Dwyer Instruments SERIES FS-2 Catalog Page

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SERIES FS-2 | W. E. ANDERSON™ BY DWYER

VANE FLOW SWITCH

FLOW

Low Cost, Field Adjustable Set Point and Paddle

The Series FS-2 Vane Flow Switch offers an economical ow proving solution. The FS-2 paddles are adjustable to t 1 to 8˝ size pipe.

FEATURES/BENEFITS

• Field adjustable set point adjustment screw allows for easy ow switch modication

• Custom application set points enabled by eld adjustable vane layers

• Aluminum weatherproof housing permits outdoor installation

APPLICATIONS

• Boiler ow proving

• Hot water heaters

• Chillers

• Cooling lines

• Machinery

• Liquid transfer systems

APPROXIMATE ACTUATION/DEACTUATION FLOW RATES FOR WATER; GPM (LPM)

Pipe Size

1˝ 1-1/4˝ 1-1/2˝ 2˝ 2-1/2˝ 3˝ 4˝ 5˝ 6˝ 8˝

Blade Vane Length in (mm) Dim. X

1.34 (34)

2.24 (57)

3.46 (88)

6.57 (167)

Minimum Setting Maximum Setting

Actuate Deactuate Actuate Deactuate

4.0 (15.0)

5.3 (20.0)

7.0 (26.7)

14.1 (53.3)

18.5 (70.0)

27.7 (105.0)

59.4 (225.0)

52.8 (200.0)

75.7 (286.7)

184.9 (700.0)

1.8 (6.7)

2.6 (10.0)

4.0 (15.0)

9.7 (36.7)

15.4 (58.3)

25.1 (95.0)

52.8 (200.0)

39.6 (150.0)

52.8 (200.0)

158.5 (600.0)

8.8 (33.3)

11.4 (43.3)

14.5 (55.0)

31.3 (118.3)

35.2 (133.3)

52.8 (200.0)

123.3 (466.7)

132.1 (500.0)

154.1 (583.3)

396.3 (1500.0)

6.6 (25.0)

8.4 (31.7)

11.4 (43.3)

22.5 (85.0)

30.8 (116.7)

46.2 (175.0)

114.5 (433.3)

123.3 (466.7)

140.9 (533.3)

374.2 (1416.7)

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Shown with conduit connection option

SPECIFICATIONS Service: Compatible liquids.

Wetted Materials: Bellow: Tin-bronze;

Vane: SS; Body: Forged brass.

Temperature Limit: 230ºF (110ºC). Pressure Limit: 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 or optional conduit

connection.

MODEL CHART Model Description FS-2 Paddle ow switch

OPTIONS To order add sufx: Description

-BSPT Process connection

Example: FS-2-BSPT

-CND Conduit connection, 1˝ NPT female conduit connection with

Example: FS-2-CND

USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

no 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.

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