Guide Specs

SERIES 34 FIBERGLASS BELT DRIVE DUCT FAN SK-880-34 NOVEMBER, 1997

The Fiberglass Belt Drive Duct Fan shall be manufactured by Hartzell Fan, Inc.®, Series 34. Standard sizes are 12" through 60". The fan shall be packaged, completely assembled and ready to install.

The resin used on fiberglass axial flow fans shall be Ashland Hetron 693 which is a polyester resin with 3% antimony oxide added to achieve a Class I flame spread rate of below 25 per ASTM E84 tunnel test standards and NFPA Code 91 for blower and exhaust systems, which is OSHA approved.

The propeller shall be airfoil design 6 bladed one piece construction of solid fiberglass with an aluminum insert molded to the hub for secure attachment to the shaft through 48" size. The 54" and 60" sizes shall be either 4 or 6 blades clamped in a 2-piece hub. The hub shall be assembled with Type 304 stainless bolts and mounted on fan shaft with a tapered bushing. A raised ring shall allow the bushing and locking bolts to be covered with a fiberglass and resin patch to protect them from corrosives. Fiberglass propellers, fan housings, and components shall be capable of being used in temperatures up to 200° F. Fan construction shall conform to ASTM Standard D4167 for fiber reinforced plastic fans and blowers.

Fan housings shall be constructed of solid fiberglass including the flanges which have drilled mounting holes. Motor mountings shall be steel plate coated with resin and mounted on the drum exterior with glass mat, cloth, and resin. The encapsulated assembly base, zinc plated steel riser bolts and epoxy coated motor base provide support for the motor. Motors shall be open end protected. All other hardware shall be Type 304 stainless steel.

Fan shafts shall be ground and polished Type 304 stainless steel. Bearings shall be located in a sealed drive compartment to prevent corrosive element entry. Bearings shall be heavy duty, self-aligning, and shall have extended lube tubes and be relubricable for continuous service with a minimum L10 life of 50,000 hours. Variable pitch sheaves shall be standard on fans up to and including 10 HP and belts shall be sized for continuous service. Fans shall be designed for mounting in any position from horizontal to vertical.

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 and in accordance with 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.