Langfang Zhongrun Sealing Material Co., Ltd.  

Product Name: Asbestos Gasket for Pump Valve Pipeline Made in China Standard: Standard Shape: O-Ring Performance: Temperature Type: Stationary Seal Application: Pumps Material: Rubber Trademark: zhongrun Transport Package: Wooden Case Origin: Hebei China Product Description Rubber gasketNBR gasket 51 ºC ~ 121 ºC pressure < 2.5MPa DN15 ~ dn400Fluorine rubber gasket - 30 ºC ~ 200 ºC pressure < 3.0MPa DN15 ~ dn400Natural rubber gasket - 57 ºC ~ 93 ºC pressure < 2.5MPa DN15 ~ dn400Neoprene gasket - 51 ºC ~ 121 ºC pressure < 2.5MPa DN15 ~ dn400EPDM gasket - 57 ºC ~ 176 pressure < 2.5MPa DN15 ~ dn400Silicon rubber gasket - 100 ºC ~ 300 ºC pressure < 3.0MPa DN15 ~ dn400Oil resistance editorOil resistance is a very important feature of rubber material. Rubber pad needs to be used in the environment of various oil-resistant media in many cases. Oil resistance is a very important parameter of rubber pad, but the oil resistance ability of various rubber materials is also different, which will be introduced in detail belowFuel oil resistance: FKM and fmvq have good fuel oil resistance. But the fire resistance of CPE is poor.The fire resistance of NBR increased with the increase of acrylonitrile content. The oil resistance of chlorohydrin rubber is better than that of NBR.Resistance to mixed fuel oil: FVQ and FKM have the best resistance to mixed fuel oil. Acrylate rubber has poor resistance to mixed fuel oil.The mixed fuel resistance of NBR increased with the increase of acrylonitrile content.The fluorine rubber with high fluorine content has good stability to the mixed fuel.Acid resistance, oxidation and oil burning resistance:For acid oxidation fuel oil, hydroperoxides in acid oxidation fuel oil can worsen the performance of vulcanizate, so it is difficult to meet the requirements of long-term use of NBR and chlorohydrin rubber commonly used in fuel system.only fluoroelastomers such as FKM, fmvq, PFQ and hydrogenated NBR have good properties.Ordinary NBR compound can't work for a long time in acid gasoline of 125 ºC. only by using low sulfur donor activated by cadmium oxide and NBR with white carbon black as the main raw material, can the acid resistant gasoline be better. Increasing the content of acrylonitrile can reduce the permeability of acid gasoline