Professional static flange and valve sealing solutions
Three Major Sealing Challenges
1. Frequent leaks
Unplanned downtime for units 60% and above is caused by seal failure.
2. High costs
A single leak can result in annual losses amounting to hundreds of thousands of yuan.
3. Difficulty in Selecting the Right Model
Wrong choices lead to repeated failures.
Let Xin Seal King help you
Chengxin Sealing King not only provides sealing products but is also an expert in one-stop solutions. We have a deep understanding of the challenges associated with sealing static flanges and valves. Drawing on our extensive experience and technical expertise, we tailor highly efficient and reliable sealing solutions for our customers. From precise product selection to best installation practices, we ensure the safe and stable operation of your equipment, significantly reducing the risk of leaks and maintenance costs while enhancing overall operational efficiency.
Why should you choose Bearing Seal King?
20 years of professional experience
Customized Design Capabilities
Fast Delivery Guarantee
Comprehensive technical support
Cheng Hsin Seal King - Offering a complete line of sealing products
Spiral Wrap Gasket
Metal Covered Spacer
PTFE Gasket Series
Graphite sealing material
Main Application Areas
For detailed product data sheets and material certificates, please refer to our official product catalog or contact a technical advisor.
Customer Testimonials
"In the three years we have been working with this supplier, the flange leakage problem at our plant has been almost completely solved. Their technical team is professional and responsive, and the quality of their products is consistent and reliable. This is our most reliable sealing partner."

- Maintenance manager of a large petrochemical plant
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:
Free Technical Consultation
Sample Testing Services
Quick Quote Delivery
Ready to get started?
Sealing Solutions for Static Flanges and Valves
From flange gaskets, O-rings, and backup rings to valve seat rings, we help you identify the appropriate sealing products and materials based on the medium, temperature, pressure, and equipment conditions.
Three Major Sealing Challenges
From leaks and maintenance costs to discrepancies in product selection, first clarify the operating conditions, then match them with the appropriate products and materials.
Frequent Leaks
Seal failure can lead to unplanned downtime and affect the stable operation of equipment.
Maintenance Costs
Repeated disassembly, reassembly, replacement, and shutdowns will continue to increase the maintenance burden.
Difficulty in Selecting a Model
Depending on the medium, temperature, pressure, and clearance, the product and material must be confirmed together.
Overview of Core Sealing Products
Quickly access existing product data within the system based on the sealing location and operating conditions.

Flange Gasket
Flat gaskets, PTFE, graphite, spiral-wound gaskets, and special flange sealing requirements.

O-Ring
Suitable for valves, equipment interfaces, and various static sealing locations.

Backup Ring
In high-pressure or wide-clearance applications, this is used to reduce the risk of O-ring extrusion.

Valve Seat Ring
Used for critical static sealing positions in ball valves, butterfly valves, and other valve components.

PTFE Static Seal
Suitable for corrosive media and sealing applications requiring good chemical compatibility.
Flange Gasket Product Line
Four common product categories, selected based on the actual medium, temperature, pressure, and flange conditions.

Spiral Wrap Gasket
High-temperature, high-pressure, steam, petrochemical, and industrial flanges.

Metal Covered Spacer
Flange seals requiring high mechanical strength and designed for special operating conditions.

PTFE Gasket
Acids, alkalis, solvents, and corrosive chemicals.

Graphite Gasket
High temperatures, steam, hot oil, and high-temperature pipelines.
Operating Conditions → Product Selection
First, narrow down the product range based on operating conditions; then finalize the specifications based on the drawings, dimensions, and equipment requirements.
| Terms of Use | View First |
|---|---|
| Corrosive media | PTFE Gasket/FFKM O-Ring |
| High Temperature and High Pressure | Spiral-Wound Gaskets / Graphite Gaskets |
| General-Purpose Flanges | Flat Gaskets / Metal-Clad Gaskets |
| Static Seals for Valves | O-Ring/Valve Seat Ring |
| Extrusion Risks | Backup Ring |
| Custom Sizes | Request a Quote for Custom Seals |
Main Application Areas
Quality and Delivery Processes
Ensure consistency between product selection and quotation information, from usage requirements to delivery confirmation.
Not sure about the specifications? Feel free to send us photos, your old parts, or drawings first.
Please provide the currently known equipment locations, media, and operating conditions, and Chengxin will assist in compiling the items for subsequent confirmation.
Customer Testimonials
"In the three years we've been working with this supplier, flange leakage issues at our plant have been almost completely resolved. Their technical team is professional and responsive, and their products are of consistent, reliable quality."
- Maintenance manager of a large petrochemical plant
Choose Chengxin, Choose Peace of Mind
Professional Consultation
Assess application requirements and determine the direction.
Sample Testing
Arrange sample verification as needed.
Rapid delivery
Production and delivery schedules will be arranged after the order is confirmed.
Installation Support
Provides information on product installation and use.
Ongoing Services
Ongoing technical support and usage tracking.
Start Assessing Your Sealing Needs
Please send drawings, dimensions, photos, or information about the old parts to help speed up the product and material confirmation process.