with terminal box.
FLANGE /END CONNECTION STANDARDS
FCS-01 : AWWA : CLASS D
FCS-02 : ANSI
: CLASS 150
FCS-03 :BS-10
: TABLE F-UPTO DN 600
FCS-04
: ANY OTHER
110
FLANGE
FM -01 :
FM-02 :
FM-03 :
57
56
MATERIAL
Carbon Steel
Mild Steel
Any Other
BODY MATERIAL
BM-01 : Mild Steel
BM-02 : SS304
BM-03 : SS316
BM-04 : SS316L
A
FLOW TRANSMITTER TYPE
FTT- 01 : Blind
FTT- 02 : With Display
B
C
FLOW TRANSMITTER MOUTING
FT-01 : Integral
FT-02 : Remote (wall)
75
Crownsp @ vsnl.com feb 2009-1000
POWER SUPPLY
01 : 110 VAC ± 10%, 50 Hz
02 : 230 VAC ± 10%, 50Hz
DN 600
LN 02
EL 03
FCS 01 FM 01 BM 01 FTT02
Manufactured By
R
FT02
02
Authorised Distributor