Made of long-lasting, hardwearing materials, it ensures many years of noise-free, trouble-free service. Positive Mechancial Seal: A tried and proven method of preventing water leakage, the well-known “ARMSEAL” construction is an often imitated feature of the ARMSTRONG circulator. Centrifugal Impeller: Balanced impeller of centrifugal design ensures maximum water delivery. Shafts have integral thrust collars, heat treated to provide long life under severe duty conditions. Oversized Shaft: ARMSTRONG circulating pumps have oversized shafts of special alloy steel, machined to exacting tolerances. Body: Radially-split body can be left in the line while servicing the pump, eliminating needless disconnecting of pipes. Give us a call toll-free for help on which pump is right for your application. The Armstrong S & H series pumps are available with either cast iron or bronze bodies. Armstrong Series S & H in-line circulating pumps are ideal for use in hydronic heating and cooling, domestic water systems, multi-stage zoning, and general industrial service.
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