Product Overview

ManualsBrandsDwyer ManualsHVAC Supplies3/4" Midwest Bronze Sight Flow Indicator

SPECIFICATIONS

SFI-100 & SFI-300 SPECIFICATIONS

Service: Compatible gases and liquids.

Wetted Materials: Window: Tempered

glass; Body: Bronze or 316 SS; Gasket:

Buna-N, uoroelastomer or PTFE;

Indicator: ABS or 316 SS impeller (100

and 300), 304 SS or 316 SS apper

(360).

Temperature Limit: 200°F (93°C);

120°F (48°C) on W2 option; 170°F

(77°C) on I1 option.

Pressure Limit: 125 psig (8.62 bar), 150

psig (10.34 bar) on “MP” models.

Connections: Threaded.

Mounting Orientation: Horizontal or

vertical; 360: Horizontal only.

SFI-300F SPECIFICATIONS

Service: Compatible gases and liquids.

Wetted Materials: Window: Tempered

glass; Body: Carbon steel or 316 SS;

Gasket: Buna-N, uoroelastomer or

PTFE; Indicator: 316 SS apper (360).

Temperature Limit: 200°F (93°C).

Pressure Limit: 150 psig (10.34 bar).

Connections: Flanged.

Mounting Orientation: Horizontal or

vertical; 360: Horizontal only.

SFI-400 SPECIFICATIONS

Service: Compatible gases and liquids.

Wetted Materials: Tube: Borosilicate;

Body: Cast iron or 316 SS; Gasket:

PTFE.

Temperature Limit: 200°F (93°C).

Pressure Limit: 50 psig (3.45 bar).

Connections: Threaded or anged.

SFI-700 SPECIFICATIONS

Service: Compatible gases and liquids.

Wetted Materials: Tube: Tempered

borosilicate; Body: Brass or 316 SS;

Gasket: Fluoroelastomer; Indicator:

Acetal.

Temperature Limit: 212°F (100°C).

Pressure Limit: 230 psig (15.86 bar).

Connections: Threaded.

The Series SFI Midwest Sight Flow Indicator is a Series of sight indicators which

display ow or contents of pipelines. Available in window viewing style in the SFI-100

and SFI-300 Series and tube viewing style in the SFI-400 and SFI-700 Series with

connection choices of female NPT, BSPP or BSPT threaded and anged.

Series SFI-100 & SFI-300 Midwest Sight Flow Indicator offers threaded process

connections, viewing windows, and bodies of brass or 316 SS. The SFI-100 type has

a single window with a rotating impeller, the 300 type has a double window with a

rotating impeller, the SFI-350 type has a double window with no moving indicator, and

the SFI-360 type has a double window with a apper.

Series SFI-300F Midwest Sight Flow Indicator offers ANSI ange process

connections, double viewing windows, and bodies of carbon steel or 316 SS. The SFI-

350F type has a double window with no moving indicator and the SFI-360F type has

a double window with a apper.

Series SFI-400 Midwest Sight Flow Indicator offers threaded or ANSI anged

process connections, tube style viewing, and bodies of cast iron or 316 SS.

Series SFI-700 Midwest Sight Flow Indicator offers threaded process connections,

tube style viewing, and bodies of brass or 316 SS.

