Linde Polymer Tec Co.,Ltd. is one of the most experienced manufacturers and suppliers of car a/c refrigerant line o-ring in China, also supports customized service. Please feel free to buy high quality car a/c refrigerant line o-ring for sale here from our factory.
Products Description
Car A/C refrigerant line O-ring is a ring-shaped seal used to seal refrigerant lines. Its main function is to prevent leakage of high-pressure refrigerant and ensure efficient operation of the air conditioning system.
Features and Benefits
- Extreme environment resistance:
Made of high-quality HNBR (hydrogenated nitrile rubber), it can withstand refrigerants (such as R134a, R-1234yf), lubricants (PAG oil), and extreme temperatures from -40°C to 150°C, and is resistant to aging and expansion.
- Chemical corrosion resistance:
Resistant to chemical substances in refrigerants to avoid seal failure.
- 100% airtightness:
Precision dimensional tolerance and elastic structure design fit the pipeline interface, effectively prevent refrigerant leakage, maintain system pressure stability, and ensure refrigeration efficiency.
- Anti-vibration and shock:
Elastic materials absorb pipeline vibrations and reduce the risk of loose seals caused by vehicle bumps.
- Compatibility:
Adapts to mainstream refrigerant types (R12, R134a, new environmentally friendly R-1234yf) and pipeline interfaces of various brands and models, with strong versatility.
Function and Importance
Car A/C refrigerant line O-ring is installed in the groove of the refrigerant pipe connection, filling the gap by deforming under pressure to form an airtight seal. Failure will cause refrigerant leakage, reduce cooling efficiency, or even system paralysis.
Aged rubber O-rings are prone to brittle cracking and need to be checked or replaced regularly.
Block the contact between refrigerant and external air to prevent air conditioning failure caused by refrigerant leakage.
Maintain the internal pressure balance of the air conditioning system to ensure the efficient operation of core components such as compressors and condensers.
Reduce refrigerant leakage (such as R-1234yf has an extremely low GWP value) and comply with global environmental regulations (such as the EU MAC Directive).
Material
Made of elastic material, such as hydrogenated nitrile rubber (HNBR). This material is resistant to high temperatures (-40°C to 80°C), ozone, and chemical corrosion, and is suitable for modern environmentally friendly refrigerants (such as R134a). Some O-rings may be green or other colors to distinguish their use.
| HNBR | ||||
| Property | Unit | Test Method | Test Parameter | Value |
| Hardness | IRHD | ASTM D 1415 | 75 | |
| Tensile Strength | MPa | ASTM D 412 | 23 | |
| Ultimate Elongation | % | ASTM D 412 | 229 | |
| Specific Gravity | g/cm3 | ASTM D 297 | 1.24 | |
| Compression Set | % | ASTM D 395 B | 22h / 150°C | 16.5 |
| Low temp. resistance | °C | ASTM D 2137 | brittleness no cracks after 3 min. at |
-40 |
| Low temp. resistance | °C | ASTM D 1329 | TR10 | -20 |
Quality certification and reliability
- It complies with international standards such as SAE J2064 and ISO 9001 and has passed high-pressure cycle tests and thermal shock tests.
- 100% airtightness testing before leaving the factory ensures the reliability of each product under harsh working conditions.
O-rings are widely used in various connection parts of automotive air-conditioning systems, such as pipe connections between compressors, condensers, evaporators, and expansion valves.
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