RATOSIGHT™ FLOW RATE INDICATOR with OPTlONAL RATOLARM ™
The Bailey-Fischer & Porter Series 1CA2235A Ratosight
flow rate indicator is a rugged, low cost, glass tube, variable area flowmeter that
provides stable and reliable operation while measuring liquid or gas flow rates. This
indicator can be supplied with Ratolarm extension (Series
10A2235-OA) for alarm actuation. The alarm unit can house one or two vibration-proof
magnetic switches with relays. Each switch is fully adjustable over the entire operating
range of the flowmeter.
To provide fail-safe operation, the Ratolarm relay is wired so
that its coil is energized during normal flow. Upon power failure, the relay coil is
deenergized causing the relay contacts to assume the alarm position. These relay contacts
may be wired for normally open or normally closed alarm action or both, simply through
connection to appropriate posts on the terminal strip. Typical applications include the
automatic shut-down of heavy equipment when bearing lubricant flow becomes too low, the
shut-down of electrical equipment when cooling water flow falls below a preset limit, or
the actuation of auxiliary equipment such as pump motor starters or solenoid valves. |
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ENGINEERING
SPECIFICATIONS
TABLE I. PERFORMANCE |
Connection Pipe Size |
Safe Working Press |
Approx. Scale Length |
Repro-
ducibility % Full Scale |
Std. Accuracy % Full Scale |
Opt. Accuracy w/calib. % Full Scale |
psig |
kPa |
inches |
mm |
1/2" NPT |
175 |
1206 |
1-1/2 |
38 |
± 2% |
± 10% |
± 5% |
1" NPT |
125 |
861 |
2-1/2 |
63 |
± 2% |
± 5% |
± 3% |
1-1/2" NPT |
100 |
689 |
3-1/2 |
90 |
± 2% |
± 5% |
± 3% |
| 2" NPT |
75 |
517 |
4 |
100 |
± 2% |
± 5% |
± 3% |
Maximum Temperature Rating 2500F, (121 0Q)
Minimum Recommended Temperature 320F (00C)
Connections: Threaded NPTI
Materials of Construction:
Metering Tube: Borosilicate glass
Float: Standard - brass for liquids, aluminum for gases; stainless steel
float extension is used on alarm units for liquids and gases. Optional - Monel float for
liquids only.
Body: 85-5-5-5 bronze
0-rings: Standard, Buna N; optional, Viton A.
Alarm Extension Well: 316 stainless steel
Alarm Base and Housing: Standard, weather tight aluminum.
Scale: Etched directly on tube in either gpm water or scfm air at 14.7
psia and 70 F (101 kPa & 21 C). Other scales optionally available.
Mounting & Piping: Indicator can be mounted in horizontal or vertical
piping runs using any of the four arrangements shown below. Horizontal standard - other
arrangements optional.
TABLE
II. CAPACITIES
Flow Rate Indicator - 10A2235A |
Connection Pipe Size |
gpm *
Water |
scfm ** Air
at 14.7 psia
and 70 F |
min. |
max. |
H2OdeltaP(1) |
Model
No. (2) |
min. |
max. |
H2OdeltaP(1) |
Model
No. (2) |
| in |
mm |
in |
mm |
1/2"
NPT |
0.02 |
0.36 |
6.5 |
165 |
B |
0.05 |
0.60 |
1.4 |
36 |
B |
0.05 |
0.60 |
17.0 |
432 |
C |
0.10 |
1.3 |
4.6 |
117 |
C |
0.10 |
1.00 |
7.0 |
178 |
D |
0.20 |
2.0 |
1.4 |
36 |
D |
0.20 |
2.00 |
21.0 |
533 |
F |
0.50 |
4.5 |
5.5 |
140 |
F |
0.40 |
3.00 |
34.0 |
864 |
C |
0.50 |
7.0 |
10.0 |
254 |
C |
0.60 |
4.00 |
59.0 |
1499 |
H |
1.5 |
9.0 |
14.5 |
368 |
K |
1"
NPT |
0.50 |
6.00 |
13.0 |
330 |
J |
1.0 |
14.0 |
4.5 |
114 |
L |
0.50 |
8.00 |
21.0 |
533 |
K |
2.0 |
20.0 |
8.0 |
203 |
N |
1.0 |
11.00 |
35.0 |
889 |
L |
2.0 |
26.0 |
13.0 |
330 |
P |
1-1/2"
NPT |
1.0 |
15.00 |
18.0 |
457 |
M |
4.0 |
36.0 |
8.5 |
216 |
Q |
2.0 |
20.00 |
29.0 |
737 |
N |
5.0 |
50.0 |
12.0 |
305 |
R |
2.0 |
24.00 |
44.0 |
1118 |
P |
5.0 |
60.0 |
19.0 |
483 |
S |
| 2" NPT |
3.0 |
35.00 |
22.0 |
559 |
Q |
8.0 |
80.0 |
8.0 |
203.0 |
T |
4.0 |
50.00 |
45.0 |
1143 |
R |
10.0 |
110.0 |
15.0 |
381.0 |
U |
NOTE: (1) delta P values in above
table are maximum pressure drops using horizontal connections. When
vertical con-
nections are used, the pressure losses are approximately 25% lower.
