1.5″ Tri-Clamp Sanitary In-Line Sight Glass | SUS316 Straight Flow Indicator

  • 【360° Unobstructed Flow Monitoring】 Features a full-bore, straight-through design that provides an unobstructed, 360-degree visual inspection of fluid flow, clarity, and color in real-time. Can be installed in both vertical and horizontal positions.

  • 【Premium Food-Grade SUS316 Material】 Constructed from high-purity SUS316 stainless steel with a high-polish finish. Excellent corrosion and rust resistance, fully complying with sanitary standards for hygienic piping systems.

  • 【Tempered Glass & High-Temp Gaskets】 Equipped with high-strength tempered pyrex glass and food-grade silicone (or optional PTFE/EPDM) seals. Reliably handles operating pressures up to 120 PSI and temperatures up to 300°F (149°C).

  • 【Quick-Install Tri-Clamp Connection】 Designed with standard 1.5″ Tri-Clamp (Clover Type) ends (Ferrule OD: 50.5mm). Allows for rapid, tool-free installation, quick disassembly, and easy CIP (Clean-in-Place) cleaning processes.

  • 【Hygienic Industry Applications】 Engineered specifically for high-sanitary compliance requirements. Widely trusted and used by engineering partners in the beer brewing, wine, dairy, food processing, beverage, and pharmaceutical industries.

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High-Purity Sanitary In-Line Sight Glasses for Hygienic Processing

Fanovo’s sanitary in-line sight glasses are engineered to provide direct, 360-degree visual observation of fluid flow, clarity, and processes within hygienic piping systems. Specifically designed for high-purity industries such as food processing, dairy, beverage, craft brewery, cosmetics, and biopharmaceuticals, these sight glasses ensure maximum safety and process control.

Unlike conventional industrial sight glasses that rely on threaded joints (which harbor bacteria and create dead legs), our sanitary sight glasses utilize Tri-Clamp (Clover Type) or Weld-on ends. This clean-in-place (CIP) compatible design eliminates crevices, ensuring an absolute sterile environment that meets strict hygienic standards.

Material Engineering & Technical Features

  • Premium Stainless Steel Body (SUS304 / SUS316L): Manufactured exclusively from high-grade SUS304 or SUS316L stainless steel. Highly polished to prevent contamination, offering superior corrosion resistance against aggressive CIP chemicals and sanitizers.

  • High-Strength Tempered Borosilicate Glass: Features heavy-wall, thermal-shock-resistant borosilicate glass windows. Offers crystal-clear visibility and excellent mechanical durability under elevated pressure and temperature cycles.

  • FDA-Approved Food-Grade Seals: Equipped with FDA-compliant Silicone, EPDM, or PTFE (Teflon) gaskets. Ensures zero leakage and prevents chemical leaching into the product stream.

  • Flexible Flow Indicator Options: To optimize visibility from a distance or track low-flow rates, we offer customizable internal indicators, including food-grade Rotor (Impeller) Indicators or high-visibility Ball Indicators.

  • Custom Engineering Support: As a dedicated B2B manufacturer, Fanovo can customize body lengths, protective stainless steel shields, seal materials, and connections to perfectly match your exact piping specifications.

 

Everything You Should Know About Peep Sight Custom Manufactured by Fanovo

 

 

Model Tri-Clamp Size Overall Height (H) Outer Diameter (D) Ferrule O.D. (D1) Max Pressure
FSG036-11″156 mm78 mm50.5 mm120 PSI (8.2 Bar)
FSG036-21.25″156 mm78 mm50.5 mm120 PSI (8.2 Bar)
FSG036-31.5″160 mm78 mm50.5 mm120 PSI (8.2 Bar)
FSG036-41.75″160 mm86 mm64.0 mm120 PSI (8.2 Bar)
FSG036-52″163 mm102 mm64.0 mm120 PSI (8.2 Bar)
FSG036-63″163 mm109 mm91.0 mm120 PSI (8.2 Bar)

We support customized overall lengths (H), alternative sanitary connection types (Weld-on, SMS/DIN Union, Flanged), high-purity material grades, and customized seal materials to meet your specific piping project demands.

