Gabaɗaya ana yin ƙofofin akwatunan firij da gilashin da aka saka akan firam ɗin jikin ƙofar, kuma ana ƙara kayan bushewa tsakanin gilashin mai Layer biyu don yin hatimi sau biyu don yin gilashin insulating, kuma ana iya cika shi da nitrogen. tare da ƙananan ƙarancin thermal conductivity.ko helium.An haɗa ƙofar da ɗakin majalisa ta hinges.

Kayan aikin da ake buƙata don sarrafa kofofin gilashi biyu masu sanyi:

Iskar gas ta atomatik akan layi na samar da gilashin, injin butyl, injin rufewa, injin lankwasawa na aluminium, injin mai cikawa, injin canja wurin sarari na aluminum.