Karez is a perfluororubber, which is the first perfluoroether rubber in the world developed by DuPont Company of the United States in 1968. This product not only has excellent chemical resistance of PTFE, but also has rubber elasticity, excellent heat resistance, cleanliness and explosion resistance. World-recognized products with revolutionary significance.
It is a brand, suitable for making O-rings, known as soft gold, and expensive. If the temperature is not particularly high, it is recommended to use VTION AED. This natural gas pipeline adopts explosion-proof fluororubber as O-ring, which can be used.