O-Rings for HVAC & Refrigeration Systems
O-rings are critical components in HVAC and refrigeration systems, providing reliable seals that withstand extreme temperatures, refrigerants, and pressures while maintaining system efficiency.
Key Requirements for HVAC/R O-Rings
- Refrigerant Compatibility: Resistance to modern refrigerants including HFCs, HFOs, and natural refrigerants
- Temperature Performance: Stable across extreme ranges (-60°F to 300°F)
- Low Permeability: Minimizes refrigerant leakage and system efficiency loss
- Compression Set Resistance: Maintains seal integrity under constant pressure
- Oil & Lubricant Resistance: Compatibility with compressor oils and system lubricants
- Long Service Life: Withstands years of thermal cycling and vibration
Common HVAC/Refrigeration Applications
- Refrigerant Lines: Sealing connections in copper and aluminum tubing
- Compressor Seals: Shaft seals, valve plates, and housing gaskets
- Heat Exchangers: Plate heat exchangers and coil connections
- Expansion Valves: Sealing thermal expansion valves and electronic valves
- Service Valves: Schrader cores and service port seals
- Chiller Systems: Large diameter seals for industrial chillers
Recommended Materials
HNBR
Excellent for R-134a systems, good temperature range
EPDM
Preferred for R-410A, ammonia, and CO₂ systems
FKM (Viton®)
High performance for R-404A, R-507, and aggressive refrigerants
Nitrile (NBR)
Economical choice for mineral oil systems
PTFE-Encapsulated
For ultra-low permeability applications
Silicone (VMQ)
Wide temperature range, food-grade applications
Standards & Certifications
Our HVAC/R O-rings meet the industry's most stringent requirements:
ASHRAE Standards
UL 157
SAE J2236
REACH Compliant
NSF-61
FDA Compliant
Compatible with all common refrigerants including:
R-134a
R-410A
R-404A
R-507
R-32
R-1234yf
CO₂ (R-744)
Ammonia (R-717)