Dwyer

L4 Flotect Float Switch

Perfect for starting or stopping pumps, opening or closing valves, or actuating level alarm signals

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$647.00 CAD
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Rugged and reliable the Series L4 Flotect® Float Switch operates automatically to indicate tank level. Perfect for starting or stopping pumps, opening or closing valves, or actuating level alarm signals. A unique magnetically actuated switching design gives superior performance. There are no bellows, springs, or seals to fail. Instead, the free-swinging float attracts a magnet within the solid metal switch body, actuating a snap switch by means of a simple lever arm. Float arm hinge design limits the arm angle to prevent vertical hang up.

• Leak proof body machined from bar stock
• Choice of floats dependant on maximum pressure and specific gravity
• Weatherproof, designed to meet NEMA 4
• Explosion-proof
• Installs directly and easily into tank with a threaded branch connection or flange
• Electrical assembly can be easily replaced without removing the unit from the installation so that the process does not have to be shut down
• Horizontal installation or optional top mount vertical installation
• Unique magnetically actuated switching design gives superior performance
• No bellows, springs, or seals to fail
• Free-swinging float attracts a magnet within the solid metal switch body, actuating a snap switch by means of a simple lever arm
• Float arm hinge design limits the arm angle to prevent vertical hang up

Service Liquids compatible with wetted materials
Wetted Materials Float and Rod: 316 SS;
Body: Brass or 316 SS standard;
Magnet Keeper: 430 SS standard, 316 SS or nickel optional.
Temperature Limits 4F - 275F (-20C - 135C) standard, MT high temperature option 400F (205C) (MT option not UL, CSA, ATEX or IECEx).
ATEX and IECEx options:
Ambient temperature -4F - 163F (-20C - 73C);
Process temperature -4F - 163F (-20C - 73C)
Pressure Limit Brass body 1000 PSIG (69 Bar), 316 SS body 2000 PSIG (138 Bar). Standard float rated 100 PSIG (6.9 Bar). For other floats, see options
Enclosure Rating Weatherproof and Explosion-proof. See Data Sheet for full rating.
Switch Type SPDT snap switch standard, DPDT snap switch optional
Electrical Rating UL, FM, ATEX and IECEx models: 10 A @ 125/250 VAC (V~).
CSA models: 5 A @ 125/250 VAC (V~); 5 A res., 3 A ind. @ 30 VDC.
MV option: 1 A @ 125 VAC (V~); 1 A res., .5 A ind. @ 30 VDC.
MT option: 5 A @ 125/250 VAC (V~). (MT and MV option not UL, CSA, FM, ATEX or IECEx)
Electrical Connection UL and CSA models: 16 AWG, 6" (152 mm) long. ATEX and IECEx units: terminal block
Conduit Connection 3/4 in (19.05 mm) female NPT standard or M25 with -BSPT option
Process Connection 1-1/2 in (38.10 mm) male NPT or 1-1/2 in (38.10 mm) male BSPT standard,
2-1/2 in (63.50 mm) male NPT or 2-1/2 in (63.50 mm) male BSPT standard optional floats
Mounting Orientation Horizontal installation standard, optional vertical top mount
Deadband 3/4 in (19 mm) for standard float
Specific Gravity 0.7 minimum with standard float. For other floats see Options/Accessories page
Weight 4 lb 9 oz (2.07 kg)
Agency Approvals ATEX, CE, CSA, FM, IECEx, UL**
**No Housing Option (-NH) has no approvals

• Direct pump control for maintaining level
• Automatic tank dump operations
• Control levels or provide alarms in sumps, scrubber systems, hydro-pneumatic tanks, low pressure boilers, and various water/wastewater treatment processes
• Level control
• Valve control