Guide Specs

SERIES 50 SPECIAL DUTY DIRECT DRIVE VANEAXIAL FAN, TYPE VA SK-880-50 NOVEMBER, 1997

The Special Duty Direct Drive Vaneaxial Fan, Type VA, shall be manufactured by Hartzell Fan, Inc.®, Series 50. Standard sizes are 12" through 60". The fan shall be a rugged two-piece design. One section contains the propeller and motor. The second 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 duct 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 large volumes of air at 2" to 5" static pressure.) 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 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 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 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.