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Johnson Controls F61 Fluid Flow Switch, SPDT

Fluid Flow Switch, SPDT
F61

The F61 Series Flow Switches are Single-Pole, Double-Throw (SPDT) flow switches used on fluid lines carrying water, ethylene glycol, or other fluids not classified as hazardous. They can be wired to energize one device and deenergize another device powered from the same source when fluid flow either exceeds or drops below the set flow rate.

The F61MG type flow switches are used for low-energy loads to operate small relays, solenoid valves, and electronic control circuits. These flow switches have gold-plated contacts for improved electrical performance in low voltage, low current circuits.

• Stainless steel paddle has three segments for use in pipes from 1 in. to 3 in. (25 mm to 75 mm) diameter
• Paddle segments can be removed or trimmed as needed
• F61KB-11 and F61MB-1 include a 6 in. (152 mm) paddle for pipes 4 in. to 6 in. (102 mm to 152 mm)
• Gold-plated contacts on F61MG-1 reduce intermittent contact problems in low-voltage and low-current circuits

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

Cat #Enclosure(NEMA)BellowsPaddle
F61KB-11CNEMA 1Phosphor BronzeStainless Steel; 3-piece Paddle (3 in., 2 in., and 1 in. Segments) Installed; 6 in. Paddle Supplied Uninstalled
F61LB-1CNEMA 3RPhosphor BronzeStainless Steel; 3-piece Paddle (3 in., 2 in., and 1 in. Segments) Installed
F61MB-1CNEMA 3RPhosphor BronzeStainless Steel; 3-piece Paddle (3 in., 2 in., and 1 in. Segments) Installed; 6 in. Paddle Supplied Uninstalled
F61MB-5CNEMA 3RStainless SteelStainless Steel; 3-piece Paddle (3 in., 2 in., and 1 in. Segments) Installed; 6 in. Paddle Supplied Uninstalled
F61MG-1CNEMA 3RPhosphor BronzeStainless Steel; 3-piece Paddle (3 in., 2 in., and 1 in. Segments) Installed; 6 in. Paddle Supplied Uninstalled
F61 Series Standard Flow Rate Switcht
Maximum Fluid Pressure 160 psig (1103 kPa)
Fluid Temperature
Minimum F61KB, F61LB: 32°F (0°C)F61MB, F61MG: -20°F (-29°C)
Minimum 250°F (121°C) for all models
Wiring Connections/strong> F61KB, F61LB: Screw Type Terminal F61MB, F61MG: Four Color-coded No. 14 AWG
Solid Conductor Wire Leads, 7 in. (178 mm) Long
Pipe Connector 1 in. 11-1/2 NPT Threads
Conduit Connection F61KB: One 7/8 in. (22 mm) Hole for 1/2 in. Conduit
with 1-3/32 in. (28 mm) Knockout Ring for 3/4 in Conduit F61LB, F61MB, F61MG:
Female Hub for 1/2 in. Conduit, 1/2-14 NPSM Threads
Paddle Installed Stainless Steel 3-piece Paddle (3 in., 2 in., and 1 in. Segments); Stainless Steel 6 in. Paddle
Supplied w/ F61MB and F61KB
Switch SPDT Snap-acting Pennswitch
Enclosure
Case F61KB: 0.062 in. (1.57 mm) Steel
F61LB, F61MB, F61MG: 0.062 in. (1.57 mm) Cold Drawn Steel
Cover F61KB: 0.028 in. (0.7 mm) Steel (NEMA 1)
F61LB: 0.062 in. (1.57 mm) Cold Drawn Steel, (NEMA 3R)
F61MB, F61MG: 0.062 in. (1.57 mm); Cold Drawn Steel, Gasketed (NEMA 3R Rain-tight)
Agency Listings
UL Listed All models: E5368, CCN NMFT
CSA Certified F61KB: LR948, Class 3211 06,Class 4813 02, Class 1222 01
F61LB: Not CSA CertifiedF61LB: Not CSA CertifiedF61LB: Not CSA CertifiedF61LB: Not CSA Certified
F61MB, F61MG: LR948, Class 3211 06
Shipping Weight 2.8 lb (1.3 kg)

• Use on lines carrying water or ethylene glycol
• Not for use with hazardous fluids or in hazardousatmospheres



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