Boiler Feed Tanks Deaerators

• CONSTANT RECYCLING DEAERATOR guarantees deaeration of all dissolved oxygen in excess of .005 cc/liter from 0% to 100% of deaerator capacity
• 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 components come in contact with undeaerated water
• A.S.M.E. CODE and NATIONAL BOARD stamped receivers at 50 psig is standard
• CUSTOM ENGINEERED PACKAGED DEAERATOR SYSTEM and low NPSH pumps require a small foot print and minimal headroom

• 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. The STEAM FLOW also carries a 10-year vessel guarantee without the use of a lining.
• CUSTOM ENGINEERED PACKAGED DEAERATOR SYSTEM and low headroom with low NPSH pumps. Selection of quality components insures reliable service, and there is a single source of responsibility for all major components.

Makeup water is sprayed into the deaerator through a stainless steel spring-loaded nozzle and into a stainless steel internal vent condenser which is located in the mixing section. This incoming water is heated instantly by direct contact with steam. Returned condensate enters the deaerator below the water level to eliminate pressure decay caused by surging returns.

The deaerated water is then pumped into the deaerating section where it is blasted through stainless steel wide angle, full-cone unrestricted nozzles. The last traces of oxygen are shaken out at the source of the purest steam. The pumped transfer rate is approximately 125% of deaerator capacity, which enables the deaerator to furnish the boiler with deaerated water from start up. Deaeration is accomplished from 0% to 100% load, and thermal stratification is eliminated.

Excess deaerated water, which is not required by the boiler, recycles into the deaerating section through the compartment overflow. This deaerated water is blended with makeup water and is constantly rescrubbed. Non-condensable vapors are expelled from the top of the deaerator through the internal vent condenser.

Consult 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

29. Check Valve (Recirculating)
30. Discharge Pressure Gauges W/cock (Recycle)
31. Discharge Ball Valve (Recycle)
32. Discharge Check Valve (Recycle)
33. Low Water Alarm & Cut-off Switch
34. High Water Alarm Switch
35. Emergency By-pass (not shown)
36. Ball Valve (Drain)
37. Y-strainer (Steam Inlet)
38. Overflow Trap
39. Chemical Feed Quill
40. Ball Valve (Column Isolation Valve)

• COUNTER FLOW TRAY design deaerator provides guaranteed removal of all dissolved oxygen in excess of .005 cc/liter from 5% to 100% of deaerator capacity.
• ELECTRONIC INSTRUMENTATION FOR MODULATING DEAERATOR LEVEL control includes a HART compatible differential pressure transmitter, PID controller, and motorized control valve.
• MULTIPLE DEAERATOR CONFIGURATIONS: vertical single tank, standard “tank car” type, or flanged heater section, all providing the same high quality deaeration.
• ONLY STAINLESS STEEL components come in contact with undeaerated water. Deaerator trays and tray box are all stainless steel.
• A.S.M.E. Code and National Board stamped receivers – 50 psi. Standard vessel options include stress relieving, non-destructive testing and full vacuum.
• CUSTOM ENGINEERED PACKAGED DEAERATOR SYSTEMincludes boiler feedwater pumps and quality components to insure reliable service.

• Counter Flow Tray type deaerators are capable of accepting high percentages of condensate returns without adverse effects on performance. This is possible because the deaeration process does not require a flow of steam for scrubbing. All second stage scrubbing is done by the cascading process through the trays. The counter flow design provides maximum performance because the cleanest incoming steam contacts the water that requires final deaeration, thus stripping out the last traces of oxygen.
• GUARANTEED DEAERATOR PERFORMANCE from 5% to 100% of load standard sizes ranging from 6,900 lbs/hr to 300,000 lbs/hr (up to 1,000,000 #/hr upon request)
• 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.

Makeup water is sprayed into the deaerator through a stainless steel spring-loaded nozzle and into a stainless steel internal vent condenser which is located in the mixing section. This incoming water is heated instantly by direct contact with steam. Returned condensate enters the deaerator below the water level to eliminate pressure decay caused by surging returns.

The deaerated water is then pumped into the deaerating section where it is blasted through stainless steel wide angle, full-cone unrestricted nozzles. The last traces of oxygen are shaken out at the source of the purest steam. The pumped transfer rate is approximately 125% of deaerator capacity, which enables the deaerator to furnish the boiler with deaerated water from start up. Deaeration is accomplished from 0% to 100% load, and thermal stratification is eliminated.

Excess deaerated water, which is not required by the boiler, recycles into the deaerating section through the compartment overflow. This deaerated water is blended with makeup water and is constantly rescrubbed. Non-condensable vapors are expelled from the top of the deaerator through the internal vent condenser.

