NBR (Nitrile Butadiene Rubber), often referred to as Buna-N, is the most widely used elastomer for oil-resistant sealing. Carlock Sealing's NBR seals offer an ideal balance of mechanical strength, wear resistance, and cost-efficiency. Specifically engineered to withstand mineral-based oils and fuels, our CNC machined NBR components are the preferred choice for general-purpose sealing in hydraulic cylinders, pumps, and pneumatic valves across the oil & gas and manufacturing industries.
Used for U/Y-type sealing rings, dustproof sealing rings, V-type combination sealing rings and some special sealing rings. It has good corrosion resistance in mineral oil and HFA, FFB, HFC hydraulic oils, but is not suitable for ethylene glycol media, HFD, aromatic hydrocarbon esters, ketones, amines and concentrated acids and alkalis.
- Excellent Oil Resistance: Highly resistant to mineral oils, hydraulic fluids, and aliphatic hydrocarbons.
- Good Mechanical Properties: High abrasion resistance and good compression set characteristics ensure long-term sealing.
- Versatile Hardness Options: Available in various Shore hardness levels (typically 70 to 90 Shore A) to suit different pressure requirements.
- Economical Solution: Provides reliable sealing performance at a lower cost point compared to fluorinated elastomers.
Technical Disclaimer: NBR has limited resistance to ozone, sunlight, and weathering. It is not recommended for applications involving high-concentration ozone or exposure to strong oxidizing acids.
FAQ:
Q: Is Carlock Sealing's NBR suitable for outdoor low-temperature use?
A: Standard NBR works well down to -30°C. For extreme arctic conditions reaching -50°C, Carlock Sealing recommends our specialized TPU model or low-temperature grade NBR.
Q: Can NBR be used with brake fluids?
A: No. NBR is not compatible with glycol-based brake fluids or polar solvents. For those applications, Carlock Sealing offers EPDM or specialty FKM compounds.
Q: Why choose CNC machined NBR over standard O-rings?
A: CNC machining by Carlock Sealing allows for custom profiles, non-standard sizes, and the elimination of flash lines found in low-quality molded O-rings, providing a more reliable seal for critical hardware.
