General Purpose
Quick Specs...
Overview / Design Principle:
This series of precision-calibrated switches provides reliable and consistent performance; repeatability is within 1%. FS-925 units are factory preset for actuation at specified flow rates. These switches provide accurate detection of excessive or insufficient flow rates in such applications as: protecting against loss of fluid flow in hydraulic systems, assuring proper coolant flow in semiconductor processing equipment, monitoring high pressure lubrication systems, and ensuring proper air flow in water/waste systems.
Applications:
Wetted Materials
- Housing: Brass or 316 Stainless Steel - Piston (In Brass Housing): Polysulfone for water, Brass for oil or air - Piston (SS Housing): 316 Stainless Steel - Spring: 316 Stainless Steel - O-Ring: Viton® - Other Wetted Parts: Epoxy
Pressure Rating
- Operating, Maximum
1000 PSIG (69 bar)
- Proof
2500 PSIG (172 bar)
- Burst
5000 PSIG (345 bar)
Operating Temperature
- With Brass or S.S. Piston
-20°F to +300°F (-29°C to +148.9°C)
- With Polysulfone
-20°F to +225°F (-29°C to +107.2°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
Switches are U.L. Approved for Class I, Division 2, Groups A, B, C, D hazardous areas. They are also available with FM-approved explosion-proof junction box for Class I, Division 1, Group D hazardous loactions. Units must be completely assembled at Gems.
Line Pressure
FS-925
FS-926
M"
Max.
5 PSIG (Minimum)
0.5 SCFM
10 SCFM
2 SCFH
15 SCFH
100 PSIG
1.5 SCFM
25 SCFM
7 SCFH
50 SCFH
IMPORTANT REED SWITCH PROTECTION INFORMATION: Read before installing. Gas Calibration Water flow units should not be used for air/gas applications: Gas flow units have a special dash-pot piston for reliable operation. Gas calibration is dependent upon line pressure, switch orientation, and the specific type of gas. The calibrated flow set point is subject to change with fluctuations in line pressure.
Dimensions: