Omega Products FL4201-V User Manual
OEM-STYLE ACRYLIC ROTAMETERS
Capacities: Water: 6.5 GPH to 20 GPM
Air: 2 SCFH to 40 SCFM
FL4000 Series
††
Optional
FL4304, shown
U 50, 75, 127, and 250 mm
(1.97, 2.96, 5, and 9.85")
Scale Lengths
U Floats are Rod-Guided
in Most Models
U Metering Valves Available
U Rear Inserts Provided
for Panel Mounting
U Direct-Reading Scales
actual size.
FL4000 OEM-style rotameters
are precisely machined from solid
acrylic blocks. They are available
in 50, 75, 127, and 250 mm
(1.97, 2.96, 5, and 9.85") scale
lengths and have accuracies
between 2 and 6%. Designed for
front-panel mounting, the rear ports
extend through the panel for easy
hookup. Mounting threads are also
provided. Units are available with
and without valves.
SPECIFICATIONS
Construction: Acrylic tube, 316 SS float
and guide rod (no guide rod for FL4211
through FL4215 air meters), PVC end
fittings (brass on FL4200 Series),
EPR O-rings, optional brass valve
Max Pressure/Temperature:
Water Ranges:
125 psig @ 21°C (70°F);
54°C (130°F) at 0 psig
Air Ranges:
100 psig @ 21°C (70°F);
38°C (100°F) @ 0 psig
Full Scale Accuracy/Repeatability:
FL4200: 6/2%
FL4300 and FL4400: 4/1%
FL4500: 3/1⁄2%
FL4600: 2/1⁄2%
FL4212-V, with
optional valve,
shown actual size.
FL4503-V,
shown actual size.
B-17a
Dimensional
L
H
J
Drawing
Many fittings of various materials
c
J
and styles are available.
Visit omega.com
D
F
(FULL OPEN)
B
3.5
3.0
2.5
H
F
2.0
1.5
1.0
.5
C
REAR VIEW
GPM-LIQUID-Sp. Gr. 1.0-READ TOP OF FLOAT
A
D
(FULL OPEN)
G
E
G
E
L
J
Connection: FL4200: ¹⁄₄ FNPT; FL4300
and FL-4500: ¹⁄₄ FNPT x ¹⁄₂ MNPT; FL4400:
1 MNPT; FL4600: ¹⁄₂ FNPT
Dimensions mm (in) FL4200 FL4300 FL4400 FL4500 FL4600
A 102 (4.0) 168 (6.6) 225 (8.9) 210 (8¹⁄₄) 362 (14¹⁄₄)
B 25 (1.0) 32 (1.3) 44 (1.8) 32 (1¹⁄₄) 44 (1³⁄₄)
C 32 (1.3) 35 (1.4) 46 (1.9) 35 (1³⁄₈) 46 (1¹³⁄₁₆)
D 105 (4.1) 173 (6.8) 232 (9.9) 213 (8³⁄₈) 368 (14¹⁄₂)
E 13 (0.5) 25 (1.0) 32 (1.3) 25 (1) 19 (³⁄₄)
F 29 (1.1) 32 (1.3) 48 (1.9) 32 (1¹⁄₄) 48 (1⁷⁄₈)
G 76 (3.0) 127 (5.0) 165 (6.5) 164 (6⁷⁄₁₆) 311 (12¹⁄₄)
H — 76 (3.0) 102 (4.0) 100 (3¹⁵⁄₁₆) 222 (8³⁄₄)
L 17 (0.7) 25 (1.0) 35 (1.4) 25 (1) 32 (1¹⁄₄)
J Mounting † ¹⁄₄ x 20 ¹⁄₄ x 20 ¹⁄₄ x 20 ³⁄₈ x 24
Thread Size*
Threaded stud.
*
†
FL4200 has 7⁄8" hex lock nuts around ports; requires 3⁄4" holes to be drilled through the panel.
To Order Visit omega.com/fl4200_4600 for Pricing and Details
Water Air
Range
Model No. (Max)* No Valve Valve Model No. (Max)*
FL4201 7 GPH 1** 1.3** FL4211 2.6 SCFH
FL4202 12 GPH 15** 17** FL4212 5.0 SCFH
FL4203 22 GPH 35** 51** FL4213 10.0 SCFH
FL4204 44 GPH 149** 200** FL4214 20.0 SCFH
FL4205 60 GPH 100** 250** FL4215 30.0 SCFH
FL4301 1 GPM 18** 26** FL4216 60.0 SCFH
FL4302 2.0 GPM 70** 125** FL4217 100.0 SCFH
FL4303 3.5 GPM 200** 290** FL4218 180.0 SCFH
FL4304 5 GPM 290** 440** FL4219 4.0 SCFM
FL4401 10 GPM 53 220 FL4411 40.0 SCFM
FL4402 15 GPM 132 330 FL4412 62.0 SCFM
FL4403 20 GPM 200 400 — —
FL4501 1 GPM 18 33 FL4511 4.0 SCFM
FL4502 100 GPH 45 75 FL4512 6.8 SCFM
FL4503 2 GPM 70 155 FL4513 8.0 SCFM
FL4504 5 GPM 240 400 FL4514 20.0 SCFM
FL4601 2 GPM 5 21 FL4611 8.5 SCFM
FL4602 3.5 GPM 13 50 FL4612 14.5 SCFM
FL4603 5 GPM 20 95 FL4613 20.0 SCFM
FL4604 10 GPM 110 270 FL4614 40.0 SCFM
Comes complete with operator’s manual.
Minimum flow rate = 10% of maximum flow rate listed.
*
For water ranges. For air ranges, contact the Flow Department. For units with brass valve,
**
add suffix “-V” to model number, additional cost for FL4200s, FL4300s, FL4400s, FL4500s
and FL4600s.
††
For NIST calibration certificate, and “-NIST 5PT” to the model number for 5-point calibration,
or “-NIST 10PT” for 10-point calibration for additional cost.
Ordering Examples: FL4303-V, acrylic rotameter, 3.5 GPM flow rate.
FL-4613, acrylic rotameter, 40 SCFM max flow.
B-17b
Pressure Drop,
inH
O**
2
Range
B1
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