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How to choose the right rubber joint

Time: 03-04 󰃯 Reading times: 677 󰃳 Editor in charge: The sea 󰃗 Column: product focus

Introduction: There are many kinds of rubber joints. For different practical projects, it is necessary to select the right products, so as to ensure the performance and characteristics of rubber soft joints to the extreme, so as to achieve the expected use effect, and to ensure the good operation of the pipeline, extend the use of pipes, pumps and valves

      Rubber joint There are many kinds of products. According to different practical projects, we need to choose the right products so as to ensure that Rubber flexible joint In order to achieve the expected effect, and ensure the good operation of the pipeline, prolong the service life of the pipeline, pump and valve. So, how to choose the right rubber joint? Shanghai Luoying company will give you a detailed explanation.
1. According to the ball material of rubber joint, rubber material can be divided into:
Natural rubber: mainly rubber hydrocarbon (polyisoprene), containing a small amount of protein, water, resin acid, sugar and inorganic salt, etc. High elasticity, high tensile strength, tear resistance and electrical insulation
It is easy to be bonded with other materials. It is superior to most synthetic rubber in comprehensive properties. Poor resistance to acid and alkali, poor resistance to aging and solvents; poor resistance to aging. Operating temperature range: about - 60 ℃ to + 80 ℃.
The emulsion is made of chloroprene, which is polymerized with chloroprene. It has the advantages of excellent oxygen resistance, ozone resistance, non flammable, self extinguishing after ignition, oil resistance, solvent resistance, acid and alkali resistance, aging resistance, good air tightness and other advantages; the disadvantages are poor cold resistance, large proportion, high relative cost, poor electrical insulation, easy to roll, scorch and mold during processing. In addition, the raw rubber has poor stability and is not easy to preserve. Operating temperature range: about - 45 ℃ to + 100 ℃.
NBR: a copolymer of butadiene and acrylonitrile. It has good resistance to gasoline and aliphatic oil, good heat resistance, good air tightness, wear resistance and water resistance, and strong adhesion. The disadvantages are poor cold and ozone resistance, low strength and elasticity, poor acid resistance, poor electrical insulation, and poor resistance to polar solvents. Operating temperature range: about - 30 ℃ to + 100 ℃.
Ethylene propylene diene monomer (epmepdm): it is a terpolymer of ethylene, propylene and non conjugated dienes. It has excellent oxidation resistance, ozone resistance and corrosion resistance. The disadvantage is that self-adhesive and mutual adhesion is very poor, not easy to bond. Operating temperature range: - 50 ℃~ + 150 ℃.
Fluororubber (FPM): it is an organic elastomer made by copolymerization of fluorine-containing monomers. It is characterized by high temperature resistance up to 300 ℃, acid and alkali resistance, oil resistance is very good among oil resistant rubber, good radiation resistance and high vacuum resistance, and excellent electrical insulation, mechanical properties, chemical corrosion resistance, ozone resistance and atmospheric aging resistance. The disadvantages are poor processability, high price, poor cold resistance and low elastic permeability. Operating temperature range: - 20 ℃~ + 200 ℃.