Economizer
60. Economizer - a device heated by fuel combustion products and intended for heating or partial evaporation of water entering the steam boiler
Source: Order of the State Atomic Energy Supervision Authority of Russia No. 4, Order of the State Industrial Safety Inspection Authority of Russia No. 98 dated 19.06.2003 "On Approval and Introduction into Force of Federal Norms and Rules in the Field of Nuclear Energy Utilization 'Rules for Design and Safe Operation of Steam and Hot Water Boilers for Nuclear Energy Facilities'" (together with "Rules... NP-046-03") (Registered by the Ministry of Justice of Russia on 10.07.2003 No. 4884)