Industrial Rubber Flange Gasket — NBR, FKM, EPDM & Silicone Sealing Solutions
We supply custom rubber gaskets made of NBR, FKM, EPDM, and Silicone. These gaskets deliver good elasticity, low compression set, and reliable leakproof static sealing. They are oil, heat, ozone, and weather resistant, making them widely used for automotive, flange, pump, valve, HVAC, and industrial machinery sealing applications. OEM and sample orders are available.
Key Features of Our Rubber Flange Gaskets
- Made of high-quality rubber raw materials with optional materials: NBR, FKM, EPDM, and Silicone to suit different working media.
- High elasticity and flexibility — closely fit uneven mating surfaces to achieve reliable static sealing.
- Low compression set — retains good elasticity after long compression for stable sealing and longer service life.
- Excellent aging resistance, wear resistance, and environmental durability under proper working conditions.
- Custom size, shape, and hardness (30–90 Shore A) available, including flat, flange, and special molded gaskets.
- Simple installation and replacement — convenient for equipment maintenance and part replacement.
If you have any inquiry, please feel free to contact us. We can offer you favorable pricing and high-quality goods.
NBR 70 Test Report — ASTM D2000 M2BG 714 B14 EO14 EF11 EF21 EA14 F17
| Properties |
Specification |
Test Result |
Test Method |
| Hardness Shore A |
70±5 |
72 |
D2240 |
| Tensile MPA Min |
14 |
14.5 |
D12 |
| Elongation % Min |
250 |
315 |
D412 |
| Gravity |
— |
1.263 |
D297 |
| Heat resistant 70h 100℃ — Hardness change |
±15 |
+5 |
D573 |
| Heat resistant — Tensile strength % |
±30 |
+15 |
— |
| Heat resistant — Elongation Max |
-50 |
-12 |
— |
| Compression Max 22h at 100℃ |
25 |
14 |
D395 |
| NO1 Oil Resistant |
| Change in hardness |
-10~+5 |
+1 |
D471 |
| Change in tensile Max |
-25 |
-16 |
— |
| Change in Elongation |
-45 |
-20 |
— |
| Change in Volume % |
0~25 |
+6 |
— |
| Fuel Resistant 70 H at 23℃ |
| Hardness change |
±10 |
+3 |
D471 |
| Tensile change Max |
-25 |
-8 |
— |
| Elongation change Max |
-25 |
-10 |
— |
| Change in Volume |
-5~+10 |
+3 |
— |
| Water Resistant |
| Change in Hardness |
— |
+3 |
D417 |
| Change in tensile |
— |
+5 |
— |
| Change in Elongation |
— |
-14 |
— |
| Change in Volume |
±15 |
+3 |
— |
| Low Temperature Resistant |
| 3 MIN -40℃ |
Non brittle |
Pass |
D2137 |
Certifications & Compliance
We hold the following certificates: ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, IATF, FDA, REACH, ROHS, SGS, and more.
For color, we can manufacture according to customer requirements. If you need colored O-rings, please provide the Pantone number.
Additional Rubber Sealing Products We Manufacture
We can also produce Automotive Rubber Seals, Connector Rubber Seals, Power Tool Rubber Seals, Valve Rubber Seals, Pipe Rubber Seals, Semiconductor Rubber Seals, Hydraulic & Pneumatic Rubber Seals, Pump Rubber Seals, Oil and Gas Seals, Food Grade Rubber Seals, Medical Rubber Seals, Chemical Equipment Rubber Seals, and more.
Our Factory — 30+ Years of Rubber Sealing Manufacturing
- Since 2006, focused on rubber seals, especially for auto parts.
- Certificates: ISO 9001, IATF 16949, ISO 14001, ISO 45001, ISO 13485.
- Two factories covering over 18,000㎡, including a 600㎡ clean room, with 300 workers.
- Over 10,000 mold sets, including approximately 5,000 sets for O-rings.
- O-ring series covers American standard (AS568), Japanese standard (JIS), national standard (GB), and a large number of customized non-standard parts.
- Materials: NBR, FKM, SIL, EPDM, CR, NR, PU, HNBR, FFKM, SBR. Rubber materials meet ROHS 2.0 and REACH 235 requirements.
