axial flow fan Explosion-proof,safe and reliable in operation,small ... ,well anticorrosive. CWZ Series Small-sized axial flow fan 1,GeneralCWZ series marine small sized axial fans are suitablefor ventilation of kitchen, ... 440V/220V 60HZ.3, StructureThe fans can be made into two structure types, type 1(tube type), type 2(porthole type ... casing is welded by steel sheet. CWZ Series Small-sized axial flow