The sheath material of GYQ tubular components are No 10 steel,The max opertating-temp is 300 C,Lt is used for heating air in duct, oven and tunnel.

• GYQ型系列空气用金属管状电热元件，GYQ型管状电热元管材为：10号钢、不锈钢，最高介质温度550摄氏度。适用于各种空气加热系统，可作为烘箱通道和加热电炉的发热元件.