Introducing our Sanitary Stainless Steel Four-Way/Straight-Through Flange Sight Glass, a marvel in design and functionality, ensuring reliable performance and unparalleled safety. Crafted for optimum visibility and durability, this sight glass is an essential component for a range of sanitary applications, offering a seamless blend of innovation and robust engineering.
Product Description
1. Product Overview
The Sanitary Stainless Steel Four-Way/Straight-Through Flange Sight Glasses from Wenzhou Safety Stainless Steel Co., Ltd. stand as pivotal observation devices tailored for diverse industrial pipeline systems. Renowned for their application across petrochemical, pharmaceutical, food, and chemical sectors, these sight glasses ensure precise real-time monitoring of liquid, gas, or vapor flow, color changes, and reactions. Notable attributes encompass:
- Sanitary Design: Boasting mirror-polished surfaces (Ra ≤ 0.8μm), these sight glasses uphold the strictest of sanitation standards, including GMP, 3A, and IDF, making them ideal for high-cleanliness environments such as pharmaceutical and food production.
- Corrosion Resistance: Expertly crafted from high-grade SUS304, 316L, 2205 duplex steel, with options for fluoropolymer-lined or FRP materials, ensuring robust resistance in aggressive chemical media.
- Structural Versatility: Offered in both four-way (360° observation) and straight-through designs, these devices seamlessly adapt to a variety of installation demands.
2. Technical Specifications
1. Materials
- Body: Constructed from premium 304, 316L, 2205 duplex, and 904L stainless steel, ensuring durability and resilience.
- Window: Choose between tempered borosilicate glass for temperatures up to 280°C or quartz glass for extreme conditions up to 1000°C, with a pressure capacity ranging from 0.6 to 2.5 MPa.
- Seals: Available with NBR, PTFE, or graphite gaskets, accommodating high-temperature applications with ease.
2. Operating Conditions
- Temperature Range:
- Stainless steel body: Capable of operating between -196°C to +600°C, demonstrating expansive thermal adaptability.
- Glass window: Resilient up to 1000°C when utilizing quartz, catering to demanding heat conditions.
- Pressure Range: Standard operating pressures span from 0.6 to 2.5 MPa, with customization options extending up to 10 MPa for quartz-equipped models.
3. Dimensions & Standards
- Port Sizes: Available in standard sizes ranging from DN20 to DN200, with custom dimensions available to meet specific requirements.
- Flange Standards: Conforms to a wide array of flange standards including HG, GB, ANSI, JIS, and DIN, in alignment with Chemical Industry Standards HGJ501-502-86, ensuring universal applicability.
3. Core Structure & Features
1. Components
- Comprising a robust base plate, precision viewing window, durable sealing gaskets, flanges, and secure fasteners, ensuring a comprehensive assembly.
- The four-way model allows for comprehensive multi-angle monitoring, while the straight-through version is perfectly suited for linear pipeline applications.
2. Functional Advantages
- Leak-proof Sealing: Featuring RF and MFM flange faces, these sight glasses are designed for flawless performance in high-pressure settings.
- Thermal Shock Resistance: Designed to withstand sudden temperature shifts of up to 60°C, ensuring reliability amidst dynamic conditions.
- Easy Maintenance: Engineered with a quick-disassembly design, significantly minimizing downtime during maintenance procedures.
4. Applications
- Chemical Industry: Expertly monitors corrosive media including acids and alkalis, proactively preventing crystallization or blockages.
- Pharmaceutical & Food: Guarantees transparency and maintains hygiene in sterile pipelines, crucial for products like drug solutions and dairy.
- Energy & Environmental: Efficiently tracks high-temperature steam, oils, or wastewater in treatment systems, ensuring optimal operational oversight.
5. Installation & Maintenance Guidelines
1. Installation
- Ensure the glass surface is impeccably clean using alcohol wipes; avoid using acidic cleaners to maintain glass integrity.
- Bolts should be tightened diagonally and evenly to avert glass cracking and ensure a secure installation.
- For high-temperature settings, employ graphite gaskets, while PTFE is recommended for cryogenic environments to optimize performance.
2. Maintenance
- Conduct regular inspections for possible corrosion of the glass, increasing frequency in harsh conditions to safeguard performance.
- Replace the glass only when sealing surfaces remain intact, to prevent potential leaks and ensure continuous functionality.
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.