1. Ventilation butterfly valve is welded with steel plate. It has the characteristics of short structure size, light weight and convenient installation.

2. Compact structure, light weight, easy to install, small flow resistance, large flow, avoid the impact of high temperature expansion, easy to operate.

3. Without connecting rod and bolt, it has reliable operation and long service life. It can be installed in multiple stations without the influence of medium flow.

4. Small torque, easy operation, labor saving and flexibility.

5. Adopt suitable materials to meet low, medium and high temperature and corrosive medium.

6. Good sealing effect, small leakage and good regulation performance.