Products > Special Duty Products > Marine Duty Fans and Blowers > Guide Specs

The Special Duty Direct Drive Duct Vaneaxial Fan, Type VB, shall be manufactured by Hartzell Fan, Inc., Series 56. Standard sizes are 14" through 48". The fan shall be a rugged two-piece design. One section contains the vanes which are aerodynamic in design to recover energy from the airstream. The fan shall be packaged, completely assembled and ready to install.

The vaneaxial propeller shall be an airfoil design, 7-bladed, one-piece cast of 319 aluminum in compliance with Federal Specification QQ-A-601E and ASTM B26. (It is scientifically designed to move low volumes of air at high static pressures of 4Ó to 14Ó.) The propeller shall be straight bored and attached to the motor shaft utilizing a key and setscrews. A safety plate, bolted to the motor shaft shall also provide additional attachment. Propellers shall be ground and buff finished.

All sizes shall have rolled steel flanges continuously welded to the steel drum. All flanges shall have mounting holes. Rigid motor mounts provide support for the motor. Motors shall be totally enclosed air over type. Extended lube tubes and grease fittings shall be standard when relubricable motors are specified. Blowers shall be designed for mounting in any position from horizontal to vertical.

Fan housings shall be minimum 1/4" rolled commercial quality, carbon steel and continuously welded in compliance with AWS D1.1 standard. Standard surface coating system shall be phosphatized surface preparation with an industrial grade air dry enamel paint.

The fan assembly shall be dynamically balanced at the Hartzell factory prior to shipping. Fans shall be balanced to the American National Standards Institute, Std. S2.19-1989 ÒBalance Quality of Rotating Rigid BodiesÓ, Grade G6.3. Fans shall be manufactured in accordance with Hartzell's standard quality assurance procedures. Fan performance shall be based on tests conducted in Hartzell's AMCA accredited test laboratory in accordance with the latest revision of AMCA Standard 210 for air performance and AMCA Standard 300 for sound. Fans shall be licensed to bear the AMCA Certified Air Performance Rating Seal.