With 3 layers, stronger in bearing pressure

Inner tank adopts imported porcelain enamel material. It composes of three layers. Thats non-metal inner layer, mixed layer and alloy steel layer. Its good in intension, high pressure resistance, corrosion resistance and heat and cold compact resistance.

Non-metal inner layer is with smooth surface. On-metal film is coated on inner layer and integrated with inner layer after baking under 870 degree high temperature. It can be expanded with inner layer together freely and with big magnesium rod inside for protecting tank free of scale.