Description
Due to different annular convolutions, bellows are easily extensible & compressible and are appreciated for providing an excellent cushioning effect. Depending upon the end-use requirement rubber bellows are manufactured using various synthetic polymers such as SBR, Neoprene, NBR, Ethylene Propylene Diene Monomer (EPM, EPDM), etc.
Material Selection Guide
MATERIAL | NR | SBR | NBR | CR | EPDM | HNBR | ACM | CSM | SILICONE | FKM (VITON) |
HARDNESS RANGE ( SHORE A) | 40-90 | 35-90 | 40-90 | 40-80 | 40-90 | 40-90 | 40-80 | 40-80 | 30-80 | 50-90 |
HIGH TEMP C | 100 | 120 | 130 | 130 | 150 | 150 | 180 | 150 | 230 | 225 |
LOW TEMP C | -50 | -55 | -45 | -40 | -50 | -45 | -25 | -40 | -60 | -15 |
STEAM | F | F | F | P | G | G | P | E | E | E |
E= EXCELLENT; G= GOOD; F= Fair; P= Poor; A=Available, NA= Not Available
This guide is intended for general reference Only. The materials listed are the most commonly used. There are numerous compound variations designed for specific applications for which please forward details to our engineers for recommendation.
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