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ANSI 300 & 600 Pressure Class High Pressure Sight Flow Indicators

Available in flanged models only, these sight flow indicators meet tough ANSI standards for 300 and 600 pressure class requirements. Made from single-piece, cast-construction bodies, these SFIs are available with all four styles of Penberthy indication.​​​

​Models:

300 pressure class series

  • SH: NPT SFI (plain)

  • SHF: NPT SFI (flapper)

  • SMR: NPT SFI (rotator)

  • SMD: NPT SFI (drip tube)

  • SM-F: Flanged SFI (plain)

  • SMF-F: Flanged SFI (flapper)

  • SMR-F: Flanged SFI (rotator)

  • SMD-F: Flanged SFI (drip tube)​​

​Models:

600 pressure class series

  • SH: NPT SFI (plain)

  • SHF: NPT SFI (flapper)

  • SHR: NPT SFI (rotator)

  • SHD: NPT SFI (drip tube)

  • SH-F: Flanged SFI (plain)

  • SHF-F: Flanged SFI (flapper)

  • SHR-F: Flanged SFI (rotator)

  • SHD-F: Flanged SFI (drip tube)

Materials of construction for body:

  • Standard:

    • ASTM A216 steel gr. WCB

    • ASTM A351 316L/316 STS gr. CF3M/CF8M

  • Optional:

    • ​ASTM 494 Monel® gr. M-30C

    • ASTM A494 Hastelloy® C CW12MW

    • ASTM A734 Alloy 20 CN7M

    • Consult factory for other materials.

*Product images are for reference only, please refer to general or approval drawings for accurate dimensions.*

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High pressure sight flow indicator applications:

Naturally occurring high pressure wells (natural gas, petroleum, geothermal steam) and long-distance pumping (transportation) of liquids and gases require high pressure sigh flow indicators to observe fluid dynamics.

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Chemical processes often require that fluids be in their liquid state. To achieve this, the chemical must remain under pressure at all times so that it can be transported using high pressure pumps. Observing the flow of chemicals such as Argon, Hydrogen, Nitrogen, Oxygen, Carbon Monoxide, Propane, Ethyl Methyl Ether, Butane, Isobutane, Pentane in their liquid state requires high pressure sight flow indicators.

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Industrial areas where high pressure pipelines are used include:

  • Power piping – Steam electric generation stations; industrial and institutional plants; central and district heating plants.

  • Refrigeration piping.

  • Petroleum – Petroleum refinery piping; loading terminal; gas metering; main and service lines; bulk plant and compressor stations compounding plant; storage facilities; gas pipelines.

  • Agricultural/chemical – Alkylation/carboxylation; dehydration/halogenation; condensation/cyclization; other complex chemical conversions.

ANSI 300 & 600 Pressure Class Sight Flow Indicators

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