- Material certificates: FDA, ROHS, REACH, UL157, CP65, WRC, EN549, EN45545.
- Products are widely used in automotive parts, electronic connectors, valves, pneumatics, power tools, new energy, medical equipment, electronic products, and other fields.
- The company has introduced HRP, ERP, and other systems since its inception.
- Labor cost, raw material procurement, production process, and product quality are comprehensively and scientifically controlled.
Our Strength — Professional OEM & ODM Rubber Sealing Manufacturer
- Professional OEM & ODM with 30+ years of rubber sealing manufacturing experience.
- Full range of molds — over 10,000+ sets.
- Professional team providing efficient trading service.
- Strict quality control — quality guarantee.
- Owned testing laboratory with sophisticated test equipment.
- Advanced equipment: 50+ curing machines, 8 CCD automatic inspection machines, 8 all-in-one machines.
Cooperative Partners
Ruichen has cooperated with many superior customers. We have a complete system and excellent productivity to serve you.
Our Advantages — Custom Rubber Manufacturing Services
We provide rubber manufacturing technology consultation and product R&D (OEM & ODM).
- Competitive mold fee.
- Rubber molding for various sizes and shapes — custom orders possible.
- Custom personalized logo accepted.
- Over 10,000 types of custom molded rubber products established and refined.
- Various materials: Silicone, EPDM, NBR, FKM (Viton), HNBR, NR, Neoprene (CR), SBR, MPU, etc.
- Different hardness: 30 to 90 Shore A.
- Various colors: translucent, black, white, blue, green, red, etc.
Why Choose Ruichen?
Many large companies select Ruichen for their rubber seals and customized rubber parts because we consistently satisfy them in quality, price, delivery, and service. We also attach great importance to small customers in niche markets. Whether your purchase quantity is big or small, you are our valuable partner.
High Quality
We continue to manufacture high-quality products for all customers and pursue 100% customer satisfaction, which has become one of our core competencies.
Profession
We have rich experience in materials, products, and production, along with excellent international trade and language communication skills.
Best Services
From quoting, sampling, production, and shipping to after-sales, our sales team will provide you with the best service so you can rest assured completely.
10,000+ Projects Delivered
Over 10K projects have been sent to our customers worldwide in recent years, and we have received countless positive comments.
Low Price
Our customers can obtain maximum profits through the ISO management system and intelligent manufacturing to continuously reduce our costs.
Massive Capacity
Our in-house facilities allow us to get your projects done fast. Thanks to our strong relationship with rapid materials partners, our capacity is not limited.
Fast Delivery
Unlimited capacity, experienced engineers, and a flexible production system allow us to create your seals and production parts in a short period.
1,000+ Happy Customers
We aim to keep every customer happy with reliable quality, fast turnaround, and excellent services. We want all our new customers to become long-term customers.
Frequently Asked Questions (FAQ)
Q1: What kinds of materials can you provide?
A: NBR, EPDM, Silicone, FKM (Viton), Neoprene (CR), HNBR, NR, IIR, SBR, ACM, AEM, Fluorosilicone (FVMQ), FFKM, etc.
Q2: How to select the raw compound for my application?
A: With years of experience working with a variety of materials, we can help select the material that will best suit your needs while keeping material costs in mind.
Q3: How long can we get the quote?
A: If your information is complete, we will provide the quotation within 8 hours.
Q4: Can you provide samples? Is it free or extra?
A: Yes, we can provide samples for free. Freight can be negotiated.
Q5: What is the normal lead time for product orders?
A: If in stock, generally 3–7 days. Mold orders take about 15–18 days. No-mold orders take about 25–30 days, depending on the product situation.
Q6: How to check the quality of the bulk order?
A: We have incoming inspection to control the quality of raw materials, process inspection to ensure the quality of the production process, and shipping 100% full inspection. Automatic inspection machines provide full inspection, and pre-production samples can be provided according to customer needs before mass production.
Q7: What is your standard packing?
A: Plastic bag for inner packing, carton box for outer packing. Also can be packed according to customer requirements.
Q8: What's the payment term?
A: We accept T/T 30% deposit and 70% balance.
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