HPFlap, Inc.
HPF, Inc.
13540 Indian Creek
Cleveland, Ohio 44130
Tel: 440-816-2195
Fax: 440-816-2196

Sight Windows

Sight Window Standard Features

  • Exclusive 3-Year, "No Leak" Guarantee
  • Innovative radial sealing design is guaranteed against leakage for 3 years.
  • 300psi ANSI Service Ratings
  • No Maintenance
  • 48 Hour Shipping On Most Items
  • Available in Flat Weld Pad or Weld Neck Versions
  • Annealed Borosilicate Window
  • Sizes: 4"
  • Large 4" Viewing Area
  • Standard Alloys
  • Carbon Steel
  • 316 Carbon Steel
  • Full-View Sight Flow Indicators

    Full View Sight Flow Flanged

    1700 Series-Low Pressure

    OPW's 1700 Series Full-View Indicators are recommended for applications which require maximum Visibility with minimal pressure drop.

    Designed to carry 70, 120, and 150 psi ratings, the 1700 series is available in both flanged and are threaded designs. Impact deterrent shields standard on all units.

    Full View Sight Flow Threaded

    Flanged and Threaded Full-View Standard Features

  • Impact Deterrent Shields
  • Shatter-resistant shields are standard.
  • Dimensionally Interchangeable
  • Every Full-View features end-to-end dimensions that match Jacoby-Tarbox Penberthy and other manufacturers' units.
  • Minimal Flow Restriction and Pressure Drop
  • 360° Viewing Area
  • Indicator Styles
  • Plain-Provides a transparent pipe segment to detect the presence or absence of solutions, or to observe fluids for turbulence, color, or clarity.
  • Drip Tube-Mounted vertically, provides 360 viewing of very low or intermittent flow rates.
  • Borosilicate Cylinders
  • Standard Sizes
  • Flanged Units: 1" - 4"
  • Threaded Units: 1/8" - 2"
  • Standard Alloys
  • Carbon Steel
  • 316 Stainless Steel
  • Sight Flow Indicators

    Sight Flow Indicator Flanged

    Sight Flow Indicator Threaded

    1400 Series

    Standard Pressure/Standard Temperature

    1500 Series

    High Pressure/High Temperature

    VISI-FLO sight flow indicators provide a quick, reliable, and economical way to verify flow and monitor color and clarity in fluid lines. Several sizes, styles and materials are available for a wide range of industrial applications

    All VISI-FLOs carry full ANSI ratings to ensure maximum reliability in harsh operating conditions.

    Flanged and Threaded VISI-FLO Standard Features

  • Exclusive 3-Year, "No Leak" Guarantee
  • VISI-FLO's innovative radial sealing design is so good - it's guaranteed not to leak!
  • Full ANSI Service Ratings
  • Up to 400psi
  • Maintenance-Free Design
  • Independently bolted glass retainers eliminate the need for tie-rods or retaining rings, and eliminate the need for routine torquing maintenance.
  • Dimensionally Interchangeable
  • Flanged VISI-FLO's feature end-to-end dimensions that match Jacoby-Tarbox, Penberthy and other manufacturer's units.
  • Rated For Full-Vacuum Service
  • 4 Indicator Styles
  • Propeller-Ideal for observation from a distance.
  • Bi-Directional Flapper-Indicates both flowand direction.
  • Bi-Directional Plain-When color and clarity are of prime importance.
  • Drip Tube-For vertical lines; Ideal for gravity, low flow applications.
  • Standard S
  • Flanged Units: 3/4" - 12"
  • Threaded Units: 1/4" - 2"
  • Standard Alloys
  • Carbon Steel
  • 316 Stainless Steel
  • Ductile Iron
  • Brass
  • Visi-Flo is a registered trademark of OPW Engineered Systems

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