Savvy Rubber is a professional CR / chloroprene / Neoprene O-ring manufacturer in China.
- Payment Way: T/T, Western Union, Paypal
- Incoterm: EXW, FOB, CIF
- Shipping Way: By Air or Sea
- Manufacturer Place: Ningbo, China
- Delivery Time: 7 - 30 days
- Factory Status: Stocked for Sale
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Description
Neoprene O-rings, also known as CR or chloroprene O-rings, are O-shaped sealing rings made from polychloroprene rubber. This synthetic elastomer is produced by emulsion polymerization of chloroprene (2-chloro-1,3-butadiene). The name “Neoprene” originates from a DuPont trademark introduced in the 1930s and has since become the standard industry term for this material, despite its chemical name being polychloroprene.
Polychloroprene is polar, unsaturated, and slightly crystalline, offering good mechanical strength along with resistance to weathering, ozone, ammonia, and many refrigerants. Due to these properties, Neoprene (CR) O-rings are widely used in refrigeration systems, delivering reliable sealing in outdoor, HVAC, and fire-sensitive applications across –40°C to 100°C.
Specifications
- Material: Neoprene, Chloroprene, CR
- Temperature Range / Rating: -40 °C (-40 °F) to 120°C (248 °F)
- Low Operating Temperature Limit: -40 °C (40 °F)
- Maximum Operating Temperature Limit: 120°C (248 °F)
- Durometer Hardness Range: Shore A 40-90
- Standard Durometer Hardness: Shore A 70
- Less Used Duro Hardness: Shore A 50, 90
- Color: Black (standard), custom color is available
- Outline: Round, square, rectangular, custom
- Cross Section Profile: Round (standard), square, X, D, T, custom
- Cross Section Width (CS): 0.5 to 20 mm (0.020 to 0.787 inch)
- Inside Diameter (ID): 0.7 to 2965 mm (0.028 to 116.732 inch)
- Standard Size: AS 568, BS 1806, ISO 3601, DIN 3771, JIS B 2401
- Shelf Life: About 6 years
- Compliance: RoHS, REACH, FDA (available upon request)
- Price Level: Moderate
Performance Characteristics
The table below summarizes the typical performance of standard Neoprene (CR) rubber across key environmental resistance, chemical compatibility, and mechanical attributes. Ratings are based on industry-standard evaluations: Excellent (recommended), Good (suitable with limitations), Fair (limited use), and Poor (not recommended).
Excellent
- Ozone
- Weather
- Alkali
- Flame
- Abrasion
- Tensile Strength
Good
- Water
Fair
- Chemicals
- Oils
- Acid
- Compression Set
Poor
- Steam
Material Data Sheet
The following table presents the physical properties and fluid resistance performance of our standard CR/Neoprene/Chloroprene O-ring material, formulated to meet ASTM D2000 M3BC710 specifications. All test results are based on cured compounds tested per the indicated ASTM methods, including heat aging, compression set, and exposure to fluid IRM 901 and IRM 903.
This is the Material Data Sheet (MDS) for our standard 70 Shore A Neoprene compound. Savvy Rubber also offers and routinely tests 40, 50, 60, 80, and 90 Shore A Neoprene formulations. If you require data for other hardness grades, please contact our sales team.
| Neoprene Shore A 70 Material Data Sheet | |||
|---|---|---|---|
| Test Standard: ASTM D2000 M3BC710 A14 B14 EO14 EO34 F17 | |||
| ORIGINAL PHYSICAL PROPERTIES | TEST METHOD | REQUIREMENTS | TEST RESULTS |
| Hardness Shore A | D2240 | 70±5 | 72 |
| Tensile Strength, MPa (psi) | D412 | 10 (1450) min. | 15.6 (2262) |
| Ultimate Elongation, ％ | 250 min. | 311 | |
| Specific Gravity (g/cm³) | — | 1.36 | |
| HEAT RESISTANCE 70H AT 100℃ (A14) | TEST METHOD | REQUIREMENTS | TEST RESULTS |
| Hardness Change, Points | D573 | +15 max. | +9 |
| Tensile Strength Change, % | -15 max. | -5 | |
| Ultimate Elongation Change, % | -40 max. | -21 | |
| COMPRESSION SET, 22H AT 100℃ (B14) | TEST METHOD | REQUIREMENTS | TEST RESULTS |
| Permanent Set % | D395 | 35 max. | 26 |
| FLUID RESISTANCE IRM 901 OIL, 70H AT 100℃ (EO14) | TEST METHOD | REQUIREMENTS | TEST RESULTS |
| Hardness Change, Points | D471 | -10 to +10 | -3 |
| Tensile Strength Change, % | -30 max. | -13 | |
| Ultimate Elongation Change, % | -30 max. | -19 | |
| Volume Change, % | -10 to +15 | +2 | |
| FLUID RESISTANCE IRM 903 OIL, 70H AT 100℃ (EO34) | TEST METHOD | REQUIREMENTS | TEST RESULTS |
| Hardness Change, Points | D471 | -60 max. | -38 |
| Tensile Strength Change, % | -50 max. | -27 | |
| Volume Change, % | +100 max. | +65 | |
| LOW TEMPERATURE RESISTANCE (F17) | TEST METHOD | REQUIREMENTS | TEST RESULTS |
| Non-brittle after 3 Min at -40°C | D2137 | PASS | PASS |
Test results are typical values for Savvy Rubber standard Shore A 70 Neoprene compound. Actual performance may vary based on operating conditions, fluid concentration, and exposure time. For critical applications, we recommend sample testing.
Features
Neoprene o-rings stand out among general-purpose elastomers for their unique combination of flame resistance, weatherability, ozone resistance, and compatibility with common refrigerants and ammonia. They are self-extinguishing and meet basic fire safety requirements without the need for additives, making them suitable for applications where ignition resistance is crucial.
These o-rings maintain reliable performance in outdoor or exposed environments due to excellent resistance to sunlight, oxygen, and atmospheric aging. Their durability in such conditions is surpassed only by EPDM, but neoprene offers better resistance to certain polar fluids, such as alcohols and diluted inorganic acids and alkalis.
Neoprene O-rings are widely used in refrigeration and HVAC systems due to their proven compatibility with ammonia (R717) and many traditional refrigerants. Continuous service is rated from –40°C to 100°C, with short-term exposure up to 120°C.
However, they have limited resistance to mineral oils, hydrocarbons, and fuels, and should not be used in hydraulic or fuel systems. Low-temperature flexibility declines below –40°C, and electrical insulation properties are poor due to the material’s polarity.
Applications
Neoprene o-rings are commonly used in refrigeration and HVAC systems where exposure to ammonia (R717) or traditional refrigerants is required. Their excellent resistance to sunlight, ozone, and weathering makes them ideal for outdoor sealing applications such as construction joints, marine equipment, and agricultural machinery.
Due to their inherent flame resistance and self-extinguishing properties, they are also selected for use in transportation, electrical enclosures, and appliances where basic fire safety is a consideration. Neoprene o-rings perform reliably in contact with water, alcohols, diluted acids and alkalis, and many polar solvents.
They are not recommended for use with mineral oils, fuels, or hydrocarbon-based hydraulic fluids.
