Rubber Gasket

Product characteristics:

Rubber gasket

Rubber gaskets are the most basic and widely used gaskets. They are vulcanized with polymers, added with fillers, pigments, and various additives to form synthetic rubber, which has excellent compressibility and resilience. With only a very low pre tightening force, they can effectively seal under low temperature and low pressure conditions. They are easy to disassemble and can also achieve good sealing effects on uneven sealing surfaces. Due to rubber's excellent expandability and impermeability, It forms a very effective seal for resisting the passage of gases and fluids. The commonly used rubber gasket materials include natural rubber, nitrile rubber, chloroprene rubber, ethylene propylene rubber, silicone rubber, fluorine rubber, etc.

Performance characteristics of rubber gaskets:

Natural rubber (NR)

After vulcanization, natural rubber has high elasticity, high mechanical strength, resistance to bending, tearing, and impact. It has good corrosion resistance to alkalis and dilute acids, is not resistant to non-polar solvents, and has poor oil resistance. It is prone to aging under the action of oxygen and ozone.

Nitrile rubber (NBR)

It has excellent oil resistance, second only to polysulfide rubber, polyacrylate rubber, and fluororubber among existing rubbers. It also has the mechanical strength and wear resistance required as a sealing material and is widely used in various dynamic and static seals. The combination of nitrile rubber and polyvinyl chloride can further improve its ozone resistance, wear resistance, and flame retardancy. When used in combination with EPDM rubber, its ozone resistance and low-temperature bending resistance can also be improved. The oil resistance and low temperature resistance of nitrile rubber are closely related to the acrylonitrile content.

Neoprene rubber (CR)

Neoprene rubber is a self reinforcing elastomer with polarity second only to nitrile rubber. Its physical and mechanical properties are similar to natural rubber, and its resistance to aging and chemical corrosion is superior to natural rubber. It is the best type of general rubber. Oil resistance is inferior to natural rubber and superior to other general purpose rubbers. Resistant to corrosion by inorganic acids and alkalis, and is a flame retardant rubber.

EPDM

The copolymer of ethylene and propylene has excellent ozone resistance, aging resistance, and weather resistance. Its electrical insulation has outstanding corona resistance, especially in high-pressure water vapor. Therefore, it can be used as a gasket for high-pressure water vapor devices. Ethylene-propylene rubber also has good stability for various polar chemicals, ethanol, ketone esters, and acid-base, phosphate ester working oils. And sex is cheap for the price.

Silicone rubber (SI)

Silicone rubber has a wide temperature range (-100~+350 ℃), excellent resistance to oxygen, ozone aging, light aging, and climate aging, good electrical insulation, high breathability, outstanding physiological inertness and mold resistance. Special silicone rubber also has oil resistance, radiation resistance, and combustion resistance. The shortcomings of silicone rubber are its low strength, poor acid and alkaline resistance, and high price.

Fluoroelastomer (FPM)

Fluorine rubber has excellent oil and high temperature resistance, comparable to silicone rubber. Its biggest characteristic is high corrosion resistance, and its stability to organic liquids (such as various oils, fuels, solvents, hydraulic fluids), high concentration hydrogen peroxide, and other strong oxidizing agents is superior to other rubbers. Domestic fluorine rubber is divided into two types, namely 23 type and 26 type fluorine rubber. Type 23 fluororubber has better resistance to strong oxidizing acids than type 26, but has poorer resistance to aromatic solvents, chlorinated organic solvents, fuel oils, hydraulic oils, lipid lubricants, and boiling water than type 26.

Rubber gasket usage industries: production and processing departments such as chemical, petrochemical, oil refining, chlor alkali, acid making, phosphate fertilizer, pharmaceutical, pesticide, chemical fiber, dyeing, coking, gas, organic synthesis, food, beverage, etc.

Equipment used: sealing parts at the connections of pipelines, valves, pumps, pressure vessels, heat exchangers, condensers, generators, and air compressors.