HNBR
What is HNBR and what does it include?
The HNBR (NBH) family known for its high strength and durability, is obtained through a selective hydrogenation process of NBR. It is produced by a process that hydrogenates the unsaturation (carbon double bonds) in the butadiene unit of the polymer.
Excellent oil/fuel resistance of elastomers thanks to nitrile (NBR) combined with superior mechanical properties, improved chemical resistance.
HNBR compounds offer an operating temperature range of up to -55 °C (-67 °F), making them ideal for cryogenic environments. They also stand out for their high compression-set performance and outstanding abrasion resistance. In addition, HNBR is available with element™ certification according to UNI EN ISO 23936-1 (ref. NORSOK M-710), ensuring compliance for highly demanding industrial applications.
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Advantages:
- good oil/fuel and chemical resistance;
- good weathering resistance,
- excellent mechanical properties including tensile strength, tear strength, modulus, elongation at break and abrasion;
- wide temperature range;
- can be compounded for excellent rapid gas decompression (RGD) resistance.
Limitations:
- limited resistance to aromatics.
Quality certifications
element™ certification according to NORSOK M-710.
Industrial applications and benefits
HNBR performs reliably at extreme temperatures from -55 °C up to 140 °C and is considered a premium material in sealing technology, finding application in automotive timing belts, rod and piston seals, O-rings and radial shaft seals. The material is ideal for applications requiring a combination of mechanical strength and thermal stability.
Use in the process industry
In the process industry, HNBR is popular as a sealing material in butterfly valves. Thanks to its versatility, it is particularly suitable for sectors such as dairies, the beverage industry and applications in contact with fatty substances. HNBR therefore represents a durable and versatile solution for work environments subjected to particularly severe mechanical and thermal conditions
| Hydrogenated - HNBR | |||||||
|---|---|---|---|---|---|---|---|
| material | hardness ShA | operating temp. °C | tensile strength MPa | specific weight g/cm3 | tensile strength % | comp. | rating * |
| HNBR AED | 90 ± 5 | -18/ +160 | ⋝ 18 | 1,27 ± 2 | ⋝ 130 | ⋜ 25 | in certif. |
| HNBR AED LT | 90 ± 5 | -47/ +150 | ⋝ 18 | 1,28 ± 2 | ⋝ 130 | ⋜ 25 | Norsok M-710 |
| HNBR AED U.L.T. | 90 ± 5 | -53/ +160 | ⋝ 18 | 1,29 ± 2 | ⋝ 130 | ⋜ 25 | in certif. |