Custom Rubber Flange Seal Manufacturer | Precision Rubber Flange Gaskets for Industrial Pipeline Sealing
A flange connection is only as reliable as the seal inside it. Even a small leak can lead to production downtime, pressure loss, equipment damage, or expensive maintenance. That's why choosing the right Rubber Flange Seal is critical for every piping system.
At Xiamen Jinshun Sealing Technology Co., Ltd., we have specialized in manufacturing custom rubber flange seals and precision rubber sealing products since 2002. We provide OEM and ODM sealing solutions for customers in water treatment, food processing, sanitary equipment, chemical processing, HVAC, machinery, automotive, marine, and industrial pipeline systems worldwide.
Whether you need a standard flange gasket or a fully customized sealing solution, our engineering team can manufacture according to your drawings, samples, or technical specifications. We support custom materials, custom diameters, custom thicknesses, and custom gasket profiles to ensure the best sealing performance for your application.
Manufactured under ISO 9001:2015 and ISO 14001:2015 quality systems, our materials comply with RoHS, REACH, PAHS, and selected compounds are available with FDA, NSF, WRAS, ACS, LFGB, KTW-W270, and UL approvals.
Why Choose a High-Quality Rubber Flange Seal?
Flange gaskets are designed to create a reliable seal between two bolted pipe flanges. When compressed correctly, the rubber material fills microscopic surface irregularities, preventing the leakage of:
- Water
- Drinking water
- Steam
- Compressed air
- Oil
- Hydraulic fluids
- Chemicals
- Gas
A high-quality rubber flange seal helps maintain system pressure, improves equipment reliability, and reduces maintenance costs over the long term.
Key Features of Our Rubber Flange Seals
- OEM & ODM manufacturing
- Custom materials available
- Custom sizes from DN15 to DN700
- Custom thickness and profiles
- Manufactured according to customer drawings or samples
- Excellent sealing performance under compression
- Resistant to cracking and deformation
- High compression recovery
- Excellent flexibility and durability
- Suitable for both low- and medium-pressure piping systems
- Long service life with minimal maintenance
Technical Specifications
| Item | Specification |
|---|---|
| Product Name | Rubber Flange Seal |
| Size Range | DN15 – DN700 |
| Shape | Round, Full Face, Ring Type, Customized |
| Material | EPDM, NBR, Silicone, FKM (Viton®), Neoprene, HNBR, Natural Rubber and more |
| Hardness | 40–90 Shore A |
| Thickness | Customized (1 mm–30 mm or according to drawings) |
| Temperature Range | -40°C to +230°C (standard materials) |
| Color | Black, White, Red, Blue, Transparent or Custom |
| Pressure Resistance | Suitable for low and medium pressure applications |
| Manufacturing | Compression Molding, Die Cutting, CNC Cutting |
| OEM & ODM | Supported |
| Certifications | ISO9001, ISO14001, RoHS, REACH, PAHS, FDA, NSF, WRAS (material dependent) |
Available Rubber Materials
Different working environments require different rubber compounds. Choosing the correct material is essential for sealing performance and service life.
| Material | Temperature Range | Main Advantages | Typical Applications |
|---|---|---|---|
| EPDM | -40°C to +150°C | Excellent weather, water and ozone resistance | Water treatment, HVAC, drinking water |
| NBR (Buna-N) | -40°C to +120°C | Excellent oil and fuel resistance | Hydraulic systems, machinery, automotive |
| Silicone | -60°C to +230°C | Excellent flexibility and food-grade options | Food equipment, medical devices |
| FKM (Viton®) | -20°C to +220°C | Outstanding chemical and heat resistance | Chemical plants, fuel systems |
| Neoprene | -40°C to +120°C | Good weather and abrasion resistance | Marine and industrial equipment |
| HNBR | -40°C to +150°C | High mechanical strength and wear resistance | Heavy-duty industrial machinery |
Our engineers can recommend the most suitable material based on your working temperature, pressure, fluid, and service environment.
Custom Manufacturing Services
Every sealing application is different. That's why we offer complete customization services.
We support custom:
- Inside diameter (ID)
- Outside diameter (OD)
- Thickness
- Hardness
- Material formulation
- Color
- Surface finish
- Full-face flange gaskets
- Ring flange seals
- Non-standard flange dimensions
- Special cross-sections
- Customer logo or identification marking
Simply send us your drawing, CAD file, or sample, and our engineering team will develop the most suitable sealing solution.
Manufacturing Advantages
With more than 20 years of rubber sealing manufacturing experience, Xiamen Jinshun combines advanced production equipment with strict quality control to deliver consistent sealing performance.
