SERIES V4 FLOTECT® VANE OPERATED FLOW SWITCH
The Dwyer SERIES V4 FLOTECT® Vane Operated Flow Switch is a rugged and reliable device designed to automatically protect equipment and pipeline systems from damage due to reduced or lost flow. It is suitable for use in a wide range of liquid and gas applications. Key features include a magnetic actuation design with a free-swinging vane, a durable body machined from bar stock capable of withstanding high pressures, and a standard weatherproof and explosion-proof enclosure with multiple certifications for hazardous areas. The unit offers versatility with a field-adjustable universal vane and allows for easy replacement of the electrical assembly without removing the unit from the pipeline. Applications include protecting pumps and motors from low flow and managing sequential operation of equipment.
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
Specifications
SERIES V4 FLOTECT® VANE OPERATED FLOW SWITCH
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 factory (e.g. PVC, Hastelloy, Nickel, Monel, Titanium). |
Temperature Limit
-4 to 275°F (-20 to 135°C) standard, MT high temperature option 400°F (205°C) [MT option not UL, CSA, ATEX or IECEx]. ATEX and IECEx options, ambient temperature -4 to 163°F (-20 to 73°C); Process temperature -4 to 163°F (-20 to 73°C). |
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. Listed with UL and CSA for Class I, Groups C and D; Class II, Groups E, F, and G. ATEX CE 2813 EX II 2 G Ex db IB 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 IB T6 Gb – 20°C≤Tamb≤73°C. -20°C≤Process Temp≤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. |
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″ (152 mm) long. ATEX and IECEx unit: Terminal block. |
Conduit Connection
3/4″ female NPT or 19.05 mm standard or M25 with -BSPT option. |
Process Connection
1-1/2″ male NPT or 1-1/2″ 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). |
Compliance
ATEX, CE, CSA, FM, IECEx, UL. |
Note
No housing option (-NH) has no approvals. |
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