Quartz flange ring sealing gasket

Quartz flange ring sealing gasket is a precision sealing element made of high-purity quartz (SiO ₂) fiber or quartz composite material. It is designed for flange connections under extreme temperature, strong acid and alkali corrosion, and high purity requirements. It can effectively prevent medium leakage and withstand sudden temperature changes. It is an indispensable sealing accessory in the fields of semiconductors, photovoltaics, chemical and analytical instruments.

Product FAQ: Your Core Concerns

Q1: In high-temperature environments, ordinary metal or PTFE gaskets are prone to deformation and aging, leading to leakage. Can quartz gaskets solve this problem?

A: Absolutely possible. Our quartz flange gasket has an extremely low coefficient of thermal expansion and excellent thermal shock resistance. Even in high temperatures above 1000 ℃ or severe alternating cold and hot environments, it can maintain dimensional stability and will not fail due to thermal fatigue.

Q2: I need to seal high-purity strong acid (such as sulfuric acid, nitric acid) or strong alkali media. How can I avoid gasket contamination of the product?

A: Quartz has extremely high chemical stability and hardly reacts with any acidic substances except hydrofluoric acid and hot phosphoric acid. Our product has a purity of over 99.99% and will not precipitate impurities in harsh chemical environments, perfectly protecting the cleanliness of your process fluids.

Q3: My flange is non-standard or has a very special size. Can you provide customization?

A: We are a professional custom manufacturer. Whether you have standard ANSI/DIN flanges or completely irregular non-standard equipment interfaces, we can provide full-size customized services from inner diameter, outer diameter to thickness based on your drawings or samples.

Why choose quartz material?

1. Extreme temperature resistance performance

The use temperature range of quartz material is extremely wide, with a long-term working temperature of up to 1100 ° C and even up to 1400 ° C in the short term. Its extremely low coefficient of thermal expansion (about 5.5 × 10 ⁻⁷/℃) ensures the dimensional stability of the gasket at high temperatures.

2. Excellent corrosion resistance

Except for hydrofluoric acid, quartz has excellent resistance to almost all inorganic acids, organic acids, and halogen gases. In semiconductor wet etching and chemical distillation towers, it can easily cope with the erosion of strong corrosive media such as aqua regia and concentrated sulfuric acid.

3. High purity and pollution-free

For photovoltaic (polycrystalline silicon reduction furnace) and semiconductor (diffusion furnace, oxidation furnace) processes, any trace metal contamination can lead to product scrap. The quartz flange ring gasket we provide has high purity and does not release pollutants at high temperatures.

4. Strong resistance to thermal shock

Quartz material can withstand drastic temperature changes (such as rapidly dropping from 1000 ℃ to room temperature) without explosion or cracking, making it particularly suitable for CVD equipment and vacuum sintering furnaces that require frequent temperature rise and fall.

What tricky problems can we solve?

-Leakage caused by thermal expansion and contraction: Solved the problem of looseness caused by inconsistent thermal expansion coefficients between flanges and bolts.

-Penetration of strong corrosive media: solves the problem of ordinary rubber or asbestos gaskets being corroded and carbonized in strong acids.

-High cleanliness requirement: Solved the metal ion contamination caused by impure gasket material, ensuring semiconductor yield.

-Excessive installation stress: Quartz gaskets have a certain compression rebound rate, which can compensate for the micro unevenness of the flange surface and ensure uniform stress on the sealing surface.

Why choose us?

1. Source manufacturer, flexible customization: We have many years of experience in quartz deep processing and support customization based on drawings. We can accurately process whether the thickness is 0.5mm or 5mm, and whether the shape is circular or irregular, with a tolerance controlled within ± 0.1mm.

2. Strict quality control and raw material guarantee: We use high-purity quartz material, and each gasket undergoes strict size and appearance inspections before leaving the factory to ensure no broken edges or air holes.

