English 
English  |
1. NBR rubber O ring is made of new high-quality nitrile rubber, produced through molding process, and undergoes secondary vulcanization after demolding. Then pass two inspections with automatic full inspection machine and manual inspection. Realize high precision and high stability, with a minimum size error of no more than 0.05 mm.
2. The shape of O ring is a standard circle, and the cross-section is also a standard circle. Smooth surface without any burrs or cracks. Glossy and frosted surfaces are available. Good resilience, the minimum tensile strength can reach 20 Mpa.
3. It has excellent oil resistance, wear resistance, and long service life, and has very good resistance to petrochemical oils and hydrocarbon fuel oils. Commonly used for preventing oil leakage. It has a simple structure, easy installation and disassembly, excellent static sealing effect, and can achieve bi-directional sealing with a single piece. The sealing force increases with the increase of system pressure.
4. It has a very low price and is the most widely used rubber O-ring in the world, suitable for all environments without special requirements. The most commonly used for automotive sealing parts and electric vehicle transmission devices.
Item | Unit | NBR O-Ring | |
Normal Condition | Color | / | Black,Green |
Hardness | Shore A | 40—90 | |
Tensile Strength | MPa | 10.6—21.3 | |
Elongation | % | 150—672 | |
Compression Set (100℃/22h) | % | 8—35 | |
Hot Air Aging (100℃/70h) | Hardness Change | Shore A | 2—6 |
Tensile Strength Change | % | -5—21 | |
Elongation Change | % | -9—-32 | |
Oil Resistance Test (IRM901#) (100℃/70h) | Hardness Change | Shore A | 1—8 |
Tensile Strength Change | % | -2—26 | |
Elongation Change | % | -8—-35 | |
Volume Change | % | -1—-4 | |
Oil Resistance Test (IRM903#) (100℃/70h) | Hardness Change | Shore A | -1—-8 |
Tensile Strength Change | % | -2—22 | |
Elongation Change | % | -10—23 | |
Volume Change | % | 0—12 | |
Low Temperature Resistance Test | Brittle Temperature | ℃ | -35—-50 |
Nitrile Rubber (NBR)
Resistance,cheaper
Temperature Range: -30 °C to 125 °C
Advantage: Excellent oil and water
Disadvantage: Substandard cold resistance
Use: Oil & Water resistance situation
Here are specific application scenarios for NBR rubber O-rings:
1. Automotive industry: used for sealing media such as gasoline and lubricating oil in engines, fuel tanks, lubricating oil tanks, air conditioning systems, et.
2. Hydraulic and pneumatic systems: Sealing mineral hydraulic oil in hydraulic pumps, valves, and cylinders is the core sealing component in the hydraulic and pneumatic industry.
3. Petrochemical industry: used for pipelines, valves, pumps, etc., to transport oil and chemical liquids.
4. General Machinery and Electrical Appliances: Widely used for sealing various pumps, compressors, bearings, and electrical equipment.
Q1. What sizes do you have?
A: We have all sizes of AS568 standard and JIS B 2401standard, and about 3000 non-standard sizes, we also can produce the size according to your requirement.
Q2. Do you have any certificates?
A: We have IATF16949:2016 certificate, ROHS certificate, PAHS certificate, REACH certificate and FDA certificate.
Q3. Can I get some samples before order?
A: Yes, we can provide free samples. You only need to pay for the freight.
Q4. What is the lead time?
A: The lead time for samples is 1-3 days. The lead time for mold is 1-2 weeks. The lead time for batch order is 1-3 weeks.
