FS-930 Series – Oil Flow Switch, Flow Rate Settings: Port Size:

FS-930 Series – Oil Flow Switch, Flow Rate Settings: Port Size:
FS-930 Series – Oil Flow Switch,
Compensates For Viscosity Change In Fluids
Flow Rate Settings: 0.1 GPM to 1.0 GPM
Port Size: 1/4˝ NPT
Primary Construction Material: Brass
Setting Type: Fixed
ed
pprov
UL A on-Proof
si
Explo
A unique, patented piston design assures accuracy within 20% over a full range of
viscosities—from 40 to 2000 SSU. Ideal for use in applications where liquids of different
viscosities are blended; or for use in lubrication systems where oil flow monitoring is
critical at start-ups. Switch compensates for viscosity changes automatically. Each unit
is factory preset, using 300 SSU oil, for actuation at specified flow rates.
Ro H S
G
EM
®
S CO PLIAN
M
Ro H S
G
Brass
Piston
Brass
Spring
316 Stainless Steel
O-Ring
Other Wetted Parts
Pressure Rating
Operating, Maximum
Viton®
Epoxy
1000 PSIG (69 bar)
Proof
2500 PSIG (172 bar)
Burst
5000 PSIG (345 bar)
FLOW SWITCHES
Operating Temperature 
-20°F to + 300°F (-29°C to +148.9°C)
Repeatability
1% Maximum Deviation**
Set Point Accuracy
±10%
Set Point Differential
15% Maximum
Switch*
SPDT, 20 VA
Inlet/Outlet Ports
1/4˝ NPT
Electrical Termination
No. 18 AWG, 24˝ L., Polymeric Lead Wires
Explosion-Proof Approvals
U.L. Approved for Class I, Division 2, Groups A, B,
C, D. Also available with FM approved, explosion
proof junction box for Class I, Division 1, Group D
hazardous locations.
U.L. Approved — File No. E183854, RoHS
* See “Electrical Data” on Page X-5 for more information
**Reference at 300 SSU set point.
Dimensions
1/4" (6.3 mm)
9/32" DIA. (7.1 mm)
MTG. HOLES (2)
4-1/8"
(104.7 mm)
2-3/8"
(60.3 mm)
1/2" (12.7 mm)
1-1/4" (31.7 mm)
27/32" (21.4 mm)
1/4" NPT
BOTH PORTS
3/4"
(19.0 mm)
1"
(25.4 mm)
1-3/4"
(44.4 mm)
Electrical Connection, 1/2˝ NPT Conduit
1/2"
(12.7 mm)
G-16
EM
®
S CO PLIAN
M
T
U.L. Recognized —
File No. E31926
Specifications
Wetted Materials
Housing
T
Visit www.GemsSensors.com for most current information.
PISTON TYPE
How To Order – Standard Models
Pressure Drop – Typical
5
Flow Setting
GPM, ±10%
Part
Numbers
0.10
51582
0.25
51586
0.50
51590
0.75
51594
1.00
51598
4
Part No. 51590
3
2
Part No. 51598
Part No. 51582
1
0
0.1
Notes:
1. Flow settings are calibrated in a vertical position (lead wires up) with 300 SSU oil. Set points will
be maintained within 20% of settings in a liquid viscosity range of 40 to 2,000 SSU.
2. Use of 50 micron filtration is recommended.
0.5
1.0
1.5
FLOW RATE - GPM
Tests conducted with units in vertical position (lead wires up) with water at
+70°F (21°C).
FS-930 switches are U.L. Approved for Class I,
Division 2, Groups A, B, C, D hazardous locations.
They are also available with FM-approved, explosionproof junction box for Class I, Division 1, Group
D hazardous locations. Units must be assembled
completely at GEMS.
U.L. Approved — File No. E183854
Standard Wiring Color Code
Wire Color
Terminal
Orange
N.O.
Black
Common
Red
N.C.
FLOW SWITCHES
­– Stock Items.
PRESSURE DROP (PSID)
Specify Part Number based on flow setting.
Visit www.GemsSensors.com for most current information.
G-17
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