Sight Flow Indicators

Sight Flow Indicators are local visual indicators of flow rate. Viewing windows at economical prices that are easily replaceable and serviceable.

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

Inexpensive Protection for Expensive Equipment and Systems

Model 100/100MP - Single window, bronze body, ABS impeller	Model 300/300MP - Double window, bronze body, ABS impeller	Series SFI-300 MIDWEST Sight Flow Indicator (SFI-300SS-1/4 shown)
Series SFI-350 MIDWEST Sight Flow Indicator, bronze body, no impeller	Model 360F - Window Style with Flanged Connections	SFI-400 Series - Tube Style with Threaded or Flanged Connections
	SFI-700 Series - Tube Style with Threaded Connections

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.

Models & Ordering

Model	Description
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).
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).
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).
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).
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).
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).
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).
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).

Series 500 Sight Window

Shows Level or Contents of Tanks, Pipelines; Tempered, Replaceable Glass Window

Tough, tempered glass window resists chemical attack and abrasion. Seamless gasket assures perfect seal and is easily field replaceable. In addition to the standard brass body, Model 500 Sight Windows are also available in carbon steel or 316 stainless steel to suit a wide range of chemical compatibility.

Product Applications

Hydraulic Tanks
Pressure Vessels
Coolant Tanks
Hydraulic Lines
Oil Reservoirs

Models & Ordering

Model	Description
SFI-500B-1	Sight window, 1" male NPT.
SFI-500B-1-1/2	Sight window, 1-1/2" male NPT.
SFI-500B-1-1/4	Sight window, 1-1/4" male NPT.
SFI-500B-2	Sight window, 2" male NPT.
SFI-500B-3/4	Sight window, 3/4" male NPT.

Series 550 Sight Window

Shows Level or Contents of Tanks, Pipelines; Fused Glass and Steel Construction

Fused glass style sight windows feature glass to metal bond for utmost reliability. Plated steel bodies have convenient hex wrench surfaces. Connections are standard NPT in sizes from 1/4" to 2". Windows are clear, ripple free, and flush with the front face, having no recess on which dirt might collect.

Product Applications

Hydraulic Tanks
Pressure Vessels
Coolant Tanks
Hydraulic Lines
Oil Reservoirs

Models & Ordering

Model	Description
SFI-550-1	Sight window, 1" male NPT.
SFI-550-1/2	Sight window, 1/2" male NPT.
SFI-550-1/4	Sight window, 1/4" male NPT.
SFI-550-1-1/2	Sight window, 1-1/2" male NPT.
SFI-550-1-1/4	Sight window, 1-1/4" male NPT.
SFI-550-2	Sight window, 2" male NPT.
SFI-550-3/4	Sight window, 3/4" male NPT.
SFI-550-3/8	Sight window, 3/8" male NPT.

Series SFI-300F MIDWEST Sight Flow Indicator

Inexpensive Protection for Expensive Equipment and Systems

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

Models & Ordering

Model	Description
SFI-350FCS-1-1/2	Sight flow indicator, 1-1/2" body, 6.375" (162 mm) length, 5.000" (127 mm) flange dia., 2.313" (58 mm) viewing dia., 12 lb (5.5 kg).
SFI-350FCS-2	Sight flow indicator, 2" body, 6.500" (165 mm) length, 6.000" (152 mm) flange dia., 2.313" (58 mm) viewing dia., 16 lb (7.5 kg).
SFI-350FCS-3	Sight flow indicator, 3" body, 8.875" (225 mm) length, 7.500" (191 mm) flange dia., 3.000" (76 mm) viewing dia., 38 lb (17 kg).
SFI-350FCS-4	Sight flow indicator, 4" body, 10.250" (260 mm) length, 9.000" (229 mm) flange dia., 4.000" (102 mm) viewing dia., 56 lb (25 kg).
SFI-350FCS-6	Sight flow indicator, 6" body, 12.500" (318 mm) length, 11.000" (279 mm) flange dia., 6.000" (152 mm) viewing dia., 120 lb (55 kg).

Series SFI-400 MIDWEST Sight Flow Indicator

Inexpensive Protection for Expensive Equipment and Systems

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.

Models & Ordering

Model	Description
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).
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).
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).
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).

Series SFI-700 MIDWEST Sight Flow Indicator

Inexpensive Protection for Expensive Equipment and Systems

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.

Models & Ordering

Model	Description
SFI-700-1	Sight flow indicator, 1" body, 4.875" L x 2.750" H (124 x 70 mm), 5.1 lb (2.3 kg).
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).
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).
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).
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).
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).
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).