Series V8 Flotect® Vane Operated Flow Switch

Field Adjustable – 1 to 6 Inch Pipe, Leak Proof Body, Chemical Resistance

The Series V8 Flotect® Vane Operated Flow Switches are ideal for protecting unattended equipment from damage or loss of production. This Series is available for installation in a 1 to 6" pipe with operating pressures are up to 150 psig (10 bar) and temperatures to 212°F (100°C).

Product Applications

  • Chemical processing
  • Air conditioning
  • Refrigeration
  • Heating systems
  • Cooling lines
  • Machinery
  • Liquid transfer systems
  • Water treatment
  • Food processing
  • Machine tools

Models & Ordering

Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

Build Your Custom Part. Use our Product Configurator

Model Description Usually Ships* Price Order
Ships: 5-6 Weeks
Price: $96.00
Vane operated flow switch. 5-6 Weeks* $96.00 Order
Ships: 5-6 Weeks
Price: $137.00
Vane operated flow switch with weatherproof enclosure (phenylpolioxide). 5-6 Weeks* $137.00 Order

Can't find what you need? Build Your Custom Part. Use our Product Configurator


Compatible gases or liquids.
Wetted Materials:
Vane and Body: Polyphenylene Sulfide (PPS); Pin and spring: 316 SS or Inconel®; Magnet: Ceramic 8.
Temperature Limit:
212°F (100°C).
Pressure Limit:
150 psig (10 bar).
Enclosure Rating:
General purpose; WP/WP2 option is weatherproof.
Switch Type:
SPDT snap switch; MV option: SPDT gold contact snap switch.
Electrical Rating:
5 A @ 125/250 VAC, 5 A resistive, 3 A inductive @ 30 VDC. MV option: 1 A @ 125 VAC, 1 A resistive, 0.5 A inductive @ 30 VDC.
Electrical Connections:
18 AWG 18" (460 mm) long.
Conduit Connection:
1/2" male NPT, 1/2" female NPT on WP and WP2.
Process Connection:
1" male NPT.
Mounting Orientation:
Actuation/deactuation flow rates are based on horizontal pipe run and are nominal values. Unit cannot be used with vertical down flow.
Set Point Adjustment:
Vane is trimmable.
4.5 oz (0.13 kg).
Agency Approvals:
CE, cURus.


  • Suitable for mounting in a protected environment with UL recognition as an industrial motor controller per UL standard 508
  • Increased product life with 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
  • Excellent chemical resistance and leak proof body and vane constructed of tough durable polyphenylene sulfide
  • Solves application needs with full size trimmable vane is provided with molded-in graduations


  • Gold Plated Contacts, for dry circuits. Rated 1A @ 125 VAC; 1A resistive, 0.5A inductive @ 30 VDC. To order add suffix -MV. Example: V8-MV.
  • Inconel® Alloy Option. Inconel® Alloy replaces standard 316 SS wetted parts. Wetted parts are Inconel® Alloy, ceramic 8, and Polyphenylene Sulfide. To order add suffix -INC. Example: V8-INC.
  • Weatherproof Enclosure (not UL approved). Optional housing provides weatherproof protection for electrical wiring. To order add suffix -WP (phenylpolioxide) or -WP2 (aluminum). Example: V8-WP or V8-WP2


Model Chart

EXAMPLE V8 MV Series V8-MV Flotect® Vane Operated Flow Switch, with gold contacts.
SERIES V8   Flotect® Vane Operated Flow Switch
Body Assembly with Inconel®
Gold Contacts
Stainless Steel Tag
Weatherproof Conduit Box
Metal Weatherproof Conduit Box

Product Literature


Catalog Pages




Can the V8 float switch be used with acids due to its material of construction?
No. The V8 contains a 316SS pin and spring as well as a ceramic 8 magnet that are not compatible.
What does actuation and de-actuation mean?
Actuation means that the flow rate has reached a point where the microswitch trips or the contacts of the microswitch change state. De-actuation means that the flow rate has decreased to a point where the microswitch returns to its normal state.
What material is used as a seal between the process fluid and the electrical portion of the switch?
The body material; as there is no separate "seal" since the body is machined from solid stock and the switch is magnetically actuated.
On your Flow Switches, which model has a Form C type contact
Form C contact is a SPDT snap switch. Many of Dwyer’s flow switches have SPDT snap switches. The V4, V6, V7, FS-2, and V8 are some of them.

Photo Downloads

You must be logged in to view this content.
Click here to login to your account.

Product Reviews

Only registered users can write reviews. Please Sign in or create an account