Introducing our exceptional Sanitary Stainless Steel Four-Way/Straight-Through Flange Sight Glass - a marvel of engineering and design! Crafted meticulously to ensure the highest levels of durability and reliability, this sight glass is your ultimate choice for maintaining a clear visual on fluid flow. Its robust construction guarantees not only safety but also exceptional performance in the most demanding environments. Whether you're in the food, beverage, or pharmaceutical industries, our sight glass facilitates seamless operation, promising unparalleled corrosion resistance and long-lasting efficiency. Elevate your sanitary processing with our state-of-the-art sight glass solution today!
Product Description
1. Product Overview
The Sanitary stainless steel four-way/straight-through flange sight glasses are indispensable devices designed for effective observation in industrial pipeline systems. These sight glasses find extensive application in sectors such as petrochemical, pharmaceutical, food, and chemical industries. They facilitate real-time monitoring of liquids, gases, or vapors, allowing users to observe flow dynamics, color variations, and chemical reactions. Prominent features include:
- Sanitary Design: Boasting mirror-polished surfaces (Ra ≤ 0.8μm), these sight glasses meet stringent **GMP, 3A, and IDF standards**, perfectly suited for ultra-clean environments like food processing and pharmaceuticals.
- Corrosion Resistance: Expertly crafted from **SUS304, 316L, 2205 duplex steel**, with options for fluoropolymer-lined or FRP materials, they excel in harsh chemical environments.
- Structural Versatility: Available in versatile four-way (360° observation) and straight-through models, these sight glasses adapt seamlessly to various installation scenarios.
2. Technical Specifications
1. Materials
- Body: Made from 304, 316L, 2205 duplex steel, and 904L stainless steel for durability and longevity.
- Window: Utilizes tempered borosilicate glass (≤280°C) or quartz glass (≤1000°C), pressure-rated to withstand 0.6-2.5 MPa.
- Seals: Options include NBR, PTFE, or graphite gaskets tailored for high-temperature applications.
2. Operating Conditions
- Temperature Range:
- Stainless steel body: Capable of withstanding -196°C to +600°C.
- Glass window: Quartz glass allows temperatures up to 1000°C.
- Pressure Range: Standard pressure range of 0.6-2.5 MPa, customizable up to 10 MPa with quartz options.
3. Dimensions & Standards
- Port Sizes: Available in DN20-DN200, with customization options to suit specific needs.
- Flange Standards: Compatible with HG, GB, ANSI, JIS, DIN standards, in accordance with **Chemical Industry Standards HGJ501-502-86**.
3. Core Structure & Features
1. Components
- Comprising a base plate, viewing window, sealing gaskets, flanges, and fasteners for robust assembly.
- The four-way type offers multi-angle monitoring; the straight-through model is ideal for linear pipelines.
2. Functional Advantages
- Leak-proof Sealing: Equipped with RF and MFM flange faces designed for high-pressure environments.
- Thermal Shock Resistance: Built to withstand sudden temperature changes of up to 60°C.
- Easy Maintenance: Featuring a quick-disassembly design, minimizing downtime and facilitating swift maintenance.
4. Applications
- Chemical Industry: Effectively monitors corrosive media such as acids and alkalis to prevent crystallization or blockages.
- Pharmaceutical & Food: Ensures transparency and hygiene within sterile pipelines, ideal for drug solutions and dairy products.
- Energy & Environmental: Efficiently tracks high-temperature steam, oils, or wastewater within treatment systems.
5. Installation & Maintenance Guidelines
1. Installation
- Clean the glass using alcohol wipes and avoid acidic cleaners to maintain clarity and integrity.
- Ensure bolts are tightened diagonally and evenly to prevent any risk of glass cracking.
- For high-temperature environments, use graphite gaskets, or opt for PTFE in cryogenic conditions.
2. Maintenance
- Regular inspection of the glass for signs of corrosion is essential, with more frequent checks in harsh environments.
- Replace glass only if sealing surfaces remain intact to ensure leak-proof operation.
Product Parameters
Steel Parts |
SS304;SS316L |
The material of glass |
silicon boride glass |
Sealings |
EPDM or NBR or PTFE |
Working temperature |
-20~+135'C(when the sealing isEPDM |
Detailed Photos








Packaging & Shipping

Certifications

About US





FAQ
Q:How do you pack?
A:Plastic bags-------(Paper boxes)-------Cartons-------Plywood cases
Q:How long is the quality guarantee period?
A:We supply 6 to 12 months for quality guarantee according to customers' using frequency.
Q:How can you guarantee the quality of products?
A:First of all, we have the numerical control device to manufacture products accurately. Then our quality inspectors will test products one by one to make sure every flange or fitting we sell is qualified.
Q:How can I check your factory situation while it's difficult for me to come to China.
A:We have photos and videos on our website, It shows every step of the manufacturing.
Alternatively, I can take videos or photos of our factory and send them to you.
Q:What is your lead time?
A:It's around 15 days normally. If we have the products in stock, it will be about 5days.
Q:Can you print our Logo on the valves/Fittings?
A:Yes, we can totally produce products according to your this kind special request, even manufacture it based on your drawing
Q:Are samples available to be sent with free?
A:It depends on what product you need. There are hundreds of products we sell. You can contact us for particular answer.
Q:Do you have a minimum quantity of the products?
A:No, we will build business with you with even 1pc. We believe this cooperation will be a long-term relationship for our high quality, competitive price and good after-sale service.
Q:Where are the main markets for your products?
A:We hope to make business with companies from all over the world. And for now, our flanges and fittings have been exported to especially in North America, South America, South Asia, Europe and Middle East.
Q:Are you a factory or trading company?
A:We are a factory specialized in manufacturing flange and fitting over 10 years.