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Series V4 Flotect Vane-Operated Flow Switch
Brand: Dwyer Instruments, LLCThe 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
1 - 12 of 640 Part Numbers
V4
- Body Material - Brass, Custom Vane
- Switch Type - SPDT Snap
- Switching Element - Standard
- Temperature - -20° to 135° C (-4° to 275° F)
- Relay - Standard
- Material - 430 Stainless Steel Keeper
- Flow Path - Upward Flow in Vertical Pipe
- Agency Approvals - Weatherproof & Explosion-Proof
V4-2-U
- Body Material - Brass Body, Universal Vane
- Switch Type - SPDT Snap
- Switching Element - Standard
- Temperature - -20° to 135° C (-4° to 275° F)
- Relay - Standard
- Material - 430 Stainless Steel Keeper
- Flow Path - Upward Flow in Vertical Pipe
- Agency Approvals - Weatherproof & Explosion-Proof
V4-2-U-316
- Body Material - Brass Body, Universal Vane
- Switch Type - SPDT Snap
- Switching Element - Standard
- Temperature - -20° to 135° C (-4° to 275° F)
- Relay - Standard
- Material - 316 Stainless Steel Magnet Keeper
- Flow Path - Upward Flow in Vertical Pipe
- Agency Approvals - Weatherproof & Explosion-Proof
V4-2-U-316-AT
- Body Material - Brass Body, Universal Vane
- Switch Type - SPDT Snap
- Switching Element - Standard
- Temperature - -20° to 135° C (-4° to 275° F)
- Relay - Standard
- Material - 316 Stainless Steel Magnet Keeper
- Flow Path - Upward Flow in Vertical Pipe
- Agency Approvals - ATEX Compliant Construction
V4-2-U-316-IEC
- Body Material - Brass Body, Universal Vane
- Switch Type - SPDT Snap
- Switching Element - Standard
- Temperature - -20° to 135° C (-4° to 275° F)
- Relay - Standard
- Material - 316 Stainless Steel Magnet Keeper
- Flow Path - Upward Flow in Vertical Pipe
- Agency Approvals - IECEx Certified Construction
V4-2-U-316-V
- Body Material - Brass Body, Universal Vane
- Switch Type - SPDT Snap
- Switching Element - Standard
- Temperature - -20° to 135° C (-4° to 275° F)
- Relay - Standard
- Material - 316 Stainless Steel Magnet Keeper
- Flow Path - Vertical Up Flow
- Agency Approvals - Weatherproof & Explosion-Proof
V4-2-U-316-V-AT
- Body Material - Brass Body, Universal Vane
- Switch Type - SPDT Snap
- Switching Element - Standard
- Temperature - -20° to 135° C (-4° to 275° F)
- Relay - Standard
- Material - 316 Stainless Steel Magnet Keeper
- Flow Path - Vertical Up Flow
- Agency Approvals - ATEX Compliant Construction
V4-2-U-316-V-IEC
- Body Material - Brass Body, Universal Vane
- Switch Type - SPDT Snap
- Switching Element - Standard
- Temperature - -20° to 135° C (-4° to 275° F)
- Relay - Standard
- Material - 316 Stainless Steel Magnet Keeper
- Flow Path - Vertical Up Flow
- Agency Approvals - IECEx Certified Construction
V4-2-U-AT
- Body Material - Brass Body, Universal Vane
- Switch Type - SPDT Snap
- Switching Element - Standard
- Temperature - -20° to 135° C (-4° to 275° F)
- Relay - Standard
- Material - 430 Stainless Steel Keeper
- Flow Path - Upward Flow in Vertical Pipe
- Agency Approvals - ATEX Compliant Construction
V4-2-U-D
- Body Material - Brass Body, Universal Vane
- Switch Type - DPDT Contacts
- Switching Element - Standard
- Temperature - -20° to 135° C (-4° to 275° F)
- Relay - Standard
- Material - 430 Stainless Steel Keeper
- Flow Path - Upward Flow in Vertical Pipe
- Agency Approvals - Weatherproof & Explosion-Proof
V4-2-U-D-316
- Body Material - Brass Body, Universal Vane
- Switch Type - DPDT Contacts
- Switching Element - Standard
- Temperature - -20° to 135° C (-4° to 275° F)
- Relay - Standard
- Material - 316 Stainless Steel Magnet Keeper
- Flow Path - Upward Flow in Vertical Pipe
- Agency Approvals - Weatherproof & Explosion-Proof
V4-2-U-D-316-AT
- Body Material - Brass Body, Universal Vane
- Switch Type - DPDT Contacts
- Switching Element - Standard
- Temperature - -20° to 135° C (-4° to 275° F)
- Relay - Standard
- Material - 316 Stainless Steel Magnet Keeper
- Flow Path - Upward Flow in Vertical Pipe
- Agency Approvals - ATEX Compliant Construction
1 - 12 of 640 Part Numbers
Specifications
Brand
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