Cleaver-Brooks equipment is designed, engineered, and built to provide long life and excellent service on the job.
Good operating practices and conscientious maintenance and care will obtain efficiency and economy from their operation and contribute to long years of performance.
A well planned maintenance program avoids unnecessary down time or costly repairs, promotes safety, and aids boiler code and local inspectors.
An inspection schedule with a listing of procedures should be established.
It is recommended that a boiler room log, or record, be maintained.
Recording of daily, weekly, monthly and yearly maintenance activities provides a valuable guide and aids in obtaining economies and length of service from CleaverBrooks equipment.
Even though the deaerator has electrical and mechanical devices that make it operate automatically, these devices require systematic and periodic maintenance.
Only trained and authorized personnel should be permitted to operate, adjust or repair the boiler and its related equipment.
Good housekeeping helps maintain a professional appearing boiler room
The boiler room should be kept free of all material and equipment not necessary to the operation of the boiler or heating system.
Alertness in recognizing unusual noises, improper gauge reading, leaks, etc., can make the operator aware of a developing malfunction, permitting prompt corrective action that may prevent extensive repairs or unexpected down time
Any steam, water or fuel leaks should be repaired as soon as they are noticed. These are wasteful as well as hazardous.
Include in the program preventive maintenance measures such as regularly checking the tightness of connections, locknuts, setscrews, packing glands, etc.
Insurance regulations or local laws may require a periodic inspection of the pressure vessel by an authorized inspector.
Inspections of this type are usually, though not necessarily, scheduled for periods of normal boiler down time such as an off season.
This major inspection can often be used to accomplish maintenance, replacements, or repairs that cannot easily be done at other times.
This also serves as a good basis for establishing a schedule for annual, monthly, or other periodic maintenance programs.
While this inspection pertains primarily to the waterside and fireside surfaces of the boiler, it provides an excellent opportunity for detailed inspection and checking of all components of the system including: Comprehensive cleaning, spot painting or re-painting, and the replacement of expendable items, should be planned for and taken care of during this time.
Any major repairs or replacements that may be required should also, if possible, be coordinated with this period of boiler shutdown.
Replacement spare parts, if not on hand, should be ordered sufficiently prior to shutdown.
Water and steam passing through the deaerator are normally of high purity.
The necessity for cleaning should be infrequent.
The internal parts of the spray nozzle, the steam atomizing valve, and the water collector are constructed of stainless steel and normally require no maintenance or cleaning.
Nevertheless, the interior of the tank and the spray assembly should be inspected at least annually for any evidence of corrosion, scaling or other damage.
In the event there is an accumulation of sediment, sand, gravel, etc. in the bottom of the tank, it should be removed, analyzed, and an effort made to eliminate the source.
Should scale be present, the method of cleaning, either mechanical or chemical, will be governed by the composition of the scale and its location.
If cleaning is required, it is suggested that the cleaning problem be referred to a company that is versed in this type of cleaning.
They will be able to determine the composition of the scale and will select the proper chemicals to be employed in the cleaning process.
Periodic checks for water softness should be maintained.
If hardness exceeds three grains per gallon, a water softener should be used to prevent build up of mineral deposits on the internal parts of the deaerator.
The water spray nozzle is of the self-cleaning type.
Clogging or wearing seldom occurs, however, it is a possibility that should be checked in the event problems are encountered.
This is a spring-loaded valve and it is factory pre-set.
Should disassembly or adjustment become necessary, tighten the spring with the spray disc closed, compressing it 3/16".
Be sure that the jam nut locks tightly against the adjusting nut.
Spring compression for the steam atomizingvalve (on deaerators so equipped) is factory set and does not nor mally require alter ation.
If possible, this dimension should be rechecked when the deaerator is installed, and again prior to operation since the adjusting nuts may have vibrated loose during shipment or installation.
It should be rechec ked dur ing an inter nal inspection or if an y problem is encountered.
6" diameter valve 6" ± 1/8"
8" diameter valve 7-5/8" ± 1/8"
The lock nut on the top end of the valve rod should fit tightly against the steam duct so the valve seat is held in the proper position
Some models are equipped with a counterbalanced, rather than a spr ing-loaded steam atomizing valve. (See Figure 1-7).
This type of valve should be per iodically inspected for any evidence of scale b uild up that might pre vent tight closing or freedom of mo vement.
The counter weight is located 28" from the fulcrum and normally requires no adjustment.
The spray assembly for the Model SM-7 Deaerator is constr ucted in accordance with Figure 1-9.
Access to the adjusting nuts on the springs is through a plug on the water valve and a flange on the steam valve.
The tension setting of the steam valve spring should be sufficient to just close the valve against a 20 lb weight.
The compression adjustment of the water valve spring should permit it to just close against a 1 pound weight.
Float-operated controls should be blown down or drained routinely to assure against build up of sediment that may interfere with their function.
It is suggested that the heads be removed for visual inspection during the annual boiler inspection
At the same time, remove the pipe plugs from thetees or crosses to verify that the cross connecting piping is clean and free of obstructions.
Controls must be mounted in a plumb position for proper performance
Determine that piping is vertically aligned after shipment and installation, and throughout life of equipment.
The water gauge glass should be kept clean.
Check while cool for etching thinning or damage.
If any deterioration is found, replace glass immediately to avoid the possibility of breakage in service.
The glass should be replaced periodically as part of the maintenance program.
Always use new gaskets when replacing a glass.
Do not over tighten water gauge glass fittings
Check try-cocks and gauge cocks for freedom of operation and clean as required.
Proper alignment of gauge glass cocks is essential to prevent mechanical strain on the glass.
Check and clean all drain valves
Strainers in all lines should be cleaned at regular intervals determined by conditions and usage
Refer to the Manufacturer’s literature for service recommendations on the particular components.
