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Orange Research 2200, 2300 & 2400 Series Variable-Area Flow for Liquids or Gases

Variable-Area Flow for Liquids or Gases
2200, 2300 & 2400 Series

Our variable-area flowmeters are designed for liquid or gas applications where rotameters often fall short. These models have large dials with bold markings and characters that are easy to read from a distance. They also handle high line pressures and can be mounted in any orientation.

Like rotameters, they are mounted directly in the flow stream, but with bodies machined from solid blocks of metal, they handle high-pressure applications of up to 5000 psi (vs 150 psi for rotameters). This makes them a natural for hydraulic systems. The variable-area sensor, a movable Delrin cone (2200 &2300) or Teflon cone (2400), rests in a precision orifice.

Fluid flow causes the sensor to move from the orifice and against a stainless steel spring while the flow rate is indicated on an easy-to-read dial face.

We offer them with pressure bodies (and wetted parts) of aluminum, stainless steel or brass. A variety of dial sizes are available, from 2.5 inch to 4.5 inch.

Choose from a wide selection of dial, porting, seal and calibration options. Switches, relays and transmitters are available with the dial or as stand-alone instruments. More details on these models can be found on our flow introduction pages 16-19. Electrical details are on pages 26-27.

• Large, easy-to-read dial
• Rugged, high line pressure design
• Vertical or horizontal mounting

Select a link under the "item" tab below to order.

Table 1Table 2Table 3Table 4Table 5Table 6Table 7
XXXXXXXXXXXXXXXX
Table 1Models
2221FG2221FG
2221FGS2221FGS
2221FS2221FS
2223FGS2223FGS
2223FS2223FS
2321FG2321FG
2321FGS2321FGS
2321FS2321FS
2323FGS2323FGS
2323FS2323FS
Table 2Flow Body
1Aaluminum
1C316 SS
1Ebrass
Table 3Dial Case
2.5B2.5” basic
3.5B3.5” basic
4.5B4.5” basic
Table 4Electrical
ASPST, N.O.
BSPST, N.C.
CSPDT
A-A2 ea. -A
B-B2 ea. -B
C-C2 ea. -C
R2relay
T2transmitter
Table 5Calibration
Wstd. calibr. -water
Ostd. calibr. -oil
Astd. calibr. -air
Sspecial calibr.*
Table 6Options
5plastic lens
6liquid fill (glycerine)
8reverse flow
9vertical flow (specify direction – up or downward)
Table 7Special Seals (Buna-N standard):
TTeflon
VViton
Model Flow range Porting

Max. line press./temp.

Accuracy (F.S.)/
repeatability
Turndown* Electrical Available
2221FG/FGS/FS

Liquids
0-1 to 0-5 GPM
(0-4 to 0-18 LPM)
Air & Gas
1.5-10 to 3-25 SCFM
(40-280 to 75-700 SLPM)

1/4”NPT 3000 psig
(200 bar)
200ºF (93ºC)
Liquids
2%/1%
Air & Gas
5%/1%
10:1 1 or 2 switches >
2223FGS/FS/FGT/FT Liquids
0-1 to 0-5 GPM (0-4 to 0-18 LPM)
Air & Gas
1.5-10 to 3-25 SCFM (40-280 to 75-700 SLPM)
1/4”NPT 5000 psig
(200 bar)
200ºF (93ºC)
Liquids:2%/1%
Air & Gas:5%/1%
10:1

1 or 2 switches
1 relay
 transmitter
NEMA 4X
Class 1-Div.2 

2321FG/FGS/FS Liquids
0-1 to 0-5 GPM (0-4 to 0-18 LPM)
Air & Gas
4-30 to 10-100 SCFM (100 to 850 SLPM)
1/2”NPT 3000 psig
(200 bar)
200ºF (93ºC)
Liquids:2%/1%
Air & Gas:5%/1%
10:1 1 or 2 switches
2323FGS/FS/FGT/FT Liquid
0-1 to 0-5 GPM (0-3.8 to 0-38 LPM)
Air & Gas
4-30 to 10-100 SCFM (100-850 SLPM)
1” NPT 5000 psig
(340 bar)
200ºF (93ºC)
Liquids:2%/1%
Air & Gas:5%/1%
10:1 1 or 2 switches
1 relay
 transmitter
NEMA 4X
Class 1-Div.2 
2421FG/FGS/FS Liquids Only
0-10 to 0-30 GPM (0-36 to 0-110 LPM)
1” NPT 1500 psig
(100 bar)
200ºF (93ºC)
Liquids:2%/1%
Air & Gas:5%/1%
10:1

1 or 2 switches

2423FGS/FS Liquids Only
0-10 to 0-30 GPM (0-36 to 0-110 LPM)
1” NPT 1500 psig
(100 bar)
200ºF (93ºC)
Liquids:2%/1%
Air & Gas:5%/1%
10:1

1 or 2 switches
1 relay
NEMA 4X

F-Flow G=Gauge S=Switch T=Transmitter
*Turndown results in 1st mark at approximately 10% of full scale
**NEMA 4X switch models have a 1/2 inch NPT conduit port as standard. A DIN 43650A-PG11 with mating connector is optional, rated IP65 & NEMA 4X


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