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Vane Operated Flow Switch - V4 Series
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Field Adjustable Dependable Protection Against Flow Variation or Stopping in Pipelines for Fluids, Gases and Flowing Solids
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View large image
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Literature: |
Dwyer Cateogry V4 Series |
Type(s)
of Use
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Instruments and Gages -
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Size Info: |
Weight: 4 lb 8 oz (1.9 kg). |
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Options: |
Options (add as a suffix to the model number):
-D, DPDT contacts
-MV, Gold Plated Contacts, options for dry circuits (see electrical rating in specification, no listings or approvals)
-MT, High Temperature, option rated 400ฐ F (204ฐ C)
(see electrical rating in specifications, no listings or approvals
-TRI (increasing flow), -TRD (decreasing flow), Time Delay Relay, option with 2 SPDT contacts, adjustable from 0-1 to 0-31 minutes. (no listings or approvals)
-316, 316 SS Magnet Keeper, option to replace standard 430 SS
-SAA, SAA listed construction
-V, Vertical Up Flow, option for upward flow in vertical pipe
-AT, ATEX listed construction |
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Features: |
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)
Weatherproof, designed to meet NEMA 4
Explosion-proof (listing included in specifications)
Installs directly and easily into pipeline with a thredolet, tee, or flange (see application drawings)
Can be used in pipes 1-1/2˝ 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 |
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Benefits: |
Rugged and reliable the Flotectฎ V4 flow switch operates automatically to protect equipment and pipeline systems against damage from reduction or loss of flow. The V4 is time tested being installed in thousands of pipelines and processing plants around the world. A unique magnetically actuated switching design gives superior performance. There are no bellows, springs, or seals to fail. Instead, a freeswinging
vane attracts a magnet within the solid metal switch body, actuating a snap switch by means of a simple lever arm. |
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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 |
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