Our manufacturing capabilities include:
- Compression molding
- Precision die cutting
- CNC gasket cutting
- Rubber compound development
- Mold design
- Prototype production
- High-volume OEM manufacturing
Each production batch undergoes rigorous inspection, including:
- Dimensional measurement
- Hardness testing
- Compression set testing
- Tensile strength testing
- Visual inspection
- Material traceability
Typical Applications
Our custom rubber flange seals are widely used in:
Water Treatment Systems
Reliable sealing for potable water pipelines, RO systems, pumps, and filtration equipment.
Food & Beverage Processing
FDA-grade silicone and EPDM flange seals for hygienic processing equipment.
Chemical Processing
FKM and specialty elastomers for aggressive chemicals, acids, and industrial fluids.
HVAC Systems
Air duct, chilled water, and heating pipeline sealing.
Industrial Machinery
Compressors, pumps, valves, hydraulic systems, and processing equipment.
Marine & Shipbuilding
Corrosion-resistant flange gaskets for seawater and offshore equipment.
Municipal Pipeline Projects
Large-diameter flange seals for water supply, wastewater, and infrastructure applications.
Why Global OEM Customers Choose Xiamen Jinshun
Since 2002, Xiamen Jinshun Sealing Technology has become a trusted manufacturing partner for customers worldwide.
Our advantages include:
- Over 20 years of sealing manufacturing experience
- OEM & ODM capabilities
- Competitive factory-direct pricing
- Fast prototype development
- Custom material formulation
- Strict ISO-certified quality control
- International material certifications
- Stable production capacity
- Professional engineering support
- Fast global delivery
Our long-term partnerships with international customers are built on reliable quality, consistent performance, and responsive technical service.
How to Select the Right Rubber Flange Seal
Before choosing a flange gasket, consider these important factors:
| Selection Factor | Why It Matters |
|---|---|
| Operating Temperature | Determines the best rubber material |
| Working Pressure | Influences gasket design and thickness |
| Fluid Type | Ensures chemical compatibility |
| Flange Standard | Matches the correct dimensions |
| Indoor or Outdoor Use | Affects weather resistance requirements |
| Food or Drinking Water Contact | Requires FDA, NSF, or WRAS-approved materials |
| Service Life | Helps optimize material selection and total cost |
Selecting the right gasket improves sealing reliability while reducing maintenance and replacement frequency.
Quality Assurance
Quality is built into every stage of production.
From raw material inspection to final product testing, our quality management system follows internationally recognized standards to ensure every gasket meets customer specifications.
Our materials are available with compliance to:
- ISO 9001:2015
- ISO 14001:2015
- RoHS
- REACH
- PAHS
- FDA
- NSF
- WRAS
- ACS
- LFGB
- KTW-W270
- UL
Frequently Asked Questions (FAQs)
What is a rubber flange seal?
A rubber flange seal is a gasket installed between two pipe flanges to prevent the leakage of liquids, gases, or pressure during operation.
Can you manufacture flange seals according to customer drawings?
Yes. We provide complete OEM and ODM manufacturing services based on CAD drawings, 3D files, technical specifications, or physical samples.
What sizes do you manufacture?
Our standard production range covers DN15 to DN700, and larger or non-standard sizes can be customized upon request.
Which rubber material is best for water pipelines?
EPDM is generally the preferred choice because of its excellent resistance to water, ozone, aging, and weather. FDA- and WRAS-compliant grades are available for drinking water systems.
Which material is best for oil and fuel applications?
NBR offers excellent resistance to mineral oils and fuels, while FKM is recommended for higher temperatures and more aggressive chemicals.
Do you support small trial orders?
Yes. We welcome prototype projects, small production runs, and high-volume OEM orders for global manufacturers, distributors, and wholesalers.
Looking For A Reliable Custom Rubber Flange Seal Manufacturer?
Whether you need standard flange gaskets, custom rubber flange seals, EPDM water pipe gaskets, FDA-grade silicone seals, oil-resistant NBR flange gaskets, or high-performance FKM sealing solutions, Xiamen Jinshun Sealing Technology has the experience and manufacturing capability to support your business.
With more than 20 years of expertise, ISO-certified production, advanced molding technology, and comprehensive material options, we help customers worldwide improve sealing performance, reduce maintenance costs, and extend equipment service life.
Contact our engineering team today for a free technical consultation, material recommendation, prototype development, or a competitive quotation. We welcome OEM manufacturers, industrial equipment suppliers, distributors, and wholesalers worldwide to build long-term partnerships with us.
