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Starting at $1,165.88CAD
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In Stock *
Dwyer

V4 Flotect Vane-Operated Flow Switch

In Stock *

Dependable protection against flow variation or stopping in pipelines for fluids, gases, and flowing solids

Starting at
$1,165.88CAD
Some configurations are in stock for immediate delivery!
Have questions? We're here to help!
Have questions? We're here to help!
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The Series V4 Flotect® Flow Switches is 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 in (38.10 mm) and up.

• 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)
ServiceGases or liquids compatible with wetted materials
Wetted MaterialsVane: 316 SS;
Body: Brass or 316 SS standard;
Magnet Keeper: 430 SS standard, 316 SS optional;
Options: Other materials also available, consult us (e.g. PVC, Hastelloy, Nickel, Monel, Titanium)
Temperature Limit-4°F - 275°F (-20°C - 135°C) standard, see Data Sheet for details
Pressure LimitBrass body 1000 PSIG (69 Bar), 316 SS body 2000 PSIG (138 Bar), optional 5000 PSIG (345 Bar) available with 316 SS body and SPDT switch only
Enclosure RatingWeatherproof and Explosion-proof. See Data Sheet for details.
Switch TypeSPDT snap switch standard, DPDT snap switch optional
Electrical RatingUL, FM, ATEX and IECEx models 10 A @ 125/250 VAC. CSA models: 5 A @ 125/250 VAC; 5 A res., 3 A ind. @ 30 VDC . MV option: 1 A @ 125 VAC; 1 A res., .5 A ind. @ 30 VDC. MT option: 5 A @ 125/250 VAC. [MT and MV option not UL, CSA, FM or ATEX or IECEx]
Electrical ConnectionsUL and CSA models: 16 AWG, 6 in (152 mm) long. ATEX and IECEx unit: Terminal block
Conduit Connection3/4 in female NPT or 19.05 mm standard or M25 with -BSPT option
Process Connection1-1/2 in male NPT or 1-1/2 in male BSPT or 38.10 mm
Mounting OrientationWithin 5° of vertical for proper operation. Units for horizontal installation (vertical pipe with up flow) available
Set Point AdjustmentFor universal vane: five vane combinations
Weight4 lb 8 oz (1.9 kg)
Agency Approvals**ATEX, CE, CSA, FM, IECEx, UL
**No housing option (-NH) has no approvals

• 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

  • Thumbnail of document Data Sheet - V4 Flotect Vane-Operated Flow Switch
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    Data Sheet - V4 Flotect Vane-Operated Flow Switch

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  • Thumbnail of document Manual - V4 Flotect Vane-Operated Flow Switch
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    Manual - V4 Flotect Vane-Operated Flow Switch

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  • Thumbnail of document Brochure - V4 Flotect Vane-Operated Flow Switch
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    Brochure - V4 Flotect Vane-Operated Flow Switch

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