Series SFI-100 & SFI-300 MIDWEST Sight Flow Indicator

Inexpensive Protection for Expensive Equipment and Systems

Series 100 and 300 Sight Flow Indicators are manufactured of quality materials and safety tested to assure long, dependable service at economical prices. The 100 and 300 Series offer threaded process connections, viewing windows, and bodies of brass or 316 SS. The 100 type has a single window with a rotating impeller, the 300 type has a double window with a rotating impeller, the 350 type has a double window with no moving indicator, and the 360 type has a double window with a flapper. All the types feature a removable window for easy service and replacement of wearing parts.

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Starting at $177.85

Ordering

Filter By

Series 100 - Bronze Body - Single Window with Impeller

Series 300 - Bronze Body - Double Window with Impeller

Series 300SS - 316 SS Body - Double Window with Impeller

Series 350 - Bronze Body - Double Window without Indicator

Series 350SS - 316 SS Body - Double Window without Indicator

Series 360 SFI - Bronze Body - Double Window with Flapper

Series 360SS SFI - 316 SS Body - Double Window with Flapper

Grouped product items
Model	Description	Availability*	Price
SFI-100-1	Sight flow indicator, 1" body, 4.375" L x 2.563" D x 2.625" H (111 x 65 x 67 mm), 2.7 lb (1.2 kg).	1-3 days*	$257.90
SFI-100-1/2	Sight flow indicator, 1/2" body, 4.000" L x 2.250" D x 2.563" H (102 x 57 x 65 mm), 1.5 lb (0.7 kg).	1-3 days*	$202.80
SFI-100-1/4	Sight flow indicator, 1/4" body, 3.000" L x 1.813" D x 2.125" H (76 x 46 x 54 mm), 1.1 lb (0.5 kg).	1-3 days*	$177.85
SFI-100-1-1/2	Sight flow indicator, 1-1/2" body, 5.688" L x 3.250" D x 3.625" H (144 x 83 x 92 mm), 5.5 lb (2.5 kg).	1-3 days*	$422.25
SFI-100-1-1/4	Sight flow indicator, 1-1/4" body, 4.375" L x 2.563" D x 2.625" H (111 x 65 x 67 mm), 2.7 lb (1.2 kg).	1-3 days*	$279.75
SFI-100-2	Sight flow indicator, 2" body, 5.688" L x 3.250" D x 3.625" H (144 x 83 x 92 mm), 5.5 lb (2.5 kg).	1-3 days*	$450.30
SFI-100-3/4	Sight flow indicator, 3/4" body, 4.000" L x 2.250" D x 2.563" H (102 x 57 x 65 mm), 1.5 lb (0.7 kg).	1-3 days*	$214.25
SFI-100-3/8	Sight flow indicator, 3/8" body, 3.000" L x 1.813" D x 2.125" H (76 x 46 x 54 mm), 1.1 lb (0.5 kg).	1-3 days*	$185.10
SFI-300-1	Sight flow indicator, 1" body, 4.375" L x 3.125" D x 2.563" H (111 x 79 x 65 mm), 3.0 lb (1.4 kg).	1-3 days*	$283.90
SFI-300-1/2	Sight flow indicator, 1/2" body, 4.063" L x 2.750" D x 2.563" H (103 x 70 x 65 mm), 2.6 lb (1.2 kg).	1-3 days*	$276.65
SFI-300-1/4	Sight flow indicator, 1/4" body, 3.063" L x 2.250" D x 2.125" H (78 x 57 x 54 mm), 1.7 lb (0.8 kg).	1-3 days*	$247.50
SFI-300-1-1/2	Sight flow indicator, 1-1/2" body, 5.500" L x 3.688" D x 4.063" H (140 x 93 x 103 mm), 7.0 lb (3.2 kg).	1-3 days*	$616.70
SFI-300-1-1/4	Sight flow indicator, 1-1/4" body, 4.375" L x 3.125" D x 2.563" H (111 x 79 x 65 mm), 3.0 lb (1.4 kg).	1-3 days*	$290.15
SFI-300-2	Sight flow indicator, 2" body, 5.500" L x 3.688" D x 4.063" H (140 x 93 x 103 mm), 7.0 lb (3.2 kg).	1-3 days*	$641.70
SFI-300-3/4	Sight flow indicator, 3/4" body, 4.063" L x 2.750" D x 2.563" H (103 x 70 x 65 mm), 2.6 lb (1.2 kg).	1-3 days*	$276.65
SFI-300-3/8	Sight flow indicator, 3/8" body, 3.063" L x 2.250" D x 2.125" H (78 x 57 x 54 mm), 1.7 lb (0.8 kg).	1-3 days*	$256.90
SFI-300SS-1	Sight flow indicator, 1" body, 4.375" L x 3.125" D x 2.563" H (111 x 79 x 65 mm), 3.0 lb (1.4 kg).	1-3 days*	$511.70
SFI-300SS-1/2	Sight flow indicator, 1/2" body, 4.063" L x 2.750" D x 2.563" H (103 x 70 x 65 mm), 2.6 lb (1.2 kg).	1-3 days*	$427.45
SFI-300SS-1/4	Sight flow indicator, 1/4" body, 3.063" L x 2.250" D x 2.125" H (78 x 57 x 54 mm), 1.7 lb (0.8 kg).	1-3 days*	$369.20
