Guide Specs

SERIES 53C DIRECT DRIVE VANEAXIAL FAN, C-FACED MOTOR SK-880-53C DECEMBER, 1999

The Direct Drive Vaneaxial Fan, C-Faced Motor shall be manufactured by Hartzell Fan, Inc.®, Series 53C. Standard sizes are 18" through 60". The fan shall be a rugged one-piece design. Fan housing shall contain the propeller, motor, and vane section. Vanes shall be aerodynamic designed to recover energy from the air stream. The fan shall be completely assembled, packaged, and ready to install.

The direct drive vaneaxial propeller, size 18"-48" shall be a 7-bladed one piece cast 319 aluminum airfoil design. Propeller sizes 54" and 60" shall incorporate cast 319 aluminum hollow airfoil blades welded to cast 319 aluminum hub. Casting shall be in accordance with Federal Specification QQ-A-601E and ASTM B26. The propeller shall be taper bored and attached to the motor shaft utilizing taper lock bushing with key bolted to the propeller. A safety plate, bolted to the motor shaft, shall provide additional attachment means.

Fan housing shall be welded construction and shall have continuously welded seams. Fan housings shall be minimum: 10 gauge sizes 18"-21", 7 gauge sizes 22"-48", and 1/4" plate sizes 54"-60". All sizes shall have rolled steel flanges minimum 1/4" plate continuously welded to the steel drum. All flanges have slotted mounting holes. Motor shall be supported on rigid motor mounting plate supported within "C" face motor mounting tunnel. Heavy gauge vanes shall be welded to motor mounting tunnel and fan housing.

Motor shall be "C" Face mounted, totally enclosed fan cooled type. Motor shall be pre-wired with electrical leads optionally extended to a watertight conduit box located on the exterior of the fan housing. Extended lube tubes and grease fittings shall be standard when relubricable motor is specified. Fan shall be designed for mounting in any position form horizontal to vertical. Fan shall be suitable for temperatures up to 104°F, based on motor capability of 40°C.

Fan shall be commercial quality carbon steel and welded in accordance with AWS D1.1 standard. Standard surface coating system shall be phosphatized surface preparation and finished with 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 test run in factory at full speed prior to shipment. Vibration levels in horizontal, vertical, and axial positions with "filter-in" and "filter-out" shall be recorded. "Filter-in" vibration levels at the service speed shall not exceed 0.15 inches per second velocity. "Filter-out" vibration levels for all points shall not exceed 0.25 inches per second. 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 and Sound Performance Rating Seal.