9kg Portable Dry Powder Fire Extinguisher

With the support of our expert our company is dedicated Exporter Manufacturer and Supplier of 9kg Portable Dry Powder Fire Extinguisher in Taian Shandong China. The chemical foam extinguisher was invented in 1904 by Aleksandr Loran in Russia based on his previous invention of fire fighting foam. Loran first used it to extinguish a pan of burning naphtha.[3] It worked and looked similar to the soda-acid type but the inner parts were slightly different. The main tank contained a solution of sodium bicarbonate in water whilst the inner container (somewhat larger than the equivalent in a soda-acid unit) contained a solution of aluminium sulphate. When the solutions were mixed usually by inverting the unit the two liquids reacted to create a frothy foam and carbon dioxide gas. The gas expelled the foam in the form of a jet. Although liquorice-root extracts and similar compounds were used as additives (stabilizing the foam by reinforcing the bubble-walls) there was no "foam compound" in these units. The foam was a combination of the products of the chemical reactions: sodium and aluminium salt-gels inflated by the carbon dioxide. Because of this the foam was discharged directly from the unit with no need for an aspirating branchpipe (as in newer mechanical foam types). Special versions were made for rough service and vehicle mounting known as apparatus of fire department types.