SFI-300SS-1-1/2	Sight flow indicator, 1-1/2" body, 5.500" L x 3.688" D x 4.063" H (140 x 93 x 103 mm), 7.0 lb (3.2 kg).	1-2 Weeks*	$1,130.50
SFI-300SS-1-1/4	Sight flow indicator, 1-1/4" body, 4.375" L x 3.125" D x 2.563" H (111 x 79 x 65 mm), 3.0 lb (1.4 kg).	1-2 Weeks*	$521.05
SFI-300SS-3/4	Sight flow indicator, 3/4" body, 4.063" L x 2.750" D x 2.563" H (103 x 70 x 65 mm), 2.6 lb (1.2 kg).	1-3 days*	$450.30
SFI-300SS-3/8	Sight flow indicator, 3/8" body, 3.063" L x 2.250" D x 2.125" H (78 x 57 x 54 mm), 1.7 lb (0.8 kg).	1-2 Weeks*	$395.20
SFI-350-1/2	Sight flow indicator, 1/2" body, 4.063" L x 2.750" D x 2.563" H (103 x 70 x 65 mm), 2.6 lb (1.2 kg).	1-2 Weeks*	$257.90
SFI-350-1/4	Sight flow indicator, 1/4" body, 3.063" L x 2.250" D x 2.125" H (78 x 57 x 54 mm), 1.7 lb (0.8 kg).	1-2 Weeks*	$227.75
SFI-350-1-1/2	Sight flow indicator, 1-1/2" body, 5.500" L x 3.688" D x 4.063" H (140 x 93 x 103 mm), 7.0 lb (3.2 kg).	1-2 Weeks*	$582.40
SFI-350-1-1/4	Sight flow indicator, 1-1/4" body, 4.375" L x 3.125" D x 2.563" H (111 x 79 x 65 mm), 3.0 lb (1.4 kg).	1-2 Weeks*	$276.65
SFI-350-3/4	Sight flow indicator, 3/4" body, 4.063" L x 2.750" D x 2.563" H (103 x 70 x 65 mm), 2.6 lb (1.2 kg).	1-2 Weeks*	$260.00
SFI-350-3/8	Sight flow indicator, 3/8" body, 3.063" L x 2.250" D x 2.125" H (78 x 57 x 54 mm), 1.7 lb (0.8 kg).	1-2 Weeks*	$236.10
SFI-350SS-1/2	Sight flow indicator, 1/2" body, 4.063" L x 2.750" D x 2.563" H (103 x 70 x 65 mm), 2.6 lb (1.2 kg).	1-2 Weeks*	$475.30
SFI-350SS-1/4	Sight flow indicator, 1/4" body, 3.063" L x 2.250" D x 2.125" H (78 x 57 x 54 mm), 1.7 lb (0.8 kg).	1-2 Weeks*	$395.20
SFI-350SS-1-1/4	Sight flow indicator, 1-1/4" body, 4.375" L x 3.125" D x 2.563" H (111 x 79 x 65 mm), 3.0 lb (1.4 kg).	1-2 Weeks*	$557.45
SFI-350SS-3/4	Sight flow indicator, 3/4" body, 4.063" L x 2.750" D x 2.563" H (103 x 70 x 65 mm), 2.6 lb (1.2 kg).	1-2 Weeks*	$487.75
SFI-350SS-3/8	Sight flow indicator, 3/8" body, 3.063" L x 2.250" D x 2.125" H (78 x 57 x 54 mm), 1.7 lb (0.8 kg).	1-2 Weeks*	$418.10
SFI-360-1/2	Sight flow indicator, 1/2" body, 4.063" L x 2.750" D x 2.563" H (103 x 70 x 65 mm), 2.6 lb (1.2 kg).	1-2 Weeks*	$271.45
SFI-360-1/4	Sight flow indicator, 1/4" body, 3.063" L x 2.250" D x 2.125" H (78 x 57 x 54 mm), 1.7 lb (0.8 kg).	1-2 Weeks*	$240.25
SFI-360-1-1/2	Sight flow indicator, 1-1/2" body, 5.500" L x 3.688" D x 4.063" H (140 x 93 x 103 mm), 7.0 lb (3.2 kg).	1-2 Weeks*	$604.25
SFI-360-1-1/4	Sight flow indicator, 1-1/4" body, 4.375" L x 3.125" D x 2.563" H (111 x 79 x 65 mm), 3.0 lb (1.4 kg).	1-2 Weeks*	$289.10
SFI-360-3/4	Sight flow indicator, 3/4" body, 4.063" L x 2.750" D x 2.563" H (103 x 70 x 65 mm), 2.6 lb (1.2 kg).	1-2 Weeks*	$276.65
SFI-360-3/8	Sight flow indicator, 3/8" body, 3.063" L x 2.250" D x 2.125" H (78 x 57 x 54 mm), 1.7 lb (0.8 kg).	1-2 Weeks*	$252.70
SFI-360SS-1/2	Sight flow indicator, 1/2" body, 4.063" L x 2.750" D x 2.563" H (103 x 70 x 65 mm), 2.6 lb (1.2 kg).	1-2 Weeks*	$470.10
SFI-360SS-1/4	Sight flow indicator, 1/4" body, 3.063" L x 2.250" D x 2.125" H (78 x 57 x 54 mm), 1.7 lb (0.8 kg).	1-2 Weeks*	$398.30
SFI-360SS-1-1/2	Sight flow indicator, 1-1/2" body, 5.500" L x 3.688" D x 4.063" H (140 x 93 x 103 mm), 7.0 lb (3.2 kg).	1-2 Weeks*	$1,213.70
SFI-360SS-1-1/4	Sight flow indicator, 1-1/4" body, 4.375" L x 3.125" D x 2.563" H (111 x 79 x 65 mm), 3.0 lb (1.4 kg).	1-2 Weeks*	$569.90
SFI-360SS-3/4	Sight flow indicator, 3/4" body, 4.063" L x 2.750" D x 2.563" H (103 x 70 x 65 mm), 2.6 lb (1.2 kg).	1-2 Weeks*	$484.65
SFI-360SS-3/8	Sight flow indicator, 3/8" body, 3.063" L x 2.250" D x 2.125" H (78 x 57 x 54 mm), 1.7 lb (0.8 kg).	1-2 Weeks*	$430.55

