Talk about several major indexes of heat conduction oil in hot oil pump

Hot oil pump is a kind of high temperature centrifugal oil pump, is an ideal hot oil circulation pump or as heat transport pump, is the ideal matching pump on the heat exchange equipment. Hot oil pump is widely used in different industries. Its performance and advantages promote the application of hot oil pump in the industry to be used in different environments.
Thermal oil (heat conduction fluid) has a range of physical properties. Such as viscosity, steam pressure, boiling range, initial distillation point, flash point, ignition point, etc. The viscosity index of heat conducting oil is directly related to the heat transfer effect, the smaller the viscosity of heat conducting oil, the faster the flow. The higher its heat transfer efficiency. The steam pressure, flash point and ignition point of heat conduction oil are related to whether the heat conduction oil is volatile and easy to catch fire. If the steam pressure of the oil is small, the flash point, ignition point and spontaneous combustion point are high, the oil is not easy to cause a fire. The initial distillation point of heat conduction oil is related to its safety and use temperature. The higher the initial distillation point is, the better the safety is and the higher the use temperature is.
The properties of heat conduction oil in high temperature heat conduction oil pump usually include the following indicators:

1. Flash point
   The flash point is the low temperature at which the hot oil is directed to form a mixture of its oil vapor and surrounding air under certain heating conditions, and the flash occurs near the flame. Its size indicates the evaporative tendency and safety of the heat conducting oil. When the flash point is low, the fraction in the oil is light, the evaporation is large, and the safety is small. When the flash point is higher, the fraction in the oil is heavier, the evaporation is smaller, and the safety is greater.
2. Acid value
   Acid value is the total amount of organic and inorganic acids in heat conducting oil, that is, the total amount of potassium hydroxide consumed per gram of heat conducting oil. Organic acids are divided into low molecular organic acids and high molecular organic acids. Low molecular organic acids and inorganic acids are corrosive to metals. Especially in the presence of water molecules, corrosion increases. Heat conducting oil is mostly polymer organic acid, polymer organic acid corrosion of equipment is small.
3. Viscosity
   Viscosity is the degree of thin thickness and fluidity of heat conducting oil under specified conditions. When the mechanical load, the speed is the same. The higher the viscosity of the heat conducting oil, the greater the power loss. Because most of the domestic oil is used in high temperature heat transfer stage, almost all brands of heat transfer oil at high temperature viscosity is similar.
4. Carbon residue
   Residual carbon is a mixture of polycyclic aromatic hydrocarbons, colloid and asphaltene, which is easy to decompose and dehydrogenate and condense under the condition of insufficient air. The size of residual carbon can roughly determine the coking tendency of heat conduction oil used at high temperature. The heat transfer coefficient of coking is very different from that of metal, and the energy consumption increases, so the residual carbon is the main factor affecting the heat conduction oil.