The rubber strips or blocks of rubber seals are mainly used for the following rubber seals: sealing, absorbing stress and deformation, limiting and so on. Adhesive strips or blocks have different uses and positions, and their hardness is also different. In order to ensure a certain degree of hardness and tightness, the hardness of the sealing strip is generally HA60～70 at room temperature.

If the rubber strip is round or square solid, the hardness is generally HA50-60 at room temperature. If the rubber strip acts as a limit, the hardness is generally normal temperature HA80～90 neoprene, butadiene rubber, butyl rubber can be used, when the flying altitude exceeds 643Km, the air pressure will drop below 133×10-7Pa(10-7mmHg) In this high vacuum, only fluorine rubber can be used.

Generally, high-temperature baking treatment is required before high-vacuum or ultra-high-vacuum device systems are used. Model 26 and 246 fluororubbers can withstand high temperature aging at 200℃~250℃, so they become the most important rubber in high vacuum equipment and spacecraft. Seal material.

The hose made of fluorine rubber is suitable for high temperature resistance, oil resistance and special medium resistance, such as aircraft fuel oil, hydraulic oil, synthetic diester oil, high temperature hot air, thermal inorganic and other special media (such as chlorinated hydrocarbons and Other chlorides) transportation, guidance, etc.

Wires and cables made of fluorine rubber have good flexibility and good insulation. The glass fiber tape made of fluorine rubber can withstand high temperature of 300℃ and resist chemical corrosion.

After the aramid cloth is coated with fluorine rubber, it can be used to make the connection expansion pipe between the high temperature resistant, acid and alkali resistant storage tanks of the petrochemical plant (the two ends can be connected by metal flanges), which can withstand high pressure, high temperature and medium corrosion, and The deformation and expansion of the two tanks play a role in buffering and shock absorption connection. The rubber sealing bag made of nylon cloth coated with fluorine rubber by the manufacturer of rubber seals is used as a soft seal for the inner floating roof storage tank of the oil refinery to seal and reduce the volatilization loss of the oil level.