Guide Specs

SERIES 28 FIBERGLASS DIRECT DRIVE DUCT FAN SK-880-28 NOVEMBER, 1997

The Fiberglass Direct Drive Duct Fan shall be manufactured by Hartzell Fan, Inc.®, Series 28. 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 is 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. Fan construction shall conform to ASTM Standard D4167 for fiber reinforced plastic fans and blowers. The propeller shall be airfoil design, 6 bladed one piece construction, with the exception of the 54" and 60" which are either 2 or 4 bladed. The propeller shall be die formed of cloth mat plus woven roving construction of solid fiberglass with an aluminum insert molded into the hub for secure attachment to the shaft. Propellers shall be given two coats of resin before final assembly. The airfoil propeller shall not have an aerodynamic stall characteristic.

Fan housings shall be rugged and shall be constructed of solid fiberglass including the flanges which have drilled mounting holes. Motor mountings shall be solid fiberglass. Interior and exterior surfaces of the housing shall have one coat of heavy resin applied. Motors shall be totally enclosed air over type. Standard internal hardware shall be austenitic stainless steel. Fiberglass fan housings and components shall be capable of being used in temperatures up to 200° F.

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.

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.