... fan Explosion-proof,safe and reliable in operation,small size,light weight,and low noise,well anticorrosive. CWZ Series Small-sized axial flow ... speed & length of the vanes, the fans have low noixe, small size, tight weight, stable performance, ect. In the course of ... , anti-swing, vi-bration resistance, shock resistance, stable running and safe reliable.The fans can be used with 380V/220V, 50 ...