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Series Flow Switch  FS-10798 Gems Sensors

Gems Sensors Series Flow Switch

These externally adjustable switches are ideal for protecting machine tools from coolant flow failure, for protecting bearings from loss of lubricant or to assure proper air flow.
Stock
-1
Code
FS-10798

Gems Sensors Series Flow Switch

 Externally Adjustable for Water, Oils and Gases

Quick Specs... 

  • Flow Rate Settings: Liquids - Infinite Adjustment between 0.5 GPM and 20.0 GPM; Air/Gases - See chart 
  • Port Size: 1/2" NPT 
  • Primary Construction Material: Brass or Stainless Steel 
  • Setting Type: Adjustable

Overview / Design Principle: 

These externally adjustable switches are ideal for protecting machine tools from coolant flow failure, for protecting bearings from loss of lubricant or to assure proper air flow. They offer an infinite number of flow settings at pressures up to 1000 PSIG (68.9 bar), with low pressure drop and precise repeatability. 

The adjusting vane is easily field adjustable using an ordinary flat-bladed screwdriver. The adjustment is set-screw-locked for tamper-free operation after field calibration.  

Applications: 

  • Electronic Equipment: Laser Heads, Welders, Power Supplies, High Speed Spindles, X-Ray Tubes, Semiconductor Equipment 
  • Bearings or Gears: Presses, Rotating Equipment, Conveyors, Machine Tools, Robotics 
  • Processing & Dispensing Equipment: Water Purifications and Filtering, X-Ray Film Processing, Beverage Dispensing, Chemical Additives, Gas Sampling, Distilling

 

Specifications: 

Wetted Materials 

Housing 

Brass or 316 Stainless Steel   

Piston (In Brass Housing) 

Polysulfone for Water 

Piston (In S.S. Housing) 

316 Stainless Steel Only 

Spring 

316 Stainless Steel 

O-Ring 

Viton ® 

Other Wetted Parts 

Epoxy 

Pressure Rating     

Operating 

1000 PSIG (68.9 bar) 

Proof 

2500 PSIG (172.4 bar) 

Burst 

5000 PSIG (344.7 bar) 

Operating Temperature     

With Brass or S.S. Piston 

-20°F to +300°F (-29°C to +148.9°C) 

With Polysulfone Piston  

-20°F to +225°F (-29°C to +107.2°C) 

Other Specifcations 

Repeatability 

1% Maximum Deviation 

Set Point Accuracy 

±10% Maximum 

Set Point Differential 

15% Maximum  

Switch* 

SPDT, 20 VA  

Inlet/Outlet 

1/2" NPT 

Electrical Termination 

No. 18 AWG, 24" L., Polymeric Lead Wires 

 IMPORTANT REED SWITCH PROTECTION INFORMATION: Read before installing.

*These switches are not intended for use in freezing liquids or steam/high condensation environments. Contact Gems for alternative solutions if these environments exist.
 

Air/Gas Flow Adjustment Ranges 
Water or oil flow units should not be utilized for air/gas applications. The FS-10798 Gas Flow configuration utilizes special dash-pot piston for reliability. The flow adjustment ranges are typical for air service. For other gases, the flow range will vary with the density of the gas. Please consult factory for more information.
For 5 PSIG Line*  1 to 75 SCFM Approx.
For 100 PSIG Line  3 to 160 SCFM Approx.
*Minimum 5 PSI line pressure required.
 

FS-10798 switches are U.L. Approved for Class I, Division 2, Groups A, B, C, D hazardous locations.

 

 Wire Leads and Strain Relief 
 DimFS10798.gif 
A  Flow Actuation Adjustment 
B  2" (50.8 mm) 
C  4-1/8" (104.7 mm) 
D  1/2" NPT Both Ports 
E  1-1/4" (31.7 mm) 
F  5/8" (15.8 mm) 
G  3/4" (19.0 mm) 
 1/2" NPT Conduit Connector 
 DimFS10798NPT.gif 
A  1-1/16" (26.9 mm) MAX. 
B  1/2" (12.7 mm) 

Product Documentation

FS-10798 Series
FS-10798 Series - Download PDF
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