HNBR rubber is a synthetic rubber known for its excellent balance of mechanical properties and resistance to chemicals. HNBR is ideal material for the O-rings in compressor valve systems.
Compressor is one of the important components for air conditioning systems.Therefore, HNBR O-rings are important to ensure reliable sealing, good oil and refrigerant resistance.
Key Technical Requirements for HNBR O-Rings in Compressor Valves:
1. Temperature Resistance
Automotive compressor valves operate in environments where extreme temperatures are common. HNBR O-rings are designed to handle both low and high-temperature conditions:
Operating Range: -40°C to 150°C, with some grades capable of higher limits, ensuring that the O-rings maintain flexibility at low temperatures while resisting hardening or cracking at elevated temperatures.
2. Chemical Compatibility
The O-rings used in compressor valves are frequently exposed to various chemicals, including refrigerants and compressor oils, which can degrade less resistant materials.
Refrigerant Compatibility: HNBR O-rings are compatible with common refrigerants used in automotive AC systems, such as R134a and newer refrigerants like R1234yf.
Oil Resistance: Compressor systems often use PAG oil or POE oil, and HNBR demonstrates excellent resistance to these oils, ensuring long-lasting sealing and performance.
3. Pressure Resistance
O-rings in compressor valves must seal effectively under high pressure, ensuring no leakage occurs in the system. HNBR O-rings provide:
High Pressure Sealing: Able to maintain an effective seal in high-pressure conditions (typically 15-30 bar in automotive compressors).
Compression Set Resistance: HNBR offers low compression set, meaning it retains its shape and sealing ability over time even when subjected to continuous pressure.
4. Wear and Durability
Abrasion Resistance: HNBR has superior wear and tear resistance compared to standard NBR, which extends the service life of O-rings in harsh automotive environments.
5. Low Permeability
HNBR O-rings provide excellent gas impermeability, which is critical in maintaining system pressure and preventing refrigerant leakage in compressors.
OBT Rubber Seal Experience O-Ring for Vavle
OBT Rubber Seal can offer HNBR compound dedicated for automotive air conditioning system including o-ring for compressor valve. We also provide customized solutions to meet specific application needs, ensuring optimal performance and reliability in different working environments.
For more details, contact OBT Rubber Seal for customized HNBR O-ring solutions for your valve applications.
