The Tray DA relies on internal spray valves, a cascading series of trays, a vent condenser, and fresh steam. This creates conditions for large flows of make-up water to release the O2 and CO2 naturally. The upper deaeration vessel is equipped with internal, stainless steel vent condenser and spray valves that release free O2 and CO2 from make-up water as it enters the top of the vessel. Condensate returns and boiler supplied steam enter the same vessel from the sides, heating make-up water as it flows down through a stacked column of trays to enter the lower storage vessel. The latent heat from the steam combined with the increased surface area of the trays drives additional free O2 and CO2 from the water. Ultimately, all O2 in excess of 0.005 cc/liter is removed and titratable free CO2 levels are reduced to zero.
Tray deaerators can be configured for intermittent duty (on-off), continuous-run with recirculation loop, or precisely modulated by a Variable Frequency Drive control for ease, efficiency and energy savings. Precision Boilers also offers solenoid or air actuated valves with proportional control features for more precise level control.