Series V4 Flotect Vane-Operated Flow Switch

Brand: Dwyer Instruments, LLC

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.
Features
  • Unique magnetically actuated switching design gives superior performance
  • A free-swinging vane which attracts a magnet within the solid metal switch body, actuating a snap switch by means of a simple lever arm with no bellows, springs, or seals to fail
  • Leak proof body machined from bar stock
  • Electrical assembly can be easily replaced without removing the unit from installation so that the process does not have to be shut down
  • Installs directly and easily into pipeline with a thredolet, tee, or flange (see application drawings)
  • High pressure rating of 1,000 psig (69 bar) with the brass body and 2,000 psig (138 bar) with the 316 SS body
  • Choice of custom vane calibrated for your application, Model V4, or field adjustable multilayer vane, Model V4-2-U

Specifications

Adjustable Set Point Range

  • 5 Vane Combination

Ambient Temperature Range

  • -20° to 73° C (-4° to 163° F)

Approvals & Certifications

  • ATEX
  • CE
  • CSA
  • Ex d IIB T6 Gb, II 2 G Ex d IIB T6 Gb
  • FM
  • IEC Ex
  • UL

Conduit Connection

  • 3/4” NPT Female

Electrical Connectors

  • 16 AWG, 6” (152 mm) Long
  • Terminal Block

Electrical Contacts

  • Gold-Plated Contacts, Options for Dry Circuits

Electrical Rating

  • 1 A at 125 Vac
  • 10 A at 125/250 Vac
  • 3 A at 30 Vdc
  • 5 A at 125/250 Vac
  • 5 A at 30 Vdc
  • 5 A Resistive

Enclosure, Body Material

  • 316 Stainless Steel
  • Brass

Environmental Protection

  • Class I, Groups C & D
  • Class II, Div. 1, Groups E, F, G
  • Explosion-proof
  • Weatherproof

Flow Rate

  • 17 to 10,000 scfm (8 to 4,700 LPS) - Cold Air
  • 3 to 2,400 gpm (11.67 to 9,083 LPM) - Cold Water

Media

  • Compatible Gas
  • Compatible Liquids

NPT Connection

  • 1-1/2” NPT Female

Pipe Size

  • 1.5” to 20”

Process Temperature

  • -20° to 73° C (-4° to 163° F)

Sensor Orientation

  • Horizontal
  • Within 5° of Vertical for Proper Operation

Supply Pressure

  • psig: 5,000 (kPa: 34,470, bar: 345)

Switch Type

  • DPDT Snap Switch
  • SPDT Snap Switch

Temperature Range

  • -20° to 135° C (-4° to 275° F)

Wetted Materials

  • 316 Stainless Steel - Vane
  • 430 Stainless Steel Standard - Magnet Keeper

  • 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
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