Spray Flow II .005 Atmospheric Deaerator


Product Overview
Direct replacements for all Schaub Engineering designs



  • CONSTANT RECYCLING guarantees deaeration of all dissolved oxygen in excess of .005 cc/liter from 0% to 100% of deaerator capacity
  • UNIQUE FULL PARTITION DEAERATOR DESIGN accepts gravity returns to the atmospheric scrubbing section along with make-up and pumped returns. Deaerating section accepts trapped returns for preferential use of flash steam
  • ELECTRONIC INSTRUMENTATION FOR MODULATING DEAERATOR LEVEL control includes a HART compatible differential pressure transmitter, PID controller, and motorized control valve
  • SEPARATE DEAERATING & MIXING SECTIONS offer a two stage continuous cycle which provides .005 cc/l deaerated water during all load conditions regardless of surges from the system
  • ONLY STAINLESS STEEL DEAERATOR components come in contact with undeaerated water
  • ATMOSPHERIC NON-CODE DEAERATOR VESSEL requires no annual shutdown for inspection
  • CUSTOM ENGINEERED PACKAGED DEAERATOR SYSTEM includes boiler feedwater pumps and quality components to insure reliable


  • Industrial Steam’s exclusive constant recycling feature and the use of a partitioned receiver provide the advantages of a two-tank deaerator system as a single package. These advantages are available without the necessity for onsite erection or field installed piping. Expanded deaerating sections are standard for surge condensate loads
  • GUARANTEED DEAERATOR PERFORMANCE FROM 0% to 100% of capacity regardless of load conditions is unmatched by any other deaerator
  • CUSTOM ENGINEERED PACKAGED DEAERATOR SYSTEM results in a small foot print, minimal onsite installation costs, and a single source of responsibility for all major components

Spray Flow II Atmospheric Deaerator – Operation


Modulated make-up water is sprayed into the deaerator through a stainless steel spring loaded nozzle and into a stainless steel internal vent condenser located in the scrubbing section. The deaerator nozzle produces a thin conical sheet of water which condenses the vapors while permitting oxygen to exit through the unrestricted atmospheric vent. Pumped low temperature returns are also sprayed through the deaerator nozzle. Gravity returns flow unrestricted to the deaerator scrubbing section.

The combined make-up and returns in the deaerator scrubbing section are heated with steam and recycled deaerated water from the deaerating section.

Both the steam and deaerated water enter the deaerator scrubbing section through separate stainless steel manifolds. The perforated steam manifold provides jets of steam to vigorously scrub the major portion of the dissolved oxygen from the make-up, pumped returns, and gravity returns. The temperature in the scrubbing section is controlled at 210ºF (at sea level), which assures the release of the majority of the dissolved oxygen without flash loss.

The scrubbing section water, which is nearly fully deaerated, is continuously recycled to the deaerating section where it is sprayed through stainless steel, wide-angle, full-cone nozzles. Steam enters the deaerating section in response to the temperature in the scrubbing section. Since the cycle is continuous, pure steam is always available for final deaeration. The last traces of oxygen are removed at the point of contact with the purest steam. Excess, fully deaerated water flows continuously from the deaerating section to the scrubbing section through the stainless steel recycle manifold. Trapped returns are piped to the deaerating section where the flash steam is preferentially used for final deaeration.

Since the recycle pump capacity exceeds the deaerator capacity by at least 25%, the deaerator is able to meet .005 cc/l. From zero to 100% load. This same feature also enables the deaerator to supply fully deaerated water to the boiler on start-up. Rapid load changes and on-off boiler feedwater controls, which are very troublesome for other atmosphereic deaerators, will not affect the Spray Flow II Atmospheric Deaerator’s performance or operation.

Spray Flow II Atmospheric Deaerator – Capacity

IS_Spray_Flow_II_ChartConsult Factory for systems over 300,000 lbs./hr.

* Overall height includes 48″ stand.
** Shipping weight does not include boiler feed pumps or any optional equipment


  1. Make-up Controller
  2. Make-up Control Valve
  3. Make-up Nozzle (Stn. Stl.)
  4. Vent Condenser (Stn. Stl.)
  5. Pressure Switch
  6. Spray Nozzles
  7. Recycle Pump Motor
  8. Recycle Pump
  9. Boiler Feed Pump Motor
  10. Boiler Feed Pump
  11. Magnesium Anode
  12. Ball Valve (Column Drain)
  13. Level Transmitter
  14. Coupling
    (Recycle Pump Discharge)
  15. Coupling
    (Recycle Pump Suction)
  16. Gate Valves
    (Recycle Pump Suction)
  17. Ball Valves (Drain)
  1. Globe Valve
    (Make-up Inlet)
  2. Ball Valves
    (Make-up Inlet)
  3. Y-Strainer
    (Make-up Inlet)
  4. Thermometer
    w/ Thermowell
  5. Temp Control Valve
  6. Control Panel (NEMA 1)
  7. Ball Valve
    (Column Isolation)
  8. Ball Valve (Discharge)
  9. Check Valve (Discharge)
  10. Low Water Alarm
  11. High Water Alarm Switch
  12. Y-Strainer (Steam Inlet)
  13. Emergency By-pass Valve
  14. Gauge Glass Assembly
  15. Couplings
    (BF Pump Suction)
  16. Ball Valve
    (BF Pump Suction)
  17. Pressure Gauge w/Cock (0/60in H20)
  1. Starter (Recycle Pump)
  2. Low Water Cut Off Switch
  3. Pressure Gauge
    (0-60 psig)
  4. Chemical Feed Quill
  5. Gate Valve
    (Recycle Discharge)
  6. Check Valve
    (Recycle Discharge)
  7. Pressure Gauge 0/300 psi
  8. Orifice Union
  9. Gauge Glass Assembly
  10. Ball Valve (Vacuum Breaker Line)
  11. Vacuum Breaker
    (Check Valve)
  12. Starter (BF Pump)
  13. Ball Valve (Recirc)
  14. Check Valve (Recirc)
  15. Orifice Union (Recirc)