Stainless Steel Industrial High Pressure Transparent Flat Flange Sight Glass

• Customization: Available
• After-sales Service: All The Time
• Warranty: 1 Year
• Model NO.: ZT-FG0007
• Certification: SMS, DIN, Rjt, Idf,3A
• Shape: Cylindrical
• Head Code: Square
• Connection: Flange
• Material: Stainless Steel
• Production Period: in 15-60 Days Upon Order Quantity
• Payment Term: LC, T/T, Western Union, Small-Amount Payment
• Closest Port for Shipment: Ningbo
• Aftermarket: 1 Year
• Package: Cartons, Pallet, Cases
• Transport Package: Cartons, Pallet, Cases
• Specification: Vacuum to 10bar
• Trademark: ZT or Customized on demand
• Origin: China
• HS Code: 7307290000
• Production Capacity: 2000 Piece/Month
• Package Size: 20.00cm * 20.00cm * 20.00cm
• Package Gross Weight: 5.000kg

Product Description

Stainless Steel SS304 SS316/Vacuum/OEM/ODM Flange Sight Glass with Window Flange

is a professional of pipe fittings, valves, and flanges, serving industries including water treatment, construction, petrochemical, and oilfield. Equipped with an and modern factory, we strictly adhere to international to ensure superior performance in pressure resistance, and reliability. With , and , we are committed to providing stable and high-quality industrial piping solutions, striving to be your trusted long-term partner.

also offer ,,,,,, etc., after the products are completed, we recheck the roundness, thickness consistency, sand holes, and surface uniformity. After these inspections, the fittings are of outstanding quality.

Size Range	DN25-DN150/DN50-DN400
Connection Type	Quick-release, Thread, Welding, Flange
Material	304 / 316L
Glass Type	Tempered glass, Borosilicate glass
Pressure Range	0-10 bar (customizable higher)
Temperature Range	-20°C to 150°C (depending on glass and seal material)
Seal Material	EPDM, PTFE, Silicone
Optional Light	Optional LED light sight glass

	Tubular Sight Glass	Union Type Sight Glass	Flange-Type Viewing Sight Glass with LED	Sight Glass with Wiper
Specifications/ Sizes	Sizes 1"-4" (DN25-DN100); working pressure typically up to ~10 bar (150 psi)	DN40-DN80 typical (up to DN150 available); surface finish ≤0.8 μm Ra	Flanged mount (ANSI/DIN); pressure per nozzle class	DN50-DN150 common; pressure up to ~10 bar; temp up to ~150 °C; manual wiper clears viewing pane during operation.
Working Principles	Transparent borosilicate tube installed inline for continuous visual inspection of flow.	Threaded union clamps glass disc between male/female ends for sanitary pipelines.	Flanged sight window on vessel/nozzle, paired with LED light for illumination.	Rotary or reciprocating external wiper sweeps inner glass face to remove condensate/films.

Product Description

The stainless steel sight glass is a transparent observation device installed in pipelines or containers, designed for real-time monitoring of fluid flow, clarity, and process conditions. Its main body is constructed from highly corrosion-resistant stainless steel and features a high-strength glass window, which ensures both safety and durability in demanding environments. This device is widely used in sanitary industries such as food, beverage, pharmaceuticals, and biotechnology, where high standards of cleanliness, corrosion resistance, and visual monitoring are essential.

Working Principle

The stainless steel sight glass operates on a straightforward optical principle. Its high-strength glass window acts as a sealed viewing portal, allowing operators to directly visualize the interior of a vessel or pipeline. This enables real-time assessment of the fluid state, color, turbidity, and the presence of bubbles or contaminants without interrupting the process.

1.Corrosion Resistance

It offers strong corrosion resistance and is suitable for a wide range of industries, including food, chemical, petroleum, and water treatment.

2.High & Low Temperature Resistance

Resists high & low temperatures for various industries.

3.Process Visualization Window

Enables clear, real-time observation without interrupting the process.

4.Rugged & Durable Construction

Built with stainless steel and high-strength glass for long service life.

