Type .005 DA-ISTP-2C

Pressurized, 2 Compartments, Steel, Internal Spray Tray


Type .005 DA-ISTP-2C pressurized deaerators are recommended for high-pressure boiler applications. Design has trays internal to receiver. The standard .005 design removes dissolved oxygen to a maximum level of .005 cubic centimeters per liter of feed water. Two-compartment design is typically used:

  • on systems having more than 20% return hot condensate
  • where floor space may not be sufficient for a two-tank design
  • when a complete, factory-packaged unit is preferred instead of field wiring and piping of freestanding surge tank and deaerator

Standard deaerator receiver available in black steel and ASME code stamped with an extra corrosion allowance of 1/16" beyond ASME code requirements added. The surge chamber can be plasite-lined or the complete tank made 300 series stainless steel. Unit can built to handle a wide range of flows and pressures; receiver can be customized in terms of diameter, length and height to meet job specific requirements. Options for stress relieving and radiography testing of receiver available upon request.

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. Special faces on seals available upon request. Pumps can be mounted in either a vertical or horizontal orientation.

Deaerator equipped with direction steam injection assembly with stainless steel preheat tube; assembly includes pressure regulator that is 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.