 

No. Part Name Standard Material Optional Premium Material 
1Flow Body / FerrulesSUS316L Stainless SteelSUS304 Stainless Steel
2Glass WindowTempered Borosilicate GlassHigh-Temperature Quartz Glass
3Protective Pillars & NutsSUS304 Stainless SteelSUS316 Stainless Steel
4Sealing GasketFood-Grade Silicone (FDA)PTFE (Teflon) / EPDM / Viton (FKM)
5Cushion GasketPTFE (Teflon)Food-Grade Silicone

Operating Parameters & Standards

  • Connection End: Standard Quick-Release Tri-Clamp (conforms to ASME BPE / BS 4825).

  • Surface Finish: Internal polish Ra ≤ 0.8 μm (32 Ra) / Optional Ra ≤ 0.4 μm (15 Ra) Electropolished (EP) for high-purity pharmaceutical applications.

  • Maximum Operating Pressure: 120 PSI (8.2 Bar) @ 73°F (23°C).

  • Operating Temperature Range:

    • With standard Silicone Gasket: -10°C to +150°C (14°F to 300°F).

    • With optional PTFE/Viton Gasket: Up to +200°C (392°F).

  • Hygienic Compliance: All wet-part materials conform to FDA 21 CFR 177.2600 food-grade safety regulations.

Complies with Lead Free Plumbing Laws, NSF/ ANSI 61, UPC/ CE, ISO 9001

For approval information, please refer to the products specification sheet. For any other information on product certification and documentation information, please contact Fanovo.

FANOVO STATEMENT OF WARRANTY & LIMITATION OF WARRANTY

Fanovo warrants, to our all purchasers, that its products which are delivered to its purchasers will be the kind described in the order or price list and will be free of defects in workmanship or material for a period of two year from the date of shipping to you, our purchaser.

Should any failure to conform to this warranty appear within two year after the date of the initial delivery to our purchaser, Fanovo will, upon written notification thereof and substantiation that the goods have been stored, installed, maintained and operated in accordance with Fanovo’s recommendation and standard industry practice, correct such defects by suitable repair or replacement at Fanovo’s own expense. If any valve alleged to be defective, is reported to Fanovo headquarter in China, it will be examined and, if found to be defective under the warranty, it will be replaced at no charge in future order.

THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR OTHER WARRANTY OF QUALITY, WHETHER EXPRESS OR IMPLIED, EXCEPT THE WARRANTY OF TITLE AND AGAINST PATENT INFRINGEMENT Correction of non-conformities, in the manner and for the period of time provided above, shall constitute fulfillment of all liabilities of Fanovo to our purchaser, with respect to the goods, whether based on contract, negligence, strict tort or otherwise, it is the intention of Fanovo that no warranty of any kind, whether express or implied, shall pass through our purchaser to any other person or corporation.

LIMITATION OF LIABILITY: FANOVO SHALL NOT UNDER ANY CIRCUMSTANCES BE LIABLE FOR SPECIAL OR CONSEQUENTIAL DAMAGES SUCH AS, BUT NOT LIMITED TO, DAMAGES OR LOSS OF OTHER PROPERTY OR EQUIPMENT, LOSS OF PROFITS, OR REVENUE, COST OF CAPITAL, COST OF PURCHASED OR REPLACEMENT GOODS, OR CLAIMS OF CUSTOMERS OF OUR INITIAL PURCHASER. THE REMEDIES OF OUR INITIAL PURCHASER, AND ALL OTHERS, SET FORTH HEREIN ARE EXCLUSIVE, AND THE LIABILITY OF FANOVO WITH RESPECT TO SAME SHALL NOT, EXCEPT AS EXPRESSLY PROVIDED HEREIN, EXCEED THE PRICE OF GOODS UPON WHICH SUCH LIABILITY IS BASED.

Fanovo is not just innovative products—we also provide wide-ranging capabilities, including design, manufacturing, and distribution. Each of these capabilities, as well as others, can be scaled to your needs – you can use as much or as little as makes sense for your product development.

Our Strengths

  • Design/Prototyping
  • Manufacturing & Assembly
  • Custom Labeling & Packaging
  • Inventory Management
  • Continuous Improvement & Refinement

If you’re looking for an established, financially secure partner who offers robust quality systems, validated processes, continuous improvement strategies, and a proven track record, you’ve come to the right place. Contact us and we will show you the major breakthroughs OEMs have experienced with us.

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