Fans series with backward curved blades - ex. 12.
Versions:
Standard: PP welded housing - PP / INOX / Fe+ebonite welded impeller - epoxy painted frame - stainless steel screws
ATEX 
: PP-el antistatic welded housing - PP-el / INOX / Fe+ebonite welded impeller - epoxy painted frame - stainless steel screws
Variants available for both versions upon request as list. 
Rated data
Motor connection diagram
Rotation fan's table
Resistance chemical agent
Arrangements
