Type .005 DA-CI and .005 DA-CI-2T atmospheric deaerators are recommended for high-pressure boiler applications. Designed with stainless steel trays in external black steel dome that is removable from the receiver. The standard .005 design removes dissolved oxygen to a maximum level of .005 cubic centimeters per liter of feed water. The atmospheric deaerator provides unrestricted venting of the non-condensing gases, allows for gravity returns and generally produces less steam loss under partial load conditions than a pressurized deaerator. Unit designed so that undeaerated water only comes in contact with stainless steel to prolong life of unit.
The amount of hot condensate returns influences which design is most appropriate for applications. A single-tank design (DA-CI) is typically used on systems having 80% or more make-up water. A two-tank design (DA-CI-2T) that includes a standalone surge tank is typically used on systems having more than 20% return hot condensate.
A close-grained, cast iron receiver is provided with a standard 20-year warranty against corrosion failure for maximum corrosion resistance. Standard receiver sizes available up to 500 gallons using a single tank; larger capacities possible with customized designs using multiple receivers.
Number of pumps on unit depends upon number of boilers to be supported and stand-by specifications. Pump motors can be either 1750 RPM or 3500 RPM, single or three phase. Unit equipped with single stage or multi-stage pumps depending upon operating conditions. Pumps bronze-fitted with industry standard motors and mechanical seals rated for temperatures up to 300°F. Higher temperature seals and special faces available upon request. Pumps can be mounted in either a vertical or horizontal orientation.
Deaerator equipped with direct steam injection assembly with stainless steel preheat tube; assembly includes temperature regulator that can be either pneumatic or self-contained. Other accessories include but not limited to gauge glass assembly thermometer, inlet strainer, butterfly isolation valve, low-water cut-off or alarm switch, electrical control panels and tank insulation.