Gems Sensors & Controls FS-4 Specifications
C
O
M
P
FS-4 Series –
Low Cost, Molded Plastic Construction
FLOW SWITCHES
Flow Rate Settings: 0.1 GPM to 1.5 GPM
Port Size: 9/16˝-18 UNF
Primary Construction Material: Ryton
®
Setting Type: Fixed
The FS-4 Series makes flow protection economical for a broad range of industrial
applications such as welders, lubrication systems, medical sterilizers and laundry
chemicals dispensing.
Specifications
Wetted Materials
Housing and Piston Ryton® R4
Spring 316 Stainless Steel
O-Ring Viton
®
Other Wetted Parts Epoxy
Operating Pressure, Maximum 250 PSIG (17.2 bar) @ 70°F (21°C)
Operating Temperature 0°F to 225°F (-17°C to +107°C)
Set Point Accuracy ±15% Maximum
Set Point Differential 20% Maximum
Switch* SPST or SPDT, 20 VA (SPDT: 240 VAC Max.)
Inlet/Outlet Ports 9/16˝ -18 UNF-2B Thread
Recommended Filtration 50 Microns or Better
Electrical Termination
SPST 18 AWG, Zipcord, 24˝ Long
SPDT 18 AWG, PVC 24˝ Long Leads
* See “Electrical Data” on Page X-5 for more information.
How To Order – Standard Models
Housing
and Piston
Material
®
Ryton
Flow
Setting
GPM
0.1
0.25
0.5
0.75
1.0
1.5
SPST Switch
N.O., No Flow N.C., No Flow
122340 122346 122352
122341 122347 122353
122342 122348 122354
122343 122349 122355
122344 122350 122356
122345 122351 122357
Note:
Flow settings are calibrated using water @ +70°F on increasing flow, with units in a vertical position
(lead wires up).
Part Numbers
With
SPDT Switch
Port Adapters for FS-4
Converts 9/16˝ threaded ports to NPT or barbed connection. Made of Ryton®-R4 or
polypropylene with O-Rings in place.
CAUTION: Do not exceed 15 in./lbs. maximum torque when installing adapter fittings.
Material Adapter Size Part Numbers
®
Ryton
Polypropylene
1/8˝ NPT*
1/4˝ NPT*
1/4˝ NPT*
1/2˝ Barb**
123028
123029
158602
158603
*Wrench flats provide for proper
assembly.
**Accepts 1/2˝ I.D. flexible hose
– Stock Items.
R
o HS
®
G
T
E
M
N
A
S
I
L
U.L. Recognized —
File No. E31926
CSA Listed —
File No. LR30200
Dimensions
1.90
48
.920 DIA
1.255
32
23
3.640
3.80
97
92
LEADWIRES
9/16˝ -18 UNF-2B THREAD
WITH O RING SEAL PORT
.586
15
1.00
25
Pressure Drop – Typical
3.0
2.5
2.0
1.5
Part No. 122352
1.0
PRESSURE DROP (PSID)
0.5
0
0 0.5 1.0 1.5 2.0
Tests conducted with units in vertical position (lead wires up) with water
at +70 F (21 C).
3/4˝ (19.0 mm)
HEX
.25˝
(6.3 mm)
1/8˝ NPT
3/4˝ (19.0 mm) DIA.
.62 FLAT
3/8˝ (9.5 mm)
1/2˝ (12.7 mm)
1˝
(25.4 mm)
Part No. 122355
FLOW RATE - GPM
1/2˝ (12.7 mm)
DIA.
1/2˝ Barb
1˝ (25.4 mm)
DIA.
.87 FLAT
(12.7 mm)
.54˝ (13.7 mm)
1/4˝ NPT
1/2˝
inch
mm
Part No. 122357
DIA.
(15.9 mm)
5/8˝
G-6
Visit www.GemsSensors.com for most current information.
FS-4 Series / p1of1 / 30-JUL-14
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