1-Main property of the sleeve
| Rubber quality | Application examples | Temperature range | Typical media |
| EPDM | Chemical applications: Applicable to 75% of all industrial chemical applications. | -40℃ – ＋110℃ | Concentrated and oxidiziing chemicals. |
| NR | High wear applications. | -40℃ – ＋80℃ | Abrasive materials, diluted acids, alkali & chemicals. |
| NBR | Applications involving oils, fats and hydrocarbon. | -30℃ – ＋100℃ | Oil, fats, fuels hydrocarbon, lubricants. |
| CR | Special-purpse chemical application: Resilient to ozone and averse weather | -40℃ – ＋100℃ | Chemicals, acids, several solvents, aliphatic oils, fats, lubricants |
| IIR | Special-purpse chemical application: Impermeable to gas | -40℃ – ＋100℃ | Concentrated and acidic chemicals, vegetable oil. |
6-Sleeve design
1. Natural rubber is unsaturated rubber, which is easy to vulcanize with vulcanizing agents, oxidize and crack with oxygen and ozone, and has poor aging resistance.Chlorination and bromination reactions occur with halogens, and cyclization reactions occur under the action of acids or catalysts. 2. Natural rubber has good physical and mechanical properties and high elasticity. 3. Natural rubber raw rubber also has good elasticity at room temperature, but it will gradually soften with heating, and its plasticity will get better and better; when its temperature gradually decreases, it will slowly harden, and when the temperature drops to 0℃, its elasticity is greatly reduced.If the temperature drops below -70~-73℃, it becomes as brittle as glass.The phenomenon of raw rubber softening in case of heat and hardening in case of cold is reversible, that is, it has thermoplastic properties. 4. Natural rubber also has high mechanical strength and good flexion and fatigue resistance. 5. Natural rubber has small hysteresis loss, high tear strength, low deformation heat generation, excellent cold resistance and wear resistance, water resistance and air tightness, as well as thermal insulation and electrical insulation properties are also very good; 6. Alkali resistance and general acid resistance are good (but not resistant to concentrated and strong acids). 7. Natural rubber has excellent processing technology and is easy to be plasticized, mixed, rolled, pressed out, molded and pasted.Moreover, natural rubber is also easily soluble in organic solvents such as gasoline and benzene to make a glue.Natural rubber can be vulcanized with ordinary sulfur.
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