Series SFI-400 MIDWEST Sight Flow Indicator

Inexpensive Protection for Expensive Equipment and Systems

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Series 400 Sight Flow Indicators are manufactured of quality materials and safety tested to assure long, dependable service at economical prices. The 400 Series offer threaded or ANSI flanged process connections, tube style viewing, and bodies of cast iron or 316 SS. Featured in the 400 is glass tube construction offering easy flow viewing from any angle.

Starting at $472.15

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316SS Body - Tube Type - No Indicator

316SS Body - Tube Type - No Indicator - Flanged Connections

Cast Iron Body - Tube Type - No Indicator

Grouped product items
Model	Description	Availability*	Price
SFI-400CI-1	Sight flow indicator, 1" body, 5.625" (143 mm) length, 4.250" (108 mm) flange dia., 2.000" (51 mm) viewing dia., 6.2 lb (2.8 kg).	1-2 Weeks*	$472.15
SFI-400CI-1-1/2	Sight flow indicator, 1-1/2" body, 5.875" (149 mm) length, 5.000" (127 mm) flange dia., 2.500" (64 mm) viewing dia., 8.7 lb (4.0 kg).	1-2 Weeks*	$586.55
SFI-400CI-1-1/4	Sight flow indicator, 1-1/4" body, 5.750" (146 mm) length, 4.625" (117 mm) flange dia., 2.000" (51 mm) viewing dia., 7.6 lb (3.5 kg).	1-2 Weeks*	$518.95
SFI-400CI-2	Sight flow indicator, 2" body, 6.125" (156 mm) length, 6.000" (152 mm) flange dia., 3.000" (76 mm) viewing dia., 13 lb (6.0 kg).	1-2 Weeks*	$653.10
SFI-400F-1	Sight flow indicator, 1" body, 5.000" (127 mm) length, 4.250" (108 mm) flange dia., 2.000" (51 mm) viewing dia., 7 lb (3.2 kg).	1-2 Weeks*	$784.15
SFI-400F-1-1/2	Sight flow indicator, 1-1/2" body, 5.250" (133 mm) length, 5.000" (127 mm) flange dia., 2.500" (64 mm) viewing dia., 12 lb (5.4 kg).	1-2 Weeks*	$977.60
SFI-400F-1-1/4	Sight flow indicator, 1-1/4" body, 5.125" (130 mm) length, 4.625" (117 mm) flange dia., 2.000" (51 mm) viewing dia., 8 lb (3.6 kg).	1-2 Weeks*	$925.60
SFI-400F-2	Sight flow indicator, 2" body, 5.370" (137 mm) length, 6.000" (152 mm) flange dia., 3.000" (76 mm) viewing dia., 14 lb (6.4 kg).	1-2 Weeks*	$1,219.90
SFI-400F-3	Sight flow indicator, 3" body, 5.750" (146 mm) length, 7.500" (191 mm) flange dia., 4.000" (102 mm) viewing dia., 23 lb (10.4 kg).	1-2 Weeks*	$1,832.50
SFI-400F-4	Sight flow indicator, 4" body, 5.750" (146 mm) length, 9.000" (229 mm) flange dia., 5.000" (127 mm) viewing dia., 31 lb (14.1 kg).	1-2 Weeks*	$2,649.90
SFI-400SS-1	Sight flow indicator, 1" body, 5.625" (143 mm) length, 4.250" (108 mm) flange dia., 2.000" (51 mm) viewing dia., 6.2 lb (2.8 kg).	1-2 Weeks*	$840.30
SFI-400SS-1/2	Sight flow indicator, 1/2" body, 4.500" (114 mm) length, 3.500" (89 mm) flange dia., 1.500" (38 mm) viewing dia., 3.8 lb (1.7 kg).	1-2 Weeks*	$674.95
SFI-400SS-1-1/2	Sight flow indicator, 1-1/2" body, 5.875" (149 mm) length, 5.000" (127 mm) flange dia., 2.500" (64 mm) viewing dia., 8.7 lb (4.0 kg).	1-2 Weeks*	$949.50
SFI-400SS-1-1/4	Sight flow indicator, 1-1/4" body, 5.750" (146 mm) length, 4.625" (117 mm) flange dia., 2.000" (51 mm) viewing dia., 7.6 lb (3.5 kg).	1-2 Weeks*	$872.55
SFI-400SS-2	Sight flow indicator, 2" body, 6.125" (156 mm) length, 6.000" (152 mm) flange dia., 3.000" (76 mm) viewing dia., 13 lb (6.0 kg).	1-2 Weeks*	$1,098.25
SFI-400SS-3	Sight flow indicator, 3" body, 6.250" (159 mm) length, 7.500" (191 mm) flange dia., 4.000" (102 mm) viewing dia., 17 lb (7.7 kg).	1-2 Weeks*	$1,725.35
SFI-400SS-3/4	Sight flow indicator, 3/4" body, 5.125" (130 mm) length, 3.875" (98 mm) flange dia., 1.750" (44 mm) viewing dia., 4.8 lb (2.2 kg).	1-2 Weeks*	$732.15
SFI-400SS-4	Sight flow indicator, 4" body, 6.250" (159 mm) length, 9.000" (229 mm) flange dia., 5.000" (127 mm) viewing dia., 25 lb (11.0 kg).	1-2 Weeks*	$2,479.35

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 flanged.

Support Library

Product Literature

Catalog Pages

Series SFI-400 Catalog Page

Drawings

FAQ

Questions

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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