Omega Products FL-1342-G User Manual
VARIABLE AREA ROTAMETERS
9.7 (0.38) maximum
panel thickness
15
(0.59)
15
(0.59)
Drill two 0.59" holes to fit
inlet and outlet. Max. panel
thickness is 3⁄8". Use the two
retaining nuts supplied
to secure flowmeter.
25
(1)
open
25
(1)
16
(0.63)
13
(0.5)
224
(8.81)
114
(4.5)
Center
Line
9.7 (0.38) maximum
panel thickness
15
(0.59)
15
(0.59)
With 65 mm and 150 mm Scales
FL-1341-G
OMEGA® precision variable area
rotameters can measure flows of air,
water, and gases, with up to ±5% of
full scale accuracy and 0.25% of full
scale repeatability. These units
feature an easy-to-read millimeter
scale and are supplied with
correlation charts for air and water.
Correlation data for other gases are
also available. Please consult the
OMEGA Flow Engineering
Department for details. The scale is
fused on the metering tube in 1 mm
increments, which enables the user
to read the flow rate with the
highest accuracy.
Shielded For
Pressurized Systems
These rotameters, have heavy
wall, precision-bored borosilicate
glass metering tubes and are fully
shielded against breakage, with end
fittings of brass or stainless steel
and aluminum side plates. In front, a
clear plastic shield keeps the scale
clean and easy-to-read, while an
opaque white rear shield provides a
background to aid in discerning the
float position for accurate readings.
Panel Mounting Design
These rotameters are equipped with
horizontal ports with NPT threads for
easy panel mounting. The ports have
external threads and are equipped
with panel retaining nuts. No
additional mounting hardware is
required. Simply drill two holes
114.3 mm (4.5") apart (center to
center) for 65 mm units or 223.8 mm
13
(8
⁄16") apart (center to center) for
150 mm units. Each hole should be
14.9 mm (0.59") in diameter.
Non-Rising Stem
Needle Valve
The 150 mm size flowmeters are
also available with non-rising stem
type needle valves for special
applications. This 15-turn metering
valve has superior flow rate control
and is particularly well suited for use
in chromatography applications. The
sliding tapered needle mechanism
virtually eliminates sticking or buildup
due to foreign matter in the fluid
stream, without variations or
sawtoothing of the flow rate.
Compact 65 mm Scale
These compact units feature ±10%
of full scale accuracy and ±
full scale repeatability. They are
ideal for applications involving
purging, seal oil systems, bearing
lubrication, and cooling water flow
indication.
1
⁄2% of
Easy-To-Read
150 mm Scale
OMEGA’s larger units feature 5%
accuracy and
The scale has more divisions for
higher accuracy, is easier to read,
and causes less eye fatigue.
1
⁄4% repeatability.
Applications
Variable area rotameters can be
used in many applications, including
industrial and laboratory situations.
Some common uses include carrier
gas flow and fuel flow in chromatography and coolant flow indication.
Flow Control
Control the flow rate with the
standard built-in control valve.
Also available, as an option, is an
integral flow controller. In addition,
150 mm scale units are available
with the unique non-rising stem type
needle valve.
Wetted Parts
Standard floats are 316 stainless
steel, glass, and carboloy. Other
wetted parts include the glass
mtering tube, PTFE float stops,
brass, aluminum or 316 SS end
fittings, and Buna (with brass or
aluminum construction) or FKM-A
(with 316 SS construction) O-rings.
Ratings And Specifications
The maximum operating
pressure is 13.8 bar (200 psig),
at temperatures up to 121ºC
(250ºF). The minimum flow rate at
the rated accuracy is 10% of the
maximum flow rate. All connections
1
are
⁄8" female NPT threaded.
Panel-mount display
Center
Line
114
(4.5)
224
(8.81)
Dimensions show
flowmeter side view.
Face width (not shown)
is 1¼". Use center line
dimensions for drilling panel.
B-29
25
(1)
open
25
16
(1)
(0.63)
(0.5)
13
FL-1341-S shown
smaller than actual size.
15
(0.59)
Drill two 0.59" holes to fit
inlet and outlet. Max. panel
thickness is 3⁄8". Use the two
retaining nuts supplied
to secure flowmeter.
