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Series-SFI-300F

SFI-300F: 300°F Sight Flow Indicators, ANSI Flange, Dual Windows, SS/CS Body

  • ANSI-flange design with dual viewing windows for clear visual flow confirmation
  •  Available with carbon-steel or 316 SS body materials for rugged process environments
  • Removable tempered glass windows simplify servicing and maintenance
  • Rated for up to ~200 °F (93 °C) operating temperature in standard configuration
Series-SFI-300F
From $ 1,250.39
SFI-300F: 300°F Sight Flow Indicators, ANSI Flange, Dual Windows, SS/CS Body Series-SFI-300F Series-SFI-300F
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Product Overview
  • Applications Fluid Measurement and Control, Oil
  • Media Compatibility Consult Factory
  • Operating Temperature, Max 200 °F
  • Measurement Pressure Type Gauge
  • Process Connection Type ANSI Flange
  • Requires Factory Media Review true
  • Series ID Series-SFI-300F

Supported Applications

The Dwyer Series SFI-300F Midwest Sight Flow Indicators are designed to display flow or contents in pipelines. These indicators serve applications involving compatible gases and liquids, utilizing a double window viewing style with no moving indicator (SFI-350F) or a 316 SS flapper (SFI-360F). The series is configured for industrial process monitoring where visual confirmation of fluid presence is required.

Operating Conditions & Performance

The SFI-300F series operates within specific temperature and pressure limits defined by the specification tables. The standard temperature limit is 200°F (93°C). Pressure ratings are listed as 150 psig (10.34 bar) for this flanged window style series. Mounting orientation supports horizontal or vertical installation; however, models with a flapper indicator (SFI-360F type) require horizontal mounting only.

Configuration Options

The SFI-300F series offers configurable body materials and gasket options to suit different process requirements. The available variants include:

  • Body Materials: Carbon steel (CS) or 316 SS.
  • Window Material: Tempered glass.
  • Gaskets: Buna-N, fluoroelastomer, or PTFE are available as options.
  • Process Connections: Raised face flange connections in sizes 1-1/2 inch through 6 inch.
  • Indicator Types: No moving indicator (SFI-350F) or a 316 SS flapper (SFI-360F).

The series supports connection sizes of 1-1/2, 2, 3, 4, and 6 inches. Model numbers follow the format SFI - [Body Style] - [Size] - [Options], such as SFI-350FCS for a carbon steel body with no moving indicator or SFI-360FSS for a stainless steel body with a flapper.

Key Product Differences

The primary distinction within the Series SFI-300F lies in the body material and the presence of an internal flow indicator. The 350F models feature no moving indicator, while the 360F models incorporate a 316 SS flapper to provide visual motion confirmation when fluid is present. Body options differentiate between carbon steel (CS) for general service and 316 stainless steel (SS) for corrosive environments or higher hygiene requirements.

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