www.phcppros.com/articles/14014-armstrong-self-regulating-variable-speed-fire-pump

Armstrong Self-Regulating Variable-Speed Fire Pump
August 26, 2021
Armstrong Fluid Technology has unveiled its industry-leading, Design Envelope Fire Pump unit along with Fire Pump Manager, a new, connected service for tracking pump performance. In addition to providing important new safety benefits, Armstrong’s new Design Envelope Fire Pump holds the distinction of being the first self-regulating variable-speed fire pump to meet NFPA-20 (2019 Edition), Section 4.8 standards.
Armstrong Fluid Technology