Consult Factory for systems over 300,000 lbs./hr.
• Weights do not include pumps or optional equipment
• Heater sections sized for 100% make-up
* Includes 48″ Stand** Includes Control Panelv – Single tank vertical design

• UNIQUE JET SPRAY scrubber design deaerator guarantees removal of all dissolved oxygen in excess of .005 cc/liter (7 ppb)
• ELECTRONIC INSTRUMENTATION FOR MODULATING DEAERATOR LEVEL control includes a HART compatible differential pressure transmitter, PID controller, and motorized control valve
• MULTIPLE DEAERATOR CONFIGURATIONS: vertical or horizontal vessels provide maximum flexibility using minimum footprint
• ONLY STAINLESS STEEL components come in contact with undeaerated water. Deaerator spray nozzle, scrubbing section and internal vent condenser are all stainless steel
• A.S.M.E. Code and National Board stamped receivers – 50 psi standard vessel options include stress relieving, non-destructive testing and full vacuum
• CUSTOM ENGINEERED PACKAGED DEAERATOR SYSTEM includes boiler feedwater pumps and quality components to insure reliable service

• The Jet Spray deaerator provides excellent performance utilizing the high velocity incoming steam to atomize makeup water and pumped returns. Stainless steel internal components provide reliable performance for many years. This superior spray-type design directs the cleanest incoming steam to scrub out the last traces of oxygen from the cleanest water
• GUARANTEED DEAERATOR PERFORMANCE .005 cc/liter per ABMA testing procedures. Standard sizes ranging from 6,900 lbs/hr to 300,000 lbs/hr
• 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

WATER FLOW- Incoming undeaerated water and pumped returns enter the deaerator through a spring-loaded stainless steel nozzle which directs the flow in conical sheets into the steam atmosphere of the direct contact vent condenser. At this point, the water temperature in the deaerator is raised to within a few degrees of steam temperature and most of the corrosive, non-condensable gases are removed. The water is directed by a stainless steel tray section into the Jet Spray atomizing valve. Here a high velocity of incoming pure steam atomizes the water into minute particles. This violent scrubbing action removes the last traces of dissolved gases. The hot, deaerated water then falls to the storage compartment for boiler use.

STEAM FLOW- Steam initially enters the deaerator through a special stainless steel Jet Spray atomizing valve. This valve is designed to fully atomize and provide complete deaeration under all load conditions. This design insures that the purest steam comes in contact with the purest water. Once this high velocity steam mechanically shakes out the last traces of non-condensable gases from the water, it flows upward into the preheated area where it meets the incoming makeup water and pumped returns. This water continually condenses the steam which preheats and releases the non-condensable gases into the internal vent condenser where they are metered harmlessly from the deaerator into the atmosphere. This action causes more steam to be drawn into the system to complete the cycle.

Consult Factory for systems over 300,000 lbs./hr.
Weights do not include pumps or optional equipment

* Includes 48″ Stand
** Includes Control Panel

1. Receiver factory mounted on stand.
2. Bronze float type make-up valve.
3. Stainless steel temperature gauge.
4. Bronze water gauge cocks with 5/8″ red line gauge glass.
5. Centrifugal boiler feed pumps.
6. Suction piping including shut-off valve.
7. Magnetic starters for each pump with enclosure.
8. Hand-Off-Auto switch in each starter enclosure.

The AFS line of feedwater systems is available in seven sizes to fit most firetube and commercial watertube boiler applications:
Sizes are 50, 100, 200, 300, 500, 750 and 1,000 gallons of storage capacity.

• The standard packaged design is shipped complete with the pumps and pump suction piping factory installed. Most components are factory
installed to make it easier to get the boiler feedwater system installed with minimum cost and effort.

Pump size matched to tank size for easy selection.
2. Centrifugal pumps provided with all models.

Centrifugal pumps are used on all low pressure and high pressure steam units. Centrifugal pumps are more efficient than turbine type pumps, which reduces electrical use, saving money on utility bills. The centrifugal pumps also require less maintenance. Turbine pumps are available upon request.

Single stage centrifugals are used on the low pressure steam systems. (Vertical is optional.) Multistage vertical centrifugal pumps are used on the high pressure steam systems.

Many feedwater systems fail prematurely due to the corrosive effects of condensate and oxygenated make-up water. If the feedwater system experiences significant levels of make-up and steam is used for feedwater preheat in the feedwater system, a standard “carbon steel” vessel may fail prematurely.

The corrosion resistant options available are:

• 304 Stainless Steel vessel
• Duratherm lining (100 to 1,000 gallon)
• Hot Dipped Galvanized vessel

The higher the level of make-up, the greater the need for a corrosion
resistant lining.

A steam preheat assembly is recommended if the blended makeup/condensate return temperature is lower than 140F. This component includes a self contained temperature control valve, check valve, and copper sparge tube to evenly distribute the steam under the water line of the feedwater system.

Our standard feedwater systems include a starter for each pump enclosed in a common Nema 1 panel and wired to the motors. Additional options include door disconnect, control circuit transformer, alarm switches, fuse protection, alternator (for on/off operation only), UL label, and Nema 1 2/4/4x panels.

The standard feedwater systems are available in 3 to 4 weeks. If you need a system now to replace a unit which has failed or for a quick turn project, we offer expedited shipment at a nominal charge. Several sizes are in stock for quick shipment.

• Solenoid Makeup Valve
• Alarm Switches (level)
• Discharge Piping
• Chemical Quill
• 3-valve Bypass
• Bolted Stand
• Lowboy Arrangement

NOTES:
1. ALL DIMENSIONS IN INCHES UNLESS OTHERWISE NOTED.
2. Y-STRAINERS SHOWN ARE OPTIONAL.
3. STANDARD STAND HEIGHTS ARE LISTED. OTHER HEIGHTS ARE AVAILABLE BY REQUEST.
4. MAKE-UP INLET (K) IS DETERMINED BY SYSTEM CAPACITY.
5. ONE, TWO, OR THREE BOILER FEED PUMPS CAN BE ACCOMMODATED INTO STAND.