industrial grade flange gaskets
Have you experienced the cost of seal failure?
Do flange gaskets frequently fail prematurely under high temperatures and pressures or in corrosive environments, resulting in unplanned shutdowns?
After installing the flange gasket, do you still need to spend a lot of time adjusting the bolt torque over and over again, which increases the maintenance cost?
Do you have difficulty in selecting the most suitable flange gasket due to the lack of professional technical support in the face of complicated working conditions?
Let Xin Industrial Seal King help you!
With over 20 years of experience in sealing technology, we understand that every industry and every application has unique sealing requirements. From material selection and dimensional design to installation guidance, we provide comprehensive technical support to ensure you choose the most suitable gasket solution.
Our engineering team has extensive field experience and is capable of providing customized sealing designs for harsh operating conditions, such as high temperatures, high pressures, and corrosive media. Whether in petrochemical refining, chemical processing, power generation, or the food and pharmaceutical industries, we have a proven track record of successful applications and comprehensive technical data to support our solutions.
Chengxin's Advantages
Guaranteed quality ingredients
Precision Manufacturing
Professional Technical Support
Improve Inventory Supply
Flange Gasket Product Line
Chengxin offers a wide variety of flange gaskets designed to meet a range of industrial challenges. Whether in extreme environments or for precision applications, we provide reliable sealing solutions to ensure the safe and efficient operation of equipment.
Semiconductor Valve Cover Seals
Designed specifically for high-purity semiconductor environments, it offers exceptional chemical resistance and ultra-low leaching rates, ensuring contamination-free manufacturing processes. Precision machining meets cleanroom standards, ensuring stable equipment operation and product quality.
High-Pressure Flange Seals for the Petrochemical Industry
We provide ultra-durable, weather-resistant flange gaskets designed for the high-temperature, high-pressure, and corrosive operating conditions found in the petrochemical industry. These gaskets effectively prevent leaks, extend equipment service life, and enhance production safety and efficiency.
Sealing Gaskets for Equipment Tube Sheets
Used for sealing tube sheets in heat exchangers, pressure vessels, and other equipment. It can withstand extreme temperature fluctuations and media corrosion, providing excellent thermal stability and long-lasting sealing performance to ensure stable operation of equipment under harsh conditions.
Product specifications and technical parameters
Chengxin Industrial offers a diverse range of static O-rings to meet the demanding requirements of applications ranging from general industrial use to extreme conditions. Our comprehensive product lineup—from standard sizes to custom solutions—strictly adheres to international quality standards, ensuring you receive the most reliable sealing components.
| Material | Hardness (Shore A) | Temperature Range (°C) | Pressure Range (bar) | Key Features |
|---|---|---|---|---|
| NBR (Nitrile Rubber) | 70-90 | -30 to 120 | Up to 100 | Excellent resistance to oil and fuel; highly versatile |
| FKM (Fluorinated Rubber) | 70-90 | -20 to 200 | Up to 200 | Excellent resistance to high temperatures and chemical corrosion |
| EPDM (Ethylene-Propylene-Diene Monomer) | 70-80 | -40 to 150 | Up to 150 | Excellent resistance to weathering, ozone, steam, and acids and alkalis |
| FFKM (Perfluoroelastomer) | 70-85 | -25 to 300+ | Up to 250+ | Exceptional chemical and heat resistance, suitable for the most demanding environments |
We are committed to ensuring that every O-ring delivers optimal performance in its specific application. If you have special requirements or are unsure how to select the most suitable material and specifications, please contact Chengxin’s team of experts; we will provide detailed technical consultation and customized services.
Successful application cases in various industries
Petrochemical refining industry
After a large refinery adopted our metal-wound gaskets, flange leakage incidents were reduced by 85%, and annual maintenance cost savings exceeded $3 million.
Employment:
- Medium: Crude oil, light oil
- Temperature: 280-350°C
- Pressure: PN100-PN150
Chemical Process Industry
Chemical plants use PTFE-coated gaskets in strong acid and alkali piping systems, which perfectly solves the sealing problem of corrosive media and extends the service life by 3 times.
Employment:
- Medium: Sulfuric acid, hydrochloric acid
- Temperature: room temperature to 150°C
- Pressure: PN16-PN40
Power Generation Industry
Expanded graphite gaskets are used in high-temperature steam lines in thermal power plants to effectively withstand thermal cycling shocks and ensure long-term stable operation.
Employment:
- Medium: Superheated steam
- Temperature: 450-550°C
- Pressure: PN250-PN420
Testimonials
We have been using your metal-wound gaskets in the piping system of our high-temperature cracker for more than two years without any leakage problem. Not only the quality of the product is excellent, but also the professionalism of the technical support team is impressive, and they can provide the most suitable solutions for our special working conditions.

Taiwan Petrochemical Corporation Equipment Manager
In the past, we were often troubled by flange leakage problems, which not only affected production but also increased maintenance costs. After changing to your recommended expanded graphite gaskets, the leakage incidents have been greatly reduced, and the maintenance workload has also been significantly reduced. More importantly, the installation training you provided enabled our technicians to master the correct construction methods.

Maintenance Supervisor of a chemical plant
Sealing in high temperature steam systems has always been a challenge for us, as traditional gaskets often fail due to heat cycling. Using your high-temperature gasket solution not only extends the service life, but also improves the reliability of the overall system. The professional after-sales service gives us peace of mind.

Power Plant Engineer
Choose Chengxin, Choose Peace of Mind
01Professional Consultation
Our engineers will provide a free assessment of your application needs and recommend the most suitable solution.
02Sample Testing
We will provide samples for actual testing to verify that their performance meets your expectations.
03Rapid delivery
We’ll quickly arrange production after your order is confirmed to ensure your project stays on schedule.
04Installation Support
Detailed installation instructions and live online support
05Ongoing Services
Long-term technical support and regular follow-ups ensure the system runs smoothly
Cheng Hsin Seal King not only provides high quality products, but also emphasizes the long-term cooperation relationship with customers. Our technical team is always on standby to assist you in solving all kinds of sealing-related technical problems, ensuring that your equipment always maintains the best running condition.
Get Started on Your Sealing Upgrade Plan Today
Let Chengxin Sealing King help you solve your sealing challenges
No matter what sealing challenges you face, Chengxin Sealing King can provide professional solutions. Our technical team is always ready to assist you, offering comprehensive support from needs analysis to product delivery.
Contact us now to take advantage of the following offers: