Thermal oxidation stability method is 175 ℃, 72 hours, and fully considered the method of conducting oil oxidation factors influence the design. But the only drawback is not enough heat and time is short, the project is also not comprehensive enough to observe and assess the project also allowed less than 50mg / 100g of sediment quality HTF exists, we believe that this sediment should not be allowed to exist, and there are more many units are not tested for this indicator, simply marked "closed system of the product is limited to use" HTF in the conclusions of the examination, YD400 thermal conductivity means that the HTF is sealed under nitrogen use case oil, if the user does not blanketing HTF product problems on the use and production of conducting oil companies no significant relationship YD320 synthetic heat transfer oil, and responsibilities are generally in users. Through extensive research we believe that even if HTF through years of use, carbon residue should also increase the value of the HTF is very low, and this small amount of residual carbon and oxidation products can not affect the heat accumulation, and use for many years in the HTF not leave any black marks on the wall, and the cleanliness of the oil well, there will not be any light transmission problem, of course, will not affect heat transfer problem, which requires a high temperature heat transfer oil superior oxidation ability even at a high temperature by oxidation without leaving any marks on the wall dark, let alone produce a precipitate, and 95% of the current commercially available HTF do not have this best characteristics. HTF ingredients | Lishui HTF | Fengqiu County Taihang Chemical Co., Ltd. is provided by Fengqiu County Taihang Chemical Co., Ltd. Fengqiu County Taihang Chemical Co., Ltd. (www.hndaoreyou.com) strong, credible, in Xinxiang of fuel oil and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Fengqiu County Taihang Chemical Co., Ltd., and you hand into the brilliant, for a better future!