Steel insulating grain retaining plate (door) is devided into plate grain retaining plate (door), triangular grain retaining plate (door) and arc grain retaining plate (door).

Grain retaining door formed by grain retaining plate is manufactured according to national standard drawing. It has features such as flexible switch, simple operation, long service life, and etc.

The product has features such as light weight, flexible installation, convenient disassembly, and etc.