(2) Use this code to complete model number.
WARNING
All gas applications at pressures exceeding 50 psig and all flashing liquid applications
should be handled by using either all metal meters or glass tube meters with an externally
installed operator protection shield. This precaution is recommended because of the danger
of accidental breakage of the glass tube under pressure.
TABLE
III. FLOW RATE INDICATOR WITH ALARM
10A2235A -- OA |
Connection Pipe Size |
gpm *
Water |
scfm ** Air
at 14.7 psia
and 70 F |
min. |
max. |
H2OdeltaP(1) |
Model
No. (2) |
min. |
max. |
H2OdeltaP(1) |
Model
No. (2) |
| in |
mm |
in |
mm |
1/2"
NPT |
0.1 |
1.3 |
7.5 |
191 |
E |
0.5 |
5.5 |
7.5 |
191 |
F |
0.2 |
2.0 |
16.0 |
406 |
F |
0.5 |
8.5 |
16.0 |
406 |
H |
0.6 |
4.0 |
59.0 |
1499 |
H |
1.0 |
9.0 |
59.0 |
1499 |
J |
1"
NPT |
0.50 |
6.00 |
13.0 |
330 |
J |
1.0 |
14.0 |
13.0 |
330 |
L |
0.50 |
8.00 |
21.0 |
533 |
K |
2.0 |
19.0 |
21.0 |
533 |
M |
1.0 |
11.00 |
35.0 |
889 |
L |
2.0 |
26.0 |
35.0 |
889 |
P |
1-1/2"
NPT |
1.0 |
15.00 |
22.0 |
559 |
M |
4.0 |
36.0 |
8.5 |
216 |
Q |
2.0 |
20.00 |
29.0 |
737 |
N |
5.0 |
50.0 |
12.0 |
305 |
R |
2.0 |
24.00 |
44.0 |
1118 |
P |
5.0 |
60.0 |
19.0 |
483 |
S |
| 2" NPT |
3.0 |
35.00 |
22.0 |
559 |
Q |
8.0 |
80.0 |
8.0 |
203.0 |
T |
4.0 |
50.00 |
45.0 |
1143 |
R |
10.0 |
110.0 |
15.0 |
381.0 |
U |
(1), (2) see above.
*gpM x 3.785 = Liters per minute or L/min.
**scfm x 0.0284 = cubic meters per minute or M3/min.
TABLE
IV. WEIGHTS |
Connection
Pipe Size |
10A2235 |
10A2235A-OA |
pound |
kilogram |
pound |
kilogram |
1/2' |
4 |
1.8 |
7 |
3.2 |
1" |
9 |
4 |
12 |
5.40 |
1-1/2" |
14 |
6 |
19 |
8.50 |
2" |
30 |
13.5 |
35 |
16.0 |
ACCESSORIES
Special indicating scale
High voltage relay
Double pole, double throw relay
Hermetically sealed relay
Accessory Alarm & Relay Specifications
Relays (Maximum of two per meter)
Standard - Dustproof Construction
Optional - Hermetically sealed
Relay Switch Action
Standard - Single pole, double throw
Optional - Double pole, double throw
(requires special relay base)
Relay Holding Coil Voltage
Standard - 120V ac, 50/60 Hz
Optional - 240V ac, 50/60 Hz;
24, 48, 120 or 240V dc.
Relay Contact Rating (Resistive Load)
Standard: 120V ac, 50/60 Hz, 10A (SPDI switch), 5A (DPDI switch)
Optional: 240V ac 50/60 Hz, 5A (SPDT switch),
2.5A (DPDT switch). 120V dc 0.5A (SPDI switch),
0.25A (DPDT switch). 240V dc 0.25A (SPDT switch),
0.12A (DPDT switch).
For other ratings or inductive load relay contact rating, consult Bailey-Fischer &
Porter.
Alarm Switch Contact Rating
Applicable only when relay is omitted (resistive load)
15 VA, lA (Max), 250V (Max) (ac or dc). Arc
suppression should be used on inductive loads.
Alarm Switch Differential (Fixed)
Maximum 8% of full scale
Electrical Consumption
1-1/2 to 2W per alarm
Safety Classification
The alarm, with a hermetically sealed relay is non-incendive for Class I, Division 2,
Groups A, B, C & D.
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