Armstrong Pumps has launched the ARMflo E10 and E11 close-coupled, dry motor circulators for commercial and large residential high head applications. The E Series features advanced motor technology and an efficient hydraulic design, as well as a compact motor that is 30% smaller than other dry motor circulators and is made with permanently lubricated stainless steel bearings. Designed for extended durability and very quiet operation, the ARMflo E Series features the EnviroSeal mechanical seal, which can be field-repaired in less than five minutes. Armstrong Pumps.