Tray Type Deaerators

240 Tray Type Deaerator 240 Tray Type Deaerator and High Pressure Receiver

Two-stage deaeration, as provided by the Stickle 240/250/275 Series tray type deaerators, significantly reduces the expense of boiler room maintenance and repairs by minimizing the potential for corrosion to boilers, pumps and pipes. This is done by removing the highly corrosive, non-condensible oxygen and carbon dioxide from feedwater before it enters the boiler cycle. Proper deaeration extends the useful life of boiler system by many times.

How it Works

A Stickle 240/250/275 Series deaerator operates at a minimum of 5 psig and 227 degrees F. The deaerator is designed to maintain a dissolved oxygen level of no more than 0.005 cc/l, with a negligible level of carbon dioxide.

  1. Feedwater, containing non-condensible corrosion agents found in all water supplies, enters the vessel through pressure-compensated, spring-loaded valves.
  2. Deflectors on each valve spread feedwater out into a thin, flat sheet of small droplets.
  3. Steam rises to surround the water droplets and heats them to a temperature relative to the pressure being maintained on the unit.
  4. Steam condenses and falls with feedwater onto a large cone, which carries the water to the tray section below the conical outlet.
  5. Heated feedwater is ready for agitation scrubbing by steam.
  6. Feedwater cascades over a series of properly sized trays, all arranged in rows, one above the other and all lying on the same axis. Each row of trays is staggered so the feedwater always falls on the center of each of the trays in next row.
  7. As feedwater moves downward through the rows of trays, the scrubbing of the rising steam removes non-condensible oxygen & carbon dioxide gases.
  8. These non-condensible gases are carried by the steam to the vent condenser, where the steam condenses and the gases are removed through a temperature-controlled orifice.
  9. Deaerated feedwater flow into the boiler cycle, minimizing corrosion potential.

Request a quote for a Stickle Steam Deaerator today! Fill out this easy two-page form and fax it back to us at 317-637-3249.

PDF Stickle Steam Deaerator RFQ Form

Custom Design and Manufacture

Every Stickle 240/250/275 is custom-designed to meet your exact needs in a cost effective manner. Unlike other manufacturers who will sell you “pre-engineereed” units that require costly modifications in the boiler room before they can be placed into your boiler cycle, every Stickle 240/250/275 deaerator is manufactured to meet the exact space and operational needs of your application. That makes for a faster, easier installation and fewer maintenance problems for years to come.

240 vs. 250 vs. 275

The Stickle 240 Series is a tray type deaerator offering a range of flows from less than 10,000 lb/hr to 80,000 lb/hr. The 240 Series maximizes space and cost utilization through a design featuring a single horizontal vessel with both the deaeration and storage function.

The Stickle 250 Series is a tray type deaerator offered in a range of flows from 30,000 lb/hr to 500,000 lb/hr and greater. The 250 is designed utilizing a conventional two-vessel arrangement—An upper vessel for deaeration and a separate lower horizontal vessel for storage.

The Stickle 275 Series is a tray type deaerator with a vertically oriented vessel. Flow rates range from less than 10,000 lb/hr to over 500,000 lb/hr. The 275 series utilizes a single vessel configuration for flow rates up to 120,000 lb/hr. For applications of the 275 series please call the factory.


The 240/250/275 Series’ diversity of configurations allows the customer maximum flexibility in deaerator selection. From this beginning, Stickle can design a deaerator which is virtually tailor-made for practically any application.

At Stickle, each job begins with a clean sheet of paper. Extensive computer modeling and engineering is performed on each order to achieve optimum component design, selection and compatibility. Exclusive use of computer aided design and drafting facilitates accurate and quick execution of vital submittal and production drawings.

Built Stronger to Last Longer – Materials

A Stickle 240/250/275 Series deaerator is built to standards excedding ASME Code requirements. A superior grade of materials is selected for the internals. AISI 316 stainless steel-more corrosion-resistant than the materials used in other deaerators-is utilized as standard material for the trays. Minimum thickness is 18 gauge. Where more severe conditions exist, appropriate alloys may be substituted.

The riveted construction of the trays further reduces the susceptibility of corrosion.

For the vessel itself, Stickle 240/250/275 Series deaerators feature only ASTM 516-70 carbon steel. On average, this steel offers 27% greater yield strength than ASTM 285-C carbon steel and has a much finer grain structure than the widely used ASTM 515-70. This differences lends increased strength and corrosion resistance, leading to increased longevity and superior resistance to material failure due to hydrogen embrittlement and stress cracking in weld-affected zones.


We're so confident our 240/250/275 Series deaerators will stand up to even the most demanding conditions that Stickle backs every deaerator with the industryss only 10-year non-prorated warranty. The warranty covers the vessel, spray device(s) and all internals manufactured by Stickle Steam. That's protection you can rely on!

Maximum Operating Efficiency

You can also rely on your Stickle 240/250/275 Series Deaerator for maximum operating efficiency, thanks to innovative design features like:

  • Pressure-compensated, spring loaded spray valves that provide even spray patterns even under changing conditions and mineral build-up from incoming water
  • Spray valve deflectors that spread feedwater into a thin, flat sheets of small droplets for faster, more efficient heating and lower heating costs
  • Custom-designed storage capacity, to fit your exact needs
  • Access opening for easy removal of tray sections
  • Compact design for maximum space efficiency

The Stickle Concept

Singular responsibility is quickly becoming a primary objective in operations where a variety of functions and equipment is involved. Why? Singular responsibility keeps one principal in a position of responsibility for a variety of functions, eliminating the guesswork of who to contact in the event a question or problem arises.

Singular responsibility is a keystone of the Stickle Concept. We have the capability of providing singular responsibility for the following functions:

  • Condensate Return
  • Water Treatment
  • Deaeration
  • Continuous Blowdown Heat Recovery
  • Bottom Blowdown