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HVAC Riser Isolation Valves V3, and Steam Station and Steam Converters Replacement, New Executive Office Building, Washington, DC


The New Executive Office Building (NEOB) had an existing high pressure steam piping configuration creating an extremely dangerous life safety entrapment condition. This Design Build project provided the redesign and installation of new steam station components creating a safe working environment, while bringing it into code compliance. The existing domestic hot water storage tanks were beyond their life expectancy and were replaced with customer requested Spirax Rediheat instantaneous heaters, freeing up valuable space and saving energy. Overall improvements vastly reduced maintenance and the evacuation time from the mechanical room.

The team also provided redesign and installation of chilled water control valves and electronic isolation valves for the floor loops on the 3rd and 10th floors. Additional work extended the piping runouts on the 10th floor from the valves to the fan coil units and connectivity to DDC and TAC systems to the main engineer’s automation control room. This project’s special requirements involved timed phasing, removal and replacement of asbestos insulation and fireproofing.

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