Note on selection of non metallic gasket materials

The choice of gasket material is mainly determined by the following three factors: temperature and pressure medium

Non metallic gasket material

The natural rubber NR

For the weak acid and alkali, salt and chloride solution with good corrosion resistance, oil and solvent corrosion resistance is poor, and is not recommended for the ozone medium. The recommended operating temperature to 93 DEG C 57.

The chloroprene rubber CR

The synthetic rubber is a synthetic rubber, which is suitable for the corrosion of acid, alkali and salt solutions. The recommended operating temperature to 121 DEG C 51.

The perbunan NBR

The rubber is a synthetic rubber, which is suitable for the corrosion of oil, solvent, basic hydrocarbon compound, oil and natural gas in a wide temperature range. Recommended operating temperature 51 ~ 121.

The fluorine rubber

Has a good corrosion resistance to oil, fuel, chloride solution and lipid hydrocarbon and acid, but not suitable for amines, lipids and steam. The recommended operating temperature of-40 to 232 DEG C.

The silicone rubber

Good corrosion resistance to air. Silicone rubber is not affected by sunlight and ozone.

The ethylene propylene rubber

Has a good corrosion resistance to acid and alkali, salt and chloride solution. The recommended operating temperature to 176 DEG C 57.

The stone

For many acids, bases, salts, and organic and organic matter and heat transfer solutions, and even high temperature solution has a very good corrosion resistance. It can't melt, but it's more than 3316. When the sublimation. In the high temperature conditions, the use of the material in the strong oxidation of the media should be careful. In addition to the gasket, the material can also be used as a filler and a non - metallic winding tape wrapped around the gasket.

The ceramic fiber

The ceramic fiber which is formed in the strip is a kind of excellent gasket material which is suitable for high temperature and low pressure working condition and light flange condition. It is recommended that the working temperature is 1093 degrees Celsius.

The PTFE

PTFE concentrates most of the advantages of plastic gasket materials, including temperature resistance from - 95 to 232. In addition to free fluorine and alkali metal, the chemical substances, solvents. Hydroxide and acid have excellent corrosion resistance. PTFE material can be filled with glass, the purpose is to reduce the cold flow of PTFE.