FEATURES/BENEFITS

• Manufactured of quality materials and safety tested to assure long, dependable

service at economical prices

• All Series SFI-100, SFI-300 and SFI-300F feature a removable window for easy

service and replacement of wearing parts

• The Series SFI-400 features glass tube construction offering easy ow viewing

from any angle

• Series SFI-700 offers an easy to see bright

red Acetal rotating impeller that is easy to

view from any angle with the glass tube

construction

• Maintenance is simple for the Series SFI-700

with internal wipers which restore full 360°

visibility by simply rotating the glass tube

without disrupting the ow

APPLICATIONS

• Hydraulic tanks

• Pressure vessels

• Coolant tanks

• Hydraulic lines

• Oil reservoirs

DWYER INSTRUMENTS, INC. | dwyer-inst.com268

Sight Flow Indicators

FLOW

MIDWEST SIGHT FLOW INDICATORS

Inexpensive Protection for Expensive Equipment and Systems

Model 100, 100MP ++

Model 300, 300MP ++

Model 360F

Model 400

Model 700 ++

MODEL CHART

Model Description

SFI-100

SFI-300

SFI-350

SFI-360

SFI-400

SFI-700

Single window with impeller

Double window with impeller

Double window with no indicator

Double window with apper

Tube type with no indicator

Tube type with impeller and

internal wipers to clean glass tube

DIMENSIONS AND WEIGHT

Model Body Size Length Depth Height Flange Diameter Viewing Area Diameter Weight lb (kg)

SFI-100 1/4, 3/8

1/2, 3/4

1, 1-1/4

1-1/2, 2

3.000 (76)

4.000 (102)

4.375 (111)

5.688 (144)

1.813 (46)

2.250 (57)

2.563 (65)

3.250 (83)

2.125 (54)

2.563 (65)

2.625 (67)

3.625 (83)

1.1 (0.5)

1.5 (0.7)

2.7 (1.2)

5.5 (2.5)

SFI-300 1/4, 3/8

1/2, 3/4

1, 1-1/4

1-1/2, 2

3.063 (78)

4.063 (103)

4.375 (111)

5.500 (140)

2.250 (57)

2.750 (70)

3.125 (79)

3.688 (93)

2.125 (54)

2.563 (65)

4.063 (103)

1.7 (0.8)

2.6 (1.2)

3.0 (1.4)

7.0 (3.2)

SFI-700 1/4, 3/8

1/2, 3/4

1, 1-1/4,

1-1/2

2.750 (70)

3.688 (94)

4.875 (124)

1.500 (38)

2.250 (57)

2.750 (70)

(across ats)

0.9 (0.4)

2.4 (1.1)

5.1 (2.3)

SFI-400 1/2

3/4

1-1/4

1-1/2

4.500 (144)

5.125 (130)

5.625 (143)

5.750 (146)

5.875 (149)

6.125 (156)

6.250 (159)

3.500 (89)

3.875 (98)

4.250 (108)

4.625 (117)

5.000 (127)

6.000 (152)

7.500 (191)

9.00 (229)

1.500 (38)

1.750 (44)

2.000 (51)

2.500 (64)

3.000 (76)

4.000 (102)

5.000 (127)

3.8 (1.7)

4.8 (2.2)

6.2 (2.8)

7.6 (3.5)

8.7 (4.0)

13 (6.0)

17 (7.7)

25 (11.0)

SFI-400F 1

1-1/4

1-1/2

5.000 (127)

5.125 (130)

5.250 (133)

5.370 (137)

5.750 (146)

4.250 (108)

4.625 (117)

5.000 (127)

6.000 (152)

7.500 (191)

9.000 (229)

2.000 (51)

2.500 (64)

3.000 (76)

4.000 (102)

5.000 (127)

7 (3.2)

8 (3.6)

12 (5.5)

14 (6.4)

23 (10.4)

31 (14.1)

SFI-300F 1-1/2

6.375 (162)

6.500 (165)

8.875 (225)

10.250 (260)

12.500 (318)

5.000 (127)

6.000 (152)

7.500 (191)

9.000 (229)

11.000 (279)

2.313 (58)

3.000 (76)

4.000 (102)

6.000 (152)

12 (5.5)

16 (7.5)

38 (17)

56 (25)

120 (55)

Dimensions are in inches (mm)

SERIES SFI-100, SFI-300, SFI-300F, SFI-400 & SFI-700 | W. E. ANDERSON

™

BY DWYER

++ USA: California Proposition 65

WARNING: Cancer and Reproductive Harm

- www.P65Warnings.ca.gov

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