Can natural rubber gaskets (NR) be used with low-temperature heat transfer oil (from -40 degrees to +50 degrees)?
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Who has used it? Please reply, thanks! According to HG/T20606-2009, natural rubber (NR) can be used in a temperature range of -50 to +80 degrees, but it is not clear whether low-temperature heat transfer oils can withstand such conditions
The operating temperature for NBR is -20 to 110 degrees Celsius; do not be misled! But natural rubber should also not be used, as its oil resistance is too poor! ! ! The following is from Baidu: The medium resistance properties of natural rubber. Natural rubber has good alkali resistance, but it is not resistant to strong acids. Since natural rubber is a non-polar rubber, it can only resist certain polar solvents; it swells in non-polar solvents. As a result, its oil resistance and solvent resistance are poor. Generally speaking, hydrocarbons, halogenated hydrocarbons, carbon disulfide, ethers, higher alkanes, and higher fatty acids can dissolve natural rubber, though the degree of solubility is affected by the degree of vulcanization. Lower alkanes, lower esters, and alcohols, on the other hand, are insoluble in natural rubber.
Of course, it’s the universal wrapping mat: lol
Thank you all for your participation. Gasketing is an option, but the pressure in my tank is only 0.1 Mpa – it’s a low pressure level, so using gaskets would be somewhat wasteful
My advice is to avoid using it; it’s uncertain whether the two will mix well. It’s best to use a wrapping pad directly, or at least a basic one if that’s not an option.
Modified polytetrafluoroethylene is used. RPTFE
The use of rubber gaskets is not recommended; rubber gaskets can be used at a minimum at -40°C, and this is the maximum allowable temperature. It is personally recommended to use flexible graphite gaskets or flexible graphite wound gaskets.