Dwyer

V4 Flotect Vane-Operated Flow Switch

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

Starting At
$505.00 CAD
Normally ships in 3-4 Weeks

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he 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.

• Leak proof body machined from bar stock
• Choice of custom vane calibrated for your application, Model V4, or field adjustable multilayer vane, Model V4-2-U (see Set Point Chart)
• Installs directly and easily into pipeline with a threadolet, tee, or flange (see Application Drawings)
• Can be used in pipes 1-1/2 in and up
• Electrical assembly can be easily replaced without removing the unit from installation so that the process does not have to be shut down
• High pressure rating of 1000 PSIG (69 Bar) with the brass body and 2000 PSIG (138 Bar) with the 316 SS body
• Unique magnetically actuated switching design gives superior performance
• Features 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

Service Gases or liquids compatible with wetted materials
Wetted Materials Vane: 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 -4F - 275F (-20C - 135C) standard, see Data Sheet for details
Pressure Limit Brass 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 Rating Weatherproof and Explosion-proof. See Data Sheet for details.
Switch Type SPDT snap switch standard, DPDT snap switch optional
Electrical Rating UL, 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 Connections UL and CSA models: 16 AWG, 6 in (152 mm) long. ATEX and IECEx unit: Terminal block
Conduit Connection 3/4 in female NPT or 19.05 mm standard or M25 with -BSPT option
Process Connection 1-1/2 in male NPT or 1-1/2 in male BSPT or 38.10 mm
Mounting Orientation Within 5 of vertical for proper operation. Units for horizontal installation (vertical pipe with up flow) available
Set Point Adjustment For universal vane: five vane combinations
Weight 4 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