


Dwyer Instruments V4-SS-2-U | Vane operated flow switch | 316SS body | Universal vane
Robust and dependable, the Model V4-SS-2-U Flotect® Flow Switches are perfect for automatically safeguarding pipeline systems and equipment against harm caused by flow reduction or loss. This series has been tried and proven in thousands of pipeline installations and processing facilities worldwide. It is weatherproof, NEMA 4 compliant, and explosion-proof (specifications include a listing). Use this series on pipes up to 1-1/2" (38.10 mm).

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Approvals | ATEX, CE, CSA, FM, IECEx, UL |
Connection | Conduit: 3/4" female NPT or 19.05 mm standard or M25 with -BSPT option |
Connection | Electrical: UL and CSA models: 16 AWG, 6" (152 mm) long. ATEX and IECEx unit: Terminal block |
Connection | Process: 1-1/2" male NPT or 1-1/2" male BSPT or 38.10 mm |
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 |
Manufacturer | Dwyer Instruments |
Material | Wetted: 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) |
Maximum Operating Pressure | 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 |
Maximum operating temperature | -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) |
Mounting | Within 5° of vertical for proper operation. Units for horizontal installation (vertical pipe with up flow) available |
Rating | Electrical: 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] |
Set Point | Adjustment: For universal vane: five vane combinations |
Type | Vane operated flow switch |
Weight | 4 lb 8 oz (1.9 kg) |
- Excellent performance thanks to a special magnetically-activated switching configuration.
- Longer product life because to the free-swinging vane, which uses a straightforward lever arm instead of bellows, springs, or seals to activate a snap switch by drawing a magnet within the solid metal switch body.
- Long-lasting, leak-proof body made from bar stock satisfies application requirements.
- Electrical assemblies that are easily replaceable without removing the item from installation might save time and money on maintenance by avoiding the need to stop the process.
- Easy and quick installation using a threadolet, tee, or flange fitting that fits straight into a pipeline (see to the application drawings).
- High pressure ratings of 1000 psig (69 bar) for the brass body and 2000 psig (138 bar) for the SS body allow it to meet even the most demanding applications.
- meets the needs of customers for flow applications by offering the Model V4 field adjustable multilayer vane, which is calibrated especially for your application, or the Model V4-2-U,a custom vane (see set point chart).
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