Specifications

Service:: Compatible gases and liquids.
Wetted Materials:: Window: tempered glass; Body: bronze or 316 SS; Gasket: Buna-N, fluoroelastomer or PTFE; Indicator: ABS or 316 SS impeller (100 and 300), 304 SS or 316 SS flapper (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.

Support Library

Product Literature

Catalog Pages

Series SFI-100 & SFI-300 Catalog Page

Approvals

Drawings

Model Chart

EXAMPLE	SFI	100	1/4	W2	Series SFI-100-1/4-W2 Sight Flow Indicator, single window, bronze body, ABS impeller, 1/4" body, with plexiglas window.
SERIES	SFI				Sight Flow Indicator
BODY STYLE		100 100MP 300 300MP 300SS 300SSMP 350 350MP 350SS 350SSMP 360 360MP 360SS 360SSMP			Single Window, Bronze Body, ABS Impeller Single Window, Bronze Body, ABS Impeller, 150 psi Double Window, Bronze Body, ABS Impeller Double Window, Bronze Body, ABS Impeller, 150 psi Double Window, SS Body, ABS Impeller Double Window, SS Body, ABS Impeller, 150 psi Double Window, Bronze Body, no Moving Indicator Double Window, Bronze Body, no Moving Indicator, 150 psi Double Window, SS Body, no Moving Indicator Double Window, Bronze Body, no Moving Indicator, 150 psi Double Window, Bronze Body, 304SS Flapper Double Window, Bronze Body, 304SS Flapper, 150 psi Double Window, SS Body, 304SS Flapper double Window, SS Body, 304SS Flapper, 150 psi
BODY SIZE			1/4 3/8 1/2 3/4 1 1-1/4 1-1/2 2		1/4" 3/8" 1/2" 3/4" 1" 1-1/4" 1-1/2" 2"
OPTIONS				W2 G1 G2 S1 S2 S3 S4 I1 I2 I3 F1 ST BSPT BSPP	Plexiglas Window PTFE Gasket Fluoroelastomer Gasket Brass Shaft 316SS Shaft Monel Shaft No Shaft ABS Impeller with Bronze Bushing 316SS Impeller No Impeller 316SS Flapper Stainless Steel Tag BSPT Threads BSPP Threads

FAQ

Questions

Question

If a customer complains the impeller in his sight flow indicator is not turning, what is most likely the problem?

Answer

Usually the impeller is fouled or the indicator is doing its job and actually indicating no flow.

Related

Series SFI-100 & SFI-300

Series SFI-700

Question

If a customer claims the plastic impeller dissolved in plain water, what probably happened?

Answer

The customer exposed the sight flow indicator to fluid temperatures of 400-500 degrees Fahrenheit, considerably in excess of the published temperature specification.

Related

Series SFI-100 & SFI-300

Series SFI-700

Question

I see that the SFI-300 MIDWEST Sight Flow Indicator has a flow direction shown as an arrow. What will happen if water flows in the opposite direction? Will the rotating impeller rotate in both directions? I want to use the indicator on a wakeboard boat to show water being pumped in both directions on a wake ballast system.

Answer

The inlets and outlets for SFI-300 are designed for flow to only be in one direction. You could physically push flow in the opposite direction, but you would risk damaging the impeller, and you would not get a true indication of flow.

Related