Guide Specs

SERIES 44 SPECIAL DUTY DIRECT DRIVE DUCT AXIAL FAN SK-880-44 NOVEMBER, 1997

The Special Duty Direct Drive Duct Axial Fan shall be manufactured by Hartzell Fan, Inc.® Series 44. Standard sizes are 12" through 60". Fans will be supplied without a guide vane section. The fan shall be packaged, completely assembled and ready to install.

The duct axial propeller shall be an airfoil design, 6-bladed, one-piece cast of 319 aluminum in compliance with Federal Specification QQ-A-601E and ASTM B26. (It is the result of many years of research and development and combines the best features of a vaneaxial propeller and the economical performance of a Hartzell duct fan.) Its design is rugged; its function is to move large volumes of air at medium static pressures of 1" to 4". The airfoil propeller shall not have an aerodynamic stall characteristic. Propellers shall be retained on the motor shaft utilizing a split taper bushing. Propellers shall be ground and buff finish.

Fans shall have rolled steel flanges continuously welded to the steel drum. All flanges have mounting holes. Rigid motor mounts provide support for the motor. Motors shall be totally enclosed fan cooled. 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 in accordance with AMCA Standard 204-96, fan application category BV-3 (comparable to 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 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.