FS2
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Dwyer Series FS-2 Vane Flow Switch

$ 47.00

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Product Description

Low Cost, Field Adjustable Set Point and Paddle

The Series FS-2 Vane Flow Switch offers an economical flow proving solution. Custom set points tailored for the application are enabled by field adjustable vane layers and a set point adjustment screw. The FS-2 features an aluminum weatherproof housing for outdoor installation. Paddles are adjustable to fit 1″ to 8″ size pipe. FS-2 is ideal for use in “flow or no flow” applications in cold and hot water systems.

Product Application

  • Perfect for proving flow in boilers, hot water heaters, and chillers.

Models

Model Description
FS-2

Paddle flow switch, 1″ male NPT.
FS-2-BSPT

Paddle flow switch, 1″ male BSPT.
FS-2-CND

Paddle flow switch, NPT process connection, conduit electrical connection
FS-2-W8

Paddle flow switch, 1″ male NPT connection with 8 ft leads

Specifications

Service:
Compatible liquids.
Wetted Materials:
Bellow: Tin-bronze; Vane: Stainless Steel; Body: Forged brass.
Temperature Limits:
230°F (110°C).
Pressure Limits:
145 psig (10 bar).
Enclosure Rating:
NEMA 4 (IP64).
Switch Type:
SPDT snap switch.
Electrical Rating:
10 A res, 3 A ind @ 250 VAC.
Electrical Connection:
Cable gland with attached wire leads.
Process Connection:
1″ male NPT or BSPT.
Mounting Orientation:
Switch must be installed vertically on horizontal pipe runs.
Set Point Adjustment:
Four vane combinations and an adjustment screw.
Enclosure:
Die-cast aluminum alloy.
Weight:
28.22 oz (0.8 kg).
Agency Approvals:
CE.

Features

  • Field adjustable vane
  • Field adjustable set point
  • Weatherproof construction

Literature

Manuals

Instruction Manual

Catalog Pages

Series FS-2 Catalog Page

Approvals

CE Approval

Drawings

Accessories

Model Number Description
Replacement vane assembly FS-2-VANE Replacement vane assembly

FAQ

Question
What does actuation and de-actuation mean?
Answer
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.
Question
On your Flow Switches, which model has a Form C type contact
Answer
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.