Sight Glasses
Stainless steel sanitary sight glasses provide clear visual observation of product flow through process piping without requiring the line to be opened or interrupted. Designed for industrial and hygienic applications, these assemblies combine corrosion-resistant stainless steel construction with borosilicate glass, acrylic, or polycarbonate viewing materials and a range of sanitary gasket and connection options.
Sanitary sight glasses are commonly used in food and beverage, dairy, pharmaceutical, biotechnology, cosmetic, brewing, and other process systems where visual monitoring of flow, product condition, or line cleanliness is important.
Key Benefits
Clear Process Visibility — Provides operators with direct visual confirmation of fluid movement, helping verify flow and identify changes in process conditions.
Non-Invasive Monitoring — Allows continuous observation of the process while maintaining a closed piping system, reducing the need for line disassembly.
Excellent Optical Clarity — Borosilicate glass provides clear visibility of process fluids, while acrylic and polycarbonate options offer alternative viewing solutions.
Compact Installation — Provides a dedicated viewing point without requiring a large footprint, making sight glasses suitable for space-conscious piping layouts.
Hygienic Construction — Stainless steel construction and sanitary connection designs support clean, controlled processing environments.
Serviceable Construction — Replaceable viewing elements, gaskets, and other components can simplify maintenance and help extend the useful life of the assembly.
Improved Process Control — Visual confirmation of flow can help operators troubleshoot equipment, monitor transfers, verify cleaning cycles, and identify potential process issues early.
Typical Applications
Process Piping Systems
Sanitary Process Piping
Water & Chilled Water Systems
Pump Systems
Heat Exchanger Systems
Cooling Tower Systems
Water Treatment Systems
Food & Beverage Processing
Pharmaceutical & Biotechnology Systems
Chemical Processing
HVAC & Refrigeration Systems
Industrial Manufacturing & Utility Systems
Construction & Materials
Body Material: 304 or 316L stainless steel
View Port Material: Borosilicate glass, acrylic, or polycarbonate
Gaskets: Buna-N, EPDM, FKM, PTFE, silicone
Connection Type: Weld end, tri-clamp, bevel seat
Sizes: 1/2 to 8 inch
Surface Finish: 30RA ID/OD, 20RA MP ID, 15RA EP ID
Performance Specifications
Maximum Working Pressure: Up to 145 psi, depending on configuration
Maximum Working Temperature: Up to 250°F (121°C), depending on configuration
Flow Rate: Cv ranging 10–800, depending on configuration
Quality & Compliance
Sanitary sight glasses are manufactured using controlled stainless steel materials, sanitary surface finishes, precision-machined components, and application-specific viewing and sealing materials to support reliable hygienic service. Depending on configuration, products may be supplied with material certifications, dimensional inspection, surface-finish verification, pressure testing, and documentation supporting applicable ASTM, ASME, FDA, 3-A, and other sanitary industry requirements.