CR O-rings

CR O-rings, also known by the trade name Neoprene®, are general-purpose seals providing a balanced combination of properties, most notably good resistance to refrigerants, water, ozone, and weathering. This makes them particularly suitable for outdoor and refrigeration applications.
Key Features and Properties
Material: CR (Chloroprene Rubber), a synthetic elastomer developed commercially in the 1930s.
Temperature Range: Generally performs reliably from -40°C to +100°C (-40°F to +212°F), with some special grades extending this up to +125°C or +135°C.
Mechanical Properties: Exhibits good tensile strength, good abrasion resistance, resilience, and a low compression set. Suitable for both static and dynamic sealing applications.
Flame Resistance: CR rubber resists burning better than purely hydrocarbon-based rubbers and can be self-extinguishing when the flame source is removed.
Chemical Compatibility
Resistant To:
Refrigerants such as Freon® (R12, R13, R21, R22, R113, R114, R115, R134A) and ammonia.
Silicone oils and greases.
Water and aqueous solutions (within specified temperature limits).
Ozone, UV radiation, and outdoor weathering/aging.
Paraffin-based mineral oils with low aniline point (low DPI).
Mild acids and alkalis (to a limited extent).
Not Recommended For Use With:
Aromatic and chlorinated hydrocarbons (e.g., benzene, toluene, trichloroethylene).
Strong acids, ketones (acetone, MEK), esters, and aldehydes.
Glycol-based brake fluids.
Most petroleum fluids (especially those with high DPI).
Typical Applications
Due to its balanced properties and specific resistances, CR O-rings are widely used in:
Refrigeration and HVAC Systems: Their remarkable resistance to refrigerants like Freon® and ammonia makes them an ideal choice for the cooling industry.
Automotive Industry: Used in various automotive parts, including engine cooling systems, but not typically in glycol-based brake fluid systems.
Outdoor and Marine Applications: Excellent weather, ozone, and UV resistance makes them suitable for exterior seals, wire/cable jacketing, and applications involving seawater.
Electrical Components: The flame-retardant properties and electrical insulation make them useful in electrical sealing applications.
Water and Wastewater Management: Applied in pumps, valves, and piping systems due to water resistance.