Series SFI-700 MIDWEST Sight Flow Indicator

Inexpensive Protection for Expensive Equipment and Systems

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Series 700 Sight Flow Indicators are manufactured of quality materials and safety tested to assure long, dependable service at economical prices. The 700 Series offer threaded process connections, tube style viewing, and bodies of brass or 316 SS. Featured in the 700 is a bright red Acetal rotating impeller that is easy to view from any angle with the glass tube construction. Maintenance is simple with internal wipers, just rotate the glass tube and restore visibility without disrupting the flow.

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Starting at $461.75

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316SS Body - Tube Type with Impeller

Brass Body - Tube Type with Impeller

Grouped product items
Model	Description	Availability*	Price
SFI-700-1/2	Sight flow indicator, 1/2" body, 3.688" L x 2.250" H (94 x 57 mm), 2.4 lb (1.1 kg).	1-2 Weeks*	$563.70
SFI-700-1/4	Sight flow indicator, 1/4" body, 2.750" L x 1.500" H (70 x 38 mm), 0.9 lb (0.4 kg).	1-2 Weeks*	$461.75
SFI-700-1-1/2	Sight flow indicator, 1-1/2" body, 4.875" L x 2.750" H (124 x 70 mm), 5.1 lb (2.3 kg).	1-2 Weeks*	$1,012.95
SFI-700-1-1/4	Sight flow indicator, 1-1/4" body, 4.875" L x 2.750" H (124 x 70 mm), 5.1 lb (2.3 kg).	1-2 Weeks*	$897.50
SFI-700-3/4	Sight flow indicator, 3/4" body, 3.688" L x 2.250" H (94 x 57 mm), 2.4 lb (1.1 kg).	1-2 Weeks*	$687.45
SFI-700-3/8	Sight flow indicator, 3/8" body, 2.750" L x 1.500" H (70 x 38 mm), 0.9 lb (0.4 kg).	1-2 Weeks*	$527.30
SFI-700SS-1/2	Sight flow indicator, 1/2" body, 3.688" L x 2.250" H (94 x 57 mm), 2.4 lb (1.1 kg).	1-2 Weeks*	$875.70
SFI-700SS-1-1/2	Sight flow indicator, 1-1/2" body, 4.875" L x 2.750" H (124 x 70 mm), 5.1 lb (2.3 kg).	1-2 Weeks*	$1,849.10
SFI-700SS-1-1/4	Sight flow indicator, 1-1/4" body, 4.875" L x 2.750" H (124 x 70 mm), 5.1 lb (2.3 kg).	1-2 Weeks*	$1,573.50
SFI-700SS-3/4	Sight flow indicator, 3/4" body, 3.688" L x 2.250" H (94 x 57 mm), 2.4 lb (1.1 kg).	1-2 Weeks*	$952.65
SFI-700SS-3/8	Sight flow indicator, 3/8" body, 2.750" L x 1.500" H (70 x 38 mm), 0.9 lb (0.4 kg).	1-2 Weeks*	$808.10

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.

Support Library

Product Literature

Manuals

Instruction Manual

Catalog Pages

Series SFI-700 Catalog Page

Drawings

Model Chart

EXAMPLE	SFI	700	1/4	ST	Series SFI-700-1/4-ST Sight Flow Indicator, brass, 1/4" body, with stainless steel tag.
SERIES	SFI				Sight Flow Indicator
BODY STYLE		700 700SS			Brass 316SS
BODY SIZE			1/4 3/8 1/2 3/4 1 1-1/4 1-1/2		1/4" 3/8" 1/2" 3/4" 1" 1-1/4" 1-1/2"
OPTIONS				ST BSPT BSPP	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.

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