Guide Specs

SERIES 54G BELT DRIVE VANEAXIAL FAN, GENERAL DUTY SK-880-54G FEBRUARY, 2002

The Belt Drive Vaneaxial Fan shall be manufactured by Hartzell Fan, Inc.® Series 54, and shall incorporate "G" (General Industrial) Duty Construction features. Standard sizes are 12" through 60". Fan shall have a type VA propeller. The fan shall be a rugged one-piece design consisting of the propeller, the motor and the aerodynamically designed guide vanes. The fan shall be packaged, completely assembled, and ready to install.

The belt drive vaneaxial propeller shall be an airfoil design, 7-bladed, one-piece casting of 319 aluminum in compliance with Federal Specification QQ-A-601E and ASTM B26. The propeller shall be taper bored and attached to the fan shaft using a bolted taper bushing with a key to the fan shaft. A safety plate, bolted to the fan shaft shall provide additional attachment.

Fan housing shall be minimum: 12 gauge sizes 12 thru 21; 10 gauge sizes 26 thru 48; 7 gauge sizes 54 thru 60; rolled commercial quality, carbon steel, welded in compliance with AWS D1.1 standard. Housing shall include continuously welded rolled barstock flanges: 1/4" thickness sizes 12 thru 26, 3/8" thickness sizes 29 thru 60. Housings shall be designed to accommodate multiple shaft sizes and bearing designs as required to cover the entire operating range of fan. Standard surface coating system shall be phosphatized surface preparation with industrial grade air-dry enamel paint.

Fan shaft and bearing selection shall be based on fan operating point and motor horsepower. Fan shaft shall be turned, ground, and polished 1045 carbon steel. Shaft shall be sized with a minimum 1.3 service factor below critical speed. Bearings shall be located in a drive compartment out of the airstream. Bearings shall be heavy duty, self-aligning ball or roller type in cast iron flange mount housings. Bearings shall be relubricable and have extended lubrication lines for continuous service. Minimum L50 bearing life at maximum catalog speed, horsepower, and static pressure shall be 200,000 hours.

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 shall be assembled and test run at service speed at the factory. A triaxial set of vibration levels for each fan bearing shall be measured with seismic transducer in filter in, and filter out mode, and shall be recorded.

Motor shall be per specification. Relubricable motors shall have extended lubrication lines. Motors larger than 30 HP shall be dismounted prior to shipping for mounting on unit at job site. Fixed pitch drives shall be standard. Motor position shall be adjustable for belt tensioning. Belt(s) shall be "V" type, heat, oil, and static resistant and shall be sized for continuous service. Drive Belt losses shall be included in fan horsepower requirements and in AMCA certified brakehorsepower levels.

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 Ratings Seal for Air Performance.