Standards of hydraulic hose fittings
Rubber is one of the most used material in our daily life. Besides, we produce different rubbers to use in different industries. Then what’s the difference among them? Let’s see next.
NR
Natural rubber has great rebound resilience and tensile strength. Besides, the abrasion and tearing resistances are better than most of the synthetic rubbers. Thus it’s a great material for tire and sealing. However, it can’t resist oil. Besides, the weather and ozone resistances are poor. The working temperature is -60℃-100℃.
SBR
10% styrene content SBR has great low temperature resistance. While 30% styrene content SBR has better abrasion resistance. But the oil and aging resistances are not that good. Same as NR, it’s suitable for tire and sealing. The working pressure is a little higher to 120℃.
CR
Special synthetic material makes it resist weather, aging and ozone. Besides, it has excellent oil resistance which is just behind NBR. Caking property to metal fabric makes it suitable for sealing. Moreover, the great self-extinguishment makes it a good material for rubber hose and insulation layer.
NBR
For NBR, the oil, heat and abrasion resistance will be better with the increasing of acrylon content. However, the cold resistance is just the reverse. Great oil resistance makes it suitable for oil hoses like fuel hose, hydraulic hose and dispenser hose. However, the weather and ozone resistances are poor.
EPDM
EPDM has the greatest comprehensive properties. It not only resist ozone and weather, but also resist chemicals like acid and alkali. With the better electricity insulation, it’s widely used for rubber hose and airplane accessories.
Silicone rubber
Among all the rubbers, silicone rubber has the best temperature resistance. It remains flexible even in -50℃. In the meantime, it can work in 250℃ for long term. Besides, it has excellent aging resistance and heat conduction. Therefore, it’s a great material for hose and medical parts. However, the price is also much higher than other rubbers.
Today we learned the properties of different rubbers. If you want to learn more, welcome to contact OrientFlex. We are a hose manufacturer and will offer you the best solution.
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