Bulk available custom O-rings are essential sealing components used in various industrial, mechanical, and fluid systems. They create a tight seal between two mating parts to prevent leakage of liquids or gases, ensuring system reliability and safety.
Functions of Bulk Available Custom O-Rings
Sealing Function:
O-rings provide critical sealing in pipes, valves, pumps, and other equipment to maintain airtight and leak-free operation.
Leak Prevention:
By forming a precise fit between two surfaces, O-rings prevent leakage of liquids or gases, maintaining safety and efficiency in industrial applications.
Wear Reduction:
O-rings act as a buffer between moving parts, reducing friction and wear, and extending the service life of equipment.
Material Comparison Table
|
Material |
Abbr. |
Hardness (Shore A) |
Temp Range |
Key Features |
Advantages |
Limitations |
Typical Applications (Concise) |
|
Nitrile Rubber |
NBR |
30–90 |
-40°C ~ +120°C |
Oil/fuel resistance |
Affordable, versatile. |
Poor ozone/weather resistance. |
Hydraulic systems, General machinery. |
|
Styrene-Butadiene |
SBR |
40–80 |
-50°C ~ +100°C |
Good resilience |
Low cost, elasticity. |
Poor oil/solvent resistance. |
Non-petroleum brake fluid, Dampeners. |
|
Natural Rubber |
NR |
30–80 |
-60°C ~ +80°C |
Highest tensile strength |
Excellent elasticity. |
Poor heat resistance, zero oil resistance. |
Shock mounts, Elastic gaskets. |
|
Chloroprene |
CR (Neoprene®) |
50–80 |
-40°C ~ +100°C |
Weather/refrigerant resistance |
Good general-purpose. |
Poor resistance to aromatic oils. |
Refrigeration, Marine sealing. |
|
Ethylene Propylene |
EPDM |
40–90 |
-50°C ~ +150°C |
Weather/Water/Steam resistance |
Excellent outdoor performance. |
Poor oil/fuel resistance. |
Plumbing, Brake fluid, HVAC systems. |
|
EPDM Peroxide Cure |
EPDM (P-Cure) |
60–90 |
-50°C ~ +150°C |
Higher thermal stability |
Reliable for hot water/steam. |
Poor oil/fuel resistance (same as std EPDM). |
Automotive cooling, Steam applications. |
|
Butyl Rubber |
IIR |
40–75 |
-40°C ~ +120°C |
Excellent gas impermeability |
Suitable for vacuum. |
Poor resistance to petroleum oils/solvents. |
Vacuum seals, Pharmaceutical stoppers. |
|
Carboxylated Nitrile |
XNBR |
70–95 |
-30°C ~ +100°C |
High abrasion resistance |
Excellent for dynamic sealing. |
Lower flexibility than NBR. |
High-pressure seals, Industrial rollers. |
|
Polyurethane |
PU |
60–95 |
-40°C ~ +85°C |
Extreme mechanical strength |
Preferred for high-pressure. |
Poor resistance to hot water/steam (hydrolysis). |
High-pressure hydraulic cylinders. |
|
Hydrogenated Nitrile |
HNBR |
50–90 |
-40°C ~ +150°C |
Heat/oil/high strength |
Superior durability. |
Higher cost than standard NBR. |
Automotive A/C, Oilfield equipment. |
|
Polyacrylate |
ACM |
50–80 |
-20°C ~ +150°C |
Resistance to hot oil |
Suits transmission fluids. |
Poor low-temperature flexibility, poor water resistance. |
Automotive transmissions, Engine seals. |
|
Silicone |
SI(VMQ) |
5–90 |
-60°C ~ +230°C |
Wide temp range, food-grade |
Excellent high/low-temp. |
Low mechanical strength, poor oil resistance. |
Food/beverage, Medical devices. |
|
Fluorosilicone |
FSI (FVMQ) |
40–80 |
-60°C ~ +180°C |
Oil and low-temp resistance |
Suitable for aerospace fuel. |
Poor tear strength, high cost. |
Aircraft fuel systems, Low-temp oil seals. |
|
Fluorocarbon |
FKM (Viton®) |
50–90 |
-20°C ~ +250°C |
Excellent heat/chemical/oil resistance |
Suitable for corrosive fluids. |
Higher cost, poor performance with hot water/steam. |
High-temp auto engines, Chemical pumps/valves. |
|
Polytetrafluoroethylene |
PTFE (Teflon) |
50-65D |
-200°C ~ +260°C |
Extreme chemical resistance |
Non-Elastomer, resists most chemicals. |
No elasticity (requires mechanical energizer). |
Chemical equipment seals, Bearings. |
|
Perfluoroelastomer |
FFKM |
60–90 |
-30°C ~ +320°C |
Universal Chemical Resistance |
Ultimate reliability in extreme heat. |
Extremely high cost. |
Chemical processing, Semiconductor. |
|
Internally Lubricated |
- |
Varies |
Varies |
Contains internal lubricant |
Reduces friction, aids assembly. |
Higher formulation cost, lubricant may leach out over time. |
Automated assembly lines, Pneumatic cylinders. |
|
Thermoplastic Rubber |
TPR |
5A-85D |
-50°C ~ +135°C |
Combines plastic/rubber traits |
Recyclable, easy to mold. |
Limited temperature range and chemical resistance. |
Consumer goods, Non-critical sealing. |
O Ring Applications
They provide reliable sealing performance without deformation or leakage.
Typical Applications:
Plumbing systems: Prevent water leakage in joints and pipes.
Machinery & equipment: Used for hydraulic and pneumatic sealing.
Automotive parts: Suitable for engine, fuel, and brake systems.
Home & garden tools: Replacement parts for Bunnings machinery and DIY projects.
Products Features
1. Long Service Life
The combination of high elasticity and chemical resistance ensures stable performance and minimal degradation over time, significantly extending equipment life.
2. Superior Sealing Effect
Even under high pressure and extreme temperature changes, Viton O-rings maintain tight sealing, effectively preventing leakage and reducing maintenance costs.
3. Environmentally Friendly Production
All materials comply with RoHS and REACH standards, ensuring environmental safety during use.
Why Choose US ?
1.10,000+ Molds Available – Extensive mold library to meet diverse size and material requirements.
2.No MOQ, Starts from One Piece – Flexible customization from sample testing to bulk production.
3. In-Stock Inventory - Standard sizes in stock, ensuring quick shipment, Fast Global Delivery
Focus on Quality
•Precise inspection, zero-defect quality, ensuring both delivery time and quality.
•Meets the 125/1008H high-temperature aging test requirements of the new energy industry;
•Withstands commercial cleaner (Alcohols, Alkalis, Oils) test requirements.
Packing & Delivery
|
MOQ |
1 pcs |
|
Lead Time |
- In stock: Shipped within 3 days |
|
Port |
China Xiamen |
|
Shipping Methods |
Express (DHL, FedEx, UPS), Air, or Sea |
|
Sample Policy |
Samples available; customer should pay freight cost |
Qualification Certificate
Contact US：
Xiamen Best Seal Imp and Exp Co.,Ltd
Tel: +86-592-5782315
Mob: +8618950159396
Email: yunying2@bestsealhk.com
Add: Unit 522-525, Gaodian Road 6#, Huli District, Xiamen, China
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