The expansion tank is designed to compensate for temperature increases in residential and industrial heating systems. The material of the expansion tank is steel, the material of the flange is zinc-plated steel with a plastic insert in contact with water, the membrane material is EPDM, the tank colour is powdered thermoemalline material of the body and the substrate is carbon steel; membrane - EDPM vulcanized rubber; the thickness of the walls - at least 1,5 mm; volume - 12 liters; maximum pressure - 10 bar; the nominal air pressure - 2 bar; the water temperature range is (-10...+110) C; diameter of the tube: 3/4";