Nbr70 O Ring Box Repair Seal 30 Sizes O Ring Kit Set For Excavator Machine

NBR

butadiene (NBR) is used at temperatures ranging from -30 ℃ to+110 ℃. It is resistant to gasoline and fatty hydrocarbon oils,second only Nitrile to polysulfide rubber and fluororubber, and has good heat resistance, wear resistance, and water resistance. Not resistant to cold, acid, poor electrical insulation, and polar solvents.

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Fluorine rubber (FPM) can be used at temperatures ranging from -20 ℃ to+200 ℃, and is resistant to high temperatures (below 200℃,it can be used for a long time, and can withstand high temperatures above 300 ℃ in the short term); Good acid and alkali resistance, oil resistance, radiation resistance, and high vacuum resistance; Electrical insulation, mechanical properties, chemical corrosion resistance, ozone resistance, and atmospheric aging resistance are all excellent.

VMQ

Silicon rubber (Si) is used at temperatures ranging from -60 ℃ to+210 ℃, with high temperature resistance (up to 300 ℃) and low temperature resistance (down to -100 ℃). It has excellent electrical insulation, high stability, and high chemical inertness. It has a hydrophobic surface and physiological inertness, and is harmless to the human body. High breathability.

HNBR

Hydrogenated nitrile rubber (HNBR) is used at temperatures ranging from -20 ℃ to+150 ℃, with temperature resistance and weather resistance that are much better than ordinary nitrile rubber. Its oil resistance is similar to that of nitrile rubber; High mechanical strength and wear resistance, mainly used for sealing products that are resistant to oil and high temperatures.

O-rings are one of the most common seals used in machine design because they are inexpensive, easy to make,reliable, and have　simple mounting requirements. The O-ring may be used in static appliCATEEEEEEEEEEions or in

dynamic appliCATEEEEEEEEEEions where there is relative　motion between the parts and the O-ring.

Dynamic examples include rotating pump shafts and hydraulic cylinder pistons.