5.Reliable Sealing & Safety

Equipped with high-performance sealing to prevent leaks and ensure operational safety.

Certifications

Packing & Delivery

After Sales Service

Quality Assurance

24-hour online support

Professional Team Support

All products undergo rigorous inspection throughout production until pre-shipment. Additionally, we provide a 3-year quality warranty service. For any quality-related issues, please contact our service team, and we will provide solutions within 24 hours.

Our service team operates 24/7 to provide immediate responses to both after-sales product issues and new product inquiries. For special circumstances, we offer both online and on-site support services.

ZHITONG maintains a professional engineering team capable of providing both online and on-site services. With years of project experience, we offer expert advice for both standard and specialized projects.

Customer Comments

Company Profile

Wenzhou Zhitong Pipeline Industry Co., Ltd.

   Wenzhou Zhitong Pipeline Industry Co., Ltd. is a professional pipe fittings,valves and flanges manufacturer and exporter for water treatment, construction, petrochemical and oilfield industry. We deliver exceptional value by providing customers with the most important elements : Premium Quality, Reasonable Price and Impeccable Services.

    Zhitong Pipeline designs and builds a broad array of quality products in its ISO 9001 and CE manufacturing facility. Our products adhere to GB, JIS, DIN, DIN, EN, ANSI/ASME specifications for material content, pressure ratings and quality assurance, ensuring that our customers receive consistent quality and reliability every time. Additionally, we are able to modify existing products or manufacture new designs to meet specific requirements. 

1.Produced from wide range of equipment.
We have a wide range of equipment, including sandblasting machines, polishing machines, sawing machines, presses, and CNC machines, with nearly 150+ units in total.
 
2.Stress testing and performance testing.
Our products undergo multiple rounds of quality inspections—from raw material processing to production, and even after completion. Additionally, we have a dedicated product laboratory in the 3F workshop for enhanced quality control.

3.Design exploring
High Technology in design exploring and production workmanship
 
4.Customization
ZHITONG is a factory with a professional engineering team. We can customize products based on your provided drawings and also offer suggestions for your reference.
 
5.Extensive inventory
For conventional valves, pipe fittings and flanges, we keep substantial inventory to ensure the shortest possible delivery time.

Exhibition & Client Visit

Russia

Mexico

South Africa

Indonesia

Vietnam

Brazil

Client visit to the plant

Client visit to the plant

Client visit to the plant

FAQ

1. Are you a trading company or factory? 
We are a manufacturer boasting 15 years of industry experience and holding proprietary import-export rights.

2.May I request free samples?
Free samples can be provided for first cooperation under sincere cooperation. 

3.What certifications do you have?
Yes, we hold ISO, CE, and PED certificates. In addition, we possess a number of design patents and a Special Equipment Manufacturing License.

4.How do you control the quality? 
In quality control, the most critical aspect is preventing material mix-ups.
Our factory has installed multiple spectroscopic PMI analyzers in the raw material warehouse, production workshop, and dispatch area.
Equipment such as pressure testing machines, PMI analyzers, RA roughness testers, and hardness testers all contribute to ensuring quality. Additionally, we have our own laboratory and can provide extra test data for special products.
During the production process, dedicated inspectors conduct checks at different stages.
Furthermore, a specialized team of quality inspectors examines finished products to effectively prevent issues like quantity shortages, quality defects, and chemical mix-ups.

5.If there is any quality problem, how do you solve it? 
We believe that protecting our clients' interests is the cornerstone of our business. While we cannot guarantee 100% perfection, occasional quality issues may still arise.
Depending on the specific situation, we typically resolve such cases through replacements, compensation, or resending goods. The specific solution will be discussed and agreed upon with the customer based on the actual circumstances.

6. How long is your delivery time? 
For normal products in 7-10 days; For bulk order, in 15-25 days. It depends. 

7. Warranty time? 
3 years warranty for all of our stainless steel products. Gaskets or the easy broken parts are not included due to the different application for customers. 

8.Can you provide us with the testing report?
Yes, we can provide the required material reports, such as the material certificate, mill certificate, pressure testing report, roughness report, measurement report, and hardness report.