Which kind of rubber soft joint should be chosen for 100 degree water glycol 37Vol.%?

Which kind of rubber soft joint should be chosen for 100 degree water glycol 37Vol.%?

source:Songjiang Group    date:2019-6-11   

Recently, a customer consulted: caliber: DN65, pressure: 1.6 MPa, temperature: 88-100 degree C, medium: water contains 37 Vol.%, how to choose a better service life?

Answer: The above question water containing ethylene glycol/ethylene glycol should choose oil-resistant rubber soft joint, that is, NBR production, but also use high-quality NBR; Songjiang Group oil-resistant rubber soft joint all uses N41 material production, which content reaches about 50%, and the inner rubber, skeleton layer, outer rubber all use NBR.

Question: Is it possible to buy an oil-resistant rubber soft joint on the market?

Answer: I'm not sure, because the inner rubber of oil-resistant rubber soft joint bought on the market is nitrile-butadiene rubber, and the content is less than 10%. The skeleton and outer rubber are ordinary rubber. This kind of rubber can't be used.

Question: Some manufacturers suggest using PTFE. Is that OK?

Answer: No, because his temperature is 88-100 C. If the temperature is below 30 C, the life of lining tetrafluoride will be better. However, the high temperature will lead to the deformation of lining tetrafluoride, which will lead to the blockage of pipeline or the direct rupture of tetrafluoride.

Which kind of rubber soft joint should be chosen for 100 degree water glycol 37Vol.%?

Which kind of rubber soft joint should be chosen for 100 degree water glycol 37Vol.%?