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Series-V4
Flotect® Flow Switches: Weatherproof, Explosion-Proof, Low Flow Protection
Models In Stock
- Superior performance with unique magnetically-actuated switching design
- Increased product life due to free-swinging vane, which attracts a magnet within the solid metal switch body and actuates a snap switch by means of a simple lever arm with no bellows, springs, or seals to fail
- Meets application requirements with durable leak-proof body machined from bar stock
- Save time and money on maintenance with electrical assembly that can be easily replaced without removing the unit from installation so that the process does not have to be shut down
- Quick installation with fitting that installs directly and easily into pipeline with a threadolet, tee, or flange (see application drawings)
- Meets the most demanding applications with high pressure rating of 1000 psig (69 bar) for the brass body and 2000 psig (138 bar) for the SS body
- Solves customer flow application needs with choice of custom vane calibrated specifically for your application, Model V4, or field adjustable multilayer vane, Model V4-2-U (see set point chart)
Series-V4
From
$
705.00
Models In Stock

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Product Overview
- Applications Fluid Measurement and Control, HVAC, Oil, Pump Control
- Compliance Hazardous Location Rated
- Electrical Connection 3/4 in NPT male Conduit with Screw Terminal block
- Enclosure Ratings Hazardous Location Rated, Weatherproof
- Enclosure Ratings Note Weatherproof and Explosion-proof. **Listed with UL and CSA for Class I, Groups C and D; Class II, Groups E, F, and G. ATEX 2813 II 2 G Ex db IIB T6 Gb -20°C≤Tamb≤73°C, -20°C≤Process Temp≤73°C. EU-Type Certificate No.: KEMA 03 ATEX 2383. ATEX Standards: EN 60079-0:2012+A11:2013; EN 60079-1:2014. IECEx Certified: For Ex db IIB T6 Gb -20°C≤Tamb≤73°C. -20°C≤ProcessTemp≤73°C. IECEx Certificate of Conformity: IECEx DEK 11.0071.IECEx Standards: IEC 60079-0:2011; IEC 60079-1:2014. Zone I. Also FM approved.
- Media Compatibility Alcohols, Argon, Compatible Gases, Compatible Liquids, Nitrogen, Oils, Water
- Mounting Orientation ± 5° from Vertical
- Operating Temperature, Max 275 °F
- Operating Temperature, Min -4 °F
- Pipe Size, Max 20 in
- Pipe Size, Min 1.5 in
- Pressure Type Gauge
- Process Connection Size 1 1/2 in
- Process Connection Type NPT Male
- Process Temperature, Max 163 °F
- Process Temperature, Min -4 °F
- Set Point Adjustment Vane adjustments
- Switch Rating 10 A @ 125/250 Vac
- Switch Rating Note 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(V ). MV option: 1 A @125 VAC (V~); 1 A res., .5 A ind. @ 30 VDC (V ). MT option: 5 A @ 125/250 VAC (V~). [MT and MV option not UL, CSA, FM, ATEX or IECEx]
- Weight 1.9 kg
- Wire Gauge 16 AWG
The Series V4 Flotect® Flow Switches are rugged and reliable, ideal for automatically protecting equipment and pipeline systems against damage from reduction or loss of flow. Time tested in thousands of pipeline installations and processing plants around the world this Series is Weatherproof, designed to meet NEMA 4 and Explosion-proof (listing included in specifications). This series can be used in pipes 1-1/2" (38.10 mm) and up.
Product Applications
- Protects pumps, motors and other equipment against low or no flow
- Controls sequential operation of pumps
- Automatically starts auxiliary pumps and engines
- Stops liquid cooled engines, machines and processing when coolant flow is interrupted
- Shuts down burner when air flow through heating coil fails
- Controls dampers according to flow