What is a special valve for asphalt tank trailer?

Asphalt tank truck special valve is mainly used in tank trucks that transport asphalt and crude oil. Due to the high viscosity of asphalt and crude oil, when the tank truck is unloading, it is necessary to use a pipeline to unload, which is easy to block the pipeline. With the help of this special valve, the pipeline can be unblocked and the unloading speed is faster.

Asphalt is a dark brown complex mixture composed of hydrocarbons of different molecular weights and their non-metallic derivatives. It is a kind of high-viscosity organic liquid. It mostly exists in the form of liquid or semi-solid petroleum. The surface is black and soluble in carbon disulfide and carbon tetrachloride. Asphalt is an organic gelling material that is waterproof, moisture-proof and anti-corrosive. Asphalt can be mainly divided into three types: coal tar asphalt, petroleum asphalt and natural asphalt: among them, coal tar asphalt is a by-product of coking. Petroleum asphalt is the residue after crude oil distillation. Natural asphalt is stored underground, and some form mineral layers or accumulate on the surface of the earth’s crust. Asphalt is mainly used in industries such as coatings, plastics, rubber, and paving roads. Liquid asphalt and coal tar are generally transported by tank trucks.

Crude oil, people usually call unprocessed petroleum crude oil. A dark brown viscous oily liquid with green fluorescence and a special smell. It is a mixture of various liquid hydrocarbons such as alkanes, cycloalkanes, aromatic hydrocarbons and olefins.

The main components are carbon and hydrogen, accounting for 83-87% and 11-14% respectively; there are also small amounts of sulfur, oxygen, nitrogen and trace amounts of phosphorus, arsenic, potassium, sodium, calcium, magnesium, nickel, iron, vanadium and other elements. The specific gravity is 0.78-0.97, the molecular weight is 280-300, and the freezing point is -50-24℃. Crude oil can be refined and processed to obtain various fuel oils, solvent oils, lubricating oils, greases, paraffin, asphalt, liquefied gas, aromatics and other products, providing fuel, raw materials and chemical products for various sectors of the national economy.