15
(0.59)
9.7 (0.38) maximum
panel thickness
Dimensions:
mm (inch)
Rotameters with 65 mm Scale Flowtubes1 (with 6-turn valve)
To Order Visit omega.com/fl1340_1440 for Pricing and Details
Aluminum Frame Brass Frame 316 SS Frame Max Flowrate
Air Water Float
Model No. Model No. Model No. cc/min cc/min Material
FL-1341-G FL-1351-G FL-1361-G 56.6 0.70 Glass
FL-1341-S FL-1351-S FL-1361-S 150 3.00 316SS
FL-1342-G FL-1352-G FL-1362-G 66.6 0.80 Glass
FL-1342-S FL-1352-S FL-1362-S 183.3 3.67 316SS
FL-1343-G FL-1353-G FL-1363-G 400 7.00 Glass
FL-1343-S FL-1353-S FL-1363-S 833.3 23.3 316SS
FL-1344-G FL-1354-G FL-1364-G 1666 40.0 Glass
FL-1344-S FL-1354-S FL-1364-S 3333 100 316SS
FL-1345-G FL-1355-G FL-1365-G 5666 142 Glass
FL-1345-S FL-1355-S FL-1365-S 10,833 333 316SS
FL-1346-G FL-1356-G FL-1366-G 18,333 500 Glass
FL-1346-S FL-1356-S FL-1366-S 38,000 1166 316SS
FL-1347-C FL-1357-C FL-1367-C 56,666 1666
2
Carboloy
B
FL-1442-G shown
smaller than actual size.
Comes with operator’s manual and
correlation tables for water and air.
Note: “-G” suffix denotes glass float;
“-S” suffix denotes 316 SS float;
“-C” suffix denotes carboloy float.
1. Low-cost units with PVDF construction
also available. Visit omega.com/
fl1700 or omega.com/fl1800
2. Minimum flow rate is 10% of the
maximum rate shown.
3. Low-cost, stainless steel construction
unit with 65 mm glass tube also
available. Visit omega.com/fl1900
Rotameters with 150 mm Scale Flowtubes
Aluminum Frame Brass Frame 316 SS Frame Max Flowrate
1, 3
(with 6-turn valve)
2
Air Water Float
Model No. Model No. Model No. cc/min cc/min Material
FL-1442-G FL-1452-G FL-1462-G 96 1.11 Glass
FL-1442-S FL-1452-S FL-1462-S 265 4.93 316SS
FL-1443-G FL-1453-G FL-1463-G 370 5.75 Glass
FL-1443-S FL-1453-S FL-1463-S 820 20.6 316SS
FL-1444-G FL-1454-G FL-1464-G 820 16.6 Glass
FL-1444-S FL-1454-S FL-1464-S 1680 46.2 316SS
FL-1445-G FL-1455-G FL-1465-G 2350 52.8 Glass
FL-1445-S FL-1455-S FL-1465-S 4600 133 316SS
FL-1446-G FL-1456-G FL-1466-G 3800 84.6 Glass
FL-1446-S FL-1456-S FL-1466-S 7600 218 316SS
FL-1447-G FL-1457-G FL-1467-G 8600 200 Glass
FL-1447-S FL-1457-S FL-1467-S 16,400 493 316SS
FL-1448-G FL-1458-G FL-1468-G 23,500 573 Glass
FL-1448-S FL-1458-S FL-1468-S 43,000 1350 316SS
FL-1448-C FL-1458-C FL-1468-C 60,000 2120
Carboloy
Rotameters with 150 mm Scale Flowtubes1 (with 15-turn valve)
Aluminum Frame Brass Frame 316 SS Frame Max Flowrate
Air Water Float
Model No. Model No. Model No. cc/min cc/min Material
FL-1472-G FL-1482-G FL-1492-G 96 1.11 Glass
FL-1472-S FL-1482-S FL-1492-S 265 4.93 316SS
FL-1473-G FL-1483-G FL-1493-G 370 5.75 Glass
FL-1473-S FL-1483-S FL-1493-S 820 20.6 316SS
FL-1474-G FL-1484-G FL-1494-G 820 16.6 Glass
FL-1474-S FL-1484-S FL-1494-S 1680 46.2 316SS
FL-1475-G FL-1485-G FL-1495-G 2350 52.8 Glass
FL-1475-S FL-1485-S FL-1495-S 4600 133 316SS
FL-1476-G FL-1486-G FL-1496-G 3800 84.6 Glass
FL-1476-S FL-1486-S FL-1496-S 7600 218 316SS
FL-1477-G FL-1487-G FL-1497-G 8600 200 Glass
FL-1477-S FL-1487-S FL-1497-S 16,400 493 316SS
FL-1478-G FL-1488-G FL-1498-G 23,500 573 Glass
FL-1478-S FL-1488-S FL-1498-S 43,000 1350 316SS
FL-1478-C FL-1488-C FL-1498-C 60,000 2120
2
Carboloy
B-30
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