W-H-2904, FEDERAL SPECIFICATION: HEATERS, FLUID, DEAERATING (FOR WATER ONLY) 1,000 TO 1,600,000 POUNDS PER HOUR CAPACITY (02 JUN 1997) [SUPERSEDING MIL-H-17660D] [NO S/S DOCUMENT]

W-H-2904, FEDERAL SPECIFICATION: HEATERS, FLUID, DEAERATING (FOR WATER ONLY) 1,000 TO 1,600,000 POUNDS PER HOUR CAPACITY (02 JUN 1997) [SUPERSEDING MIL-H-17660D] [NO S/S DOCUMENT]., This specification covers direct-contact deaerating heaters either vented to atmosphere or under pressure ranging between 3 pounds per square inch gage and 15 psig (20.7 kilopascals (kPa (gage) and 103.4 kPa (gage)).