Sight Glasses & Sight Flow Indicators

Sight Glass

With our strong technical background in process observation and control, Papailias Incorporated is an industry-leading manufacturer of standard and custom sight glasses and sight flow indicators. In addition to our standard product line, we offer custom solutions for observing the flow and characteristics of various media in vessels or pipelines. Using innovative technologies, we manufacture high quality products that provide a window through which engineers and technicians can view and monitor sealed processes even while under extreme pressure and temperature conditions.

We engineer and build custom products that meet the requirements of nonhazardous, hazardous, and sanitary applications. Custom configurations can include integrated light sources to provide lighting and viewing through a single port. Other options include explosion proof construction, ASME code vessel compliance, quick opening capabilities, double window assemblies for an extra layer of reliability, and many, many more.

All of our products are manufactured from the highest quality materials. We offer numerous choices to ensure that the housing, seal, and lens construction is compatible with your operating temperature, pressure, and optical transmission requirements. Our engineering staff is available to assist you with design considerations, material selection, and any other aspect of your application.

The Papailias name is synonymous with quality. We manufacture products that allow clear visual inspection of process conditions under the most challenging conditions. Our products are tested to the extreme to ensure safety and reliability in your specific process application. With customers in a wide range of industries, including military, chemical, pharmaceutical, cosmetics, food/dairy, wastewater treatment, and power generation, we are the most trusted name in the sight glass industry.

Contact us directly to discuss your custom sight glass and sight flow indicator needs.

Capability Details

Sight Glasses
Circular
  • Series NW
  • Series NW-BW, NW-FT and NW-RF
Quick Opening
  • Series LQSC & QSG
Special Features
  • NW-R [Curved] & NW-DW [Double Window ]
Sanitary
  • Series SVTC
Rectangular
  • Series RS
  • Series RS-OB
BoroAlloy
Body Material
Carbon Steel
Stainless Steel
Nickel Alloy
Any machinable material
Gasket Material
Neo-prene
Teflon®
VITON®
EPDM
Silicon rubber seal gaskets
Other material available upon request
Unit Size
Variable
Features
  • Lighting Fixtures Meet Requirements for Hazardous and Nonhazardous Locations
  • Various Light/Sight glass design provide lighting and viewing through a single port
  • Numerous combinations of lightning and sanitary sight glasses
  • Sight glasses are suited for use in code vessels
  • Various light fixtures feature UL approval for hazardous or nonhazardous locations
  • Customized configurations are available for customers with unique requirements
Sight Flow Indicators
Standard
  • Series FIF
  • Series FIS
High Pressure
  • Series FIS/HP
  • Series FIF/HP
Full View
  • Series LIF
  • Series LIS
  • Series LIG
PTFE Lined
  • Series FIF/PTFE
  • Series LIF/PTFE
  • Series LIG/PTFE
Sanitary
  • Model SIC
Body Material
Bronze
Carbon Steel
Stainless Steel
Ductile Iron
Hastealloy
Teflon® Lined
Other
Lens Retainer Material
Carbon Steel
Stainless Steel
Ductile Iron
Other
Lens Material
Borosilicate glass
Soda Lime glass
Polycarbonate
Acrylic
Quartz
Other
Gasket Material
Neoprene
Teflon
EPDM
Viton
FEP Jacketed
Other
Production Volume
Specialty Production Shop
Prototype
Low Volume
Small Run
High Volume
Large Run
Long Run
Large Scale Production Volume Run
Typical Lead Times
In-stock to 6 Weeks

Additional Information

Industry Focus
Aerospace
Agricultural
Chemical
Defense/Military
Food and Beverage
Pharmaceutical
Industrial
HVAC
Heating, Ventilation and Air Conditioning
Marine
Medical
Industry Standards
ANSI - American National Standards Institute
ASME - American Society of Mechanical Engineers
ASTM - American Society for Testing and Materials
AWS - American Welding Society
CSA - Canadian Standards Association
FDA - Food And Drug Administration
Mil-Spec - Military Specifications
File Formats
AutoCAD (DWG,DWZ)
BMP - Bit Mapped Graphics
DXF - Drawing Interchange Format, or Drawing Exchange Format
GIF - Graphics Interchange Format
JPG or JEPG - Joint Photographic Experts Group
PDF - Portable Document Format
TIFF - Tagged Image File Format

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