Scallon Controls and EPI Join Forces. Beaumont, TX, August 1, 2017– Scallon Controls is pleased to announce the transition of EPI (Energy Power, Incorporated) to become a Scallon Controls company. EPI has been a trusted source for pressure and safety relief valves, automated and manual valves, and instrumentation for over 40 years in the Southeast Texas Region. EPI is a National Board of Boilers and Pressure Vessel Inspection certified center with NB,VR and UV stamps of approval. These provide verified capability for repair of all brands of pressure and safety relief valves, in service testing of valves, and factory certified.