NEW ITT BELL & GOSSETT SERIES PL CIRCULATORS IMPROVE SYSTEM PERFORMANCE AND RELIABILITY

Chicago, IL -- April 2, 1997 -- ITT Bell & Gossett has introduced a new family of maintenance-free, in-line circulators, called the Series PL, that provide a superior alternative to large wet rotor pumps for heating/cooling and plumbing systems.

Unlike wet rotors, the Series PL can handle difficult water conditions at a wide range of temperatures (0º to 225ºF or -18º to 107ºC). The circulators feature an advanced close-coupled dry motor design, plus an exclusive XL11 permanently oil lubricated bearing system to eliminate concerns about system contaminants freezing the bearings.
The Series PL circulator's close-coupled design incorporates a durable carbon/silicon carbide seal and stainless steel faceplate that separate the motor from the volute, impeller and system water. This configuration increases pump
life and efficiency; assures dependable seasonal start ups; and overcomes problems caused by compounds -- such as calcium carbonates and iron oxides -- commonly found in hydronic systems.

The sealed, precision-crafted XL11 bearing system never requires maintenance. Permanently oil lubricated with an advanced, high-temperature, non-hydrocarbon, silicon-free lubricant, the bearings are designed to provide long life and trouble-free operation.

In contrast to wet rotor pumps, the Series PL does not bypass system water through the motor to lubricate and cool the bearings. As a result, all motor energy is delivered to the pumping task, resulting in a 25 percent increase in motor efficiency. All Series PL circulators feature powerful Bell & Gossett motors that deliver the highest performance in their class. Available in cast iron or bronze construction, Series PL circulators also feature:

• A solid "stiff-shaft" design. Constructed of a high-strength alloy steel, the shaft is impervious to thermal stresses that can crack ceramic shafts.
• Precision-machined and balanced alloy steel rotors for superior performance.
• Double-sided, stainless steel neck rings for optimum efficiency.
• Quick-connect wire nut leads and dual knock-outs for fast, sure hook-ups.

For additional information on the new Series PL Circulators and how they can improve performance in specific applications, contact your local Bell & Gossett representative.

Bell & Gossett, a unit of ITT Fluid Technology Corporation, is a leading manufacturer of centrifugal pumps, hydronic specialties, heat exchangers, condensate handling equipment, and packaged systems for variable and constant speed pumping, heat transfer and pressure boosting. For more information, contact ITT Bell & Gossett, 8200 N. Austin Avenue, Morton Grove, IL 60053; phone 847/966-3700.