normally we can provide two types, one is tjfa the other is tjfc. as for tjfa, it means the motor directly drive impeller rotation; while for tjfc, it means motor drive impeller rotation through belt; see the following two types photos:
● Cartons quantity;
● Conveying pipe's diameter;
● Conveying distance;
● position of die-cutting machine, carton crusher, paper-cutting machine, etc.
● Material shall be non-hypergolic and non-corrosive air; temperature less than 80 degree;
● Conveying air or materials not contain high temperature, acid, soda, oil, metal scraps or very hard scraps;
● Considering low noise, customer can add silencer in fans' air inlet and outlet;
● It is necessary to change blades when they are worn out.