Guide Specs

SERIES 03Q BACKWARD CURVED CENTRIFUGAL FAN, SQUARE TYPE, SINGLE WIDTH SK-880-03Q NOVEMBER, 1997

The belt drive Backward Curved Centrifugal Fan, Square Type, Single Width, shall be manufactured by Hartzell Fan, Inc.®, Series 03Q, ARRG. 2 (with or without motor mounted), Class I. Wheels available are the backward curved (BC, 12" - 33") or the airfoil (BA, 18" - 33"). Rotation as determined by the drive side of the fan, shall be clockwise or counter-clockwise. Fan housing, for sizes 12" through 33", shall be available in four fixed discharges, and shall be top horizontal(TH), bottom horizontal(BH), up blast(UB), or down blast(DB). The fan shall be packaged, completely assembled and ready to install.

The fan housing and base shall be a heavy gauge commercial quality carbon steel suitable for temperatures up to 200° F. The housing and wheels shall be continuously welded in compliance with AWS D1.1 standard. The wheels shall be commercial quality carbon steel with single thickness airfoil blades or double thickness hollow airfoil blades and have non-overloading horsepower characteristics. The wheel shall be mounted to the fan shaft with a split taper bushing. The shafts shall be ground and polished. The fan bearings shall be heavy duty, self-aligning ball or roller type (depending on fan size, motor HP, and performance) relubricatable for continuous service. They shall have a minimum L10 life of 50,000 hours. The belts shall be an oil, heat, and static-resistant type, oversized for continuous duty.

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. The fan performance shall be based on tests conducted in Hartzell's AMCA accredited laboratory and conducted in accordance with the latest revision of AMCA Standard 210 for air performance and AMCA Standard 300 for sound.