3. Rapid response and global shipping: For urgent repair needs, we provide expedited production services and deliver them quickly to customers worldwide through international logistics.

Customer Application Cases

Case 1: Flange sealing of semiconductor diffusion furnace

-Customer requirement: The flange of the horizontal diffusion furnace mouth of a semiconductor front-end manufacturer has a working temperature of up to 1200 ° C and requires frequent opening. The original high-temperature rubber ring had a very short lifespan, and the high-temperature volatiles affected the cleanliness of the furnace, resulting in "smoke" defects on the wafer.

-Solution: We have customized high-purity quartz flange ring sealing gaskets for our customers, using a special grinding process to treat the surface and ensure the fit when in hard contact with the metal flange.

-Final effect: After replacing the quartz gasket, the sealing life is extended from the original 1 week to over 6 months. The particle size index in the furnace significantly decreased, and the product yield increased by 3%. The frequency of customer equipment maintenance has significantly decreased, resulting in a significant improvement in production efficiency.

Case 2: High temperature concentrated sulfuric acid conveying system for fine chemical industry

-Customer requirement: A chemical enterprise often experiences pipeline temperatures exceeding 200 ° C when transporting 98% concentrated sulfuric acid. Traditional PTFE filled gaskets suffer from severe creep and relaxation at this temperature, leading to frequent flange interface leaks and posing significant safety hazards.

-Solution: We recommend and customize thickened quartz fiber composite flange gaskets, which utilize the acid resistance and high-temperature creep resistance of quartz to solve this stubborn problem.

-Final effect: After running continuously for one maintenance cycle (about 1 year), there are no signs of leakage at the flange interface, and the bolt torque does not need to be tightened again, completely solving safety hazards and reducing losses from unplanned parking for the enterprise.

Specification parameters and customization scope

Main material: high-purity quartz (SiO ₂ content ≥ 99%)

Working temperature: -50 ° C to+1100 ° C

Hardness: Moderate Shore hardness, combining rigidity and a certain degree of compressibility

Standard thickness: 1.0mm, 1.5mm, 2.0mm, 3.0mm (customizable)

Customized size: Outer diameter Max: ≤ 800mm; Minimum inner diameter: ≥ 5mm

Regarding the specific dimensions and operating requirements of your equipment flange, please feel free to provide us with drawings or technical parameters at any time. Our engineering team will recommend the optimal quartz flange ring sealing gasket solution for you and provide you with a quotation.  

Luverre Quartz manufactures and sells a wide range of high quality fused quartz glass, including fused quartz tubes, fused quartz plates, fused quartz rods, fused quartz windows, fused quartz crucibles, fused quartz boats, fused quartz flanges, fused quartz beakers, fused quartz glass instruments, and more. We can meet all kinds of customized requirements for fused quartz glass products.

For more information, please feel free to contact us.

Why choose us?

1.We are more experienced.

We have over 19 years production experience of quartz items.

2.We are more efficient.

We reply customers’ requests within 24 hours and we have high efficient production, engineers and sales team.

3.Our quality is more guaranteed.

We control the quality from quartz lumps to quartz sand and then quartz products, we have better and stricter quality control than other manufactures.

4.We are able to produce more difficult quartz products.

We have large grinding platforms and precision etching machines which enable us to manufactures and sells a wide range of high quality quartz glass, including quartz tubes, quartz plates, quartz rods, quartz windows, quartz crucibles, quartz boats, quartz flanges, quartz beakers, quartz glass instruments, and more.

5. About 20 years of professional experience

-Focusing on the manufacturing of quartz products for a quarter century

-The average working experience of the technical team exceeds 15 years

6.Global Service Network

-Our products are exported to over 40 countries and regions including Europe, America, Japan, South Korea, and the Middle East

-Multi language technical support (English, German, French, Spanish, Russian, Japanese)

7. Flexible cooperation mode

Support small batch trial orders, medium - and long-term cooperation, and urgent production for urgent orders, providing OEM/ODM services.