The Challenge

Your air pollution control system represents a significant investment in not only initial capital but also ongoing maintenance and operation. Routine inspections performed by your staff combined with thorough maintenance plans provided by Anguil Environmental Service Technicians will ensure you get the most from your investment over the entire life of the system. Anguil has almost four decades of experience servicing a full range of oxidizer technologies, regardless of manufacturer, make or model. Following the recommendations made below will help keep your system operating both efficiently and effectively, reducing costly repairs and avoiding downtime.

The Solution


It is our goal here at Anguil to provide owners of our equipment the necessary checklists and training to comfortably perform the routine inspections with their own personnel. In the event you own another manufacturer’s equipment the checklist below may vary slightly.

Inspections include a combination of equipment checks on the “high use” items and data recording to build a history of unit performance. When performing equipment checks, operators should refer to manufacturer’s O&M Manuals for detailed procedures. For the data-gathering items, refer to historical data and note any significant changes from typical values.


  1. Examine air inlet filters for dirt and obstruction, clean or replace as necessary.
  2. Check to ensure all fan/motor guards are in place and properly secured.
  3. Prior to operating the system, ensure that all oxidizer doors and access panels are closed and latched.
  4. Check the fan(s) mounting bolts to ensure they have remained tight.
  5. Perform a visual inspection of the oxidizer for any loose hardware or damper linkage.
  6. Visually inspect the oxidizer surface looking for any new “hot-spots” which may be identified by burnt paint and other signs of overheating found on the oxidizer shell or valve housing.
  7. During the oxidizer’s normal operation, check for fan vibration, abnormal sounds or increased noise levels.
  8. Visually inspect and listen for unusual sounds during valve operation. Valves should shift smooth and evenly in both directions.
  9. Inspect the oxidizer fuel train for leaks or loose hardware.
  10. Check all temperature device read-outs to confirm temperature operation is within normal ranges.
  11. View pressure device read-outs to confirm operation is within normal range.
  12. Verify temperature chart recording device is “On” and recording data.


  1. Check the burner linkage and external burner components for wear or signs of loosening that could cause gradual slipping and adjustment issues with gas and air settings.
  2. Check fan drive belts for correct alignment, alignment and wear.  The belts should have enough tension to allow only one-half-inch movement when pushed or pulled, up or down by hand.  A quick check for alignment can be done by testing the tension on the inner and outer belts.  The tension should be equal.
  3. Remove all pressure switch sensing lines, or open drain valves if available, to ensure they are clear and dry.
  4. Process air and exhaust fan/motor bearings should be greased, per manufacturer’s recommendation. Rotate the shaft slowly by hand while applying the grease. Avoid over-greasing as it can damage the bearing seals.
  5. Drains or weep holes on all fan motors should be checked for debris and cleaned as necessary.
  6. Verify oil level of compressed air lubricator, add as necessary.
  7. Verify burner flame visually at burner or system Peep-Sight for color and intensity.  The flame should typically be “Blue” with “Orange/Yellow” tips.  The flame strength should not be “Lazy”, you should verify intensity at several different firing rates.


  1. The interior of the oxidizer should be inspected. While inside, inspect the insulation for signs of deterioration, damage or gaps. Use extreme caution when entering or exiting the oxidizer to avoid damaging the door or the door threshold insulation (if applicable).  Internal entry to be made by qualified personnel per site safety requirements.
  2. Clean the inner lens of the burner view port with a soft, dry cloth.
  3. Check the ceramic media for buildup of particulate or residue and visible damage.
  4. Before closing access doors, inspect the gaskets replacing or repairing as necessary to maintain a leak free seal.
  5. Visual inspection (only) of poppet valve shafts, seats, and disks.  Caution: This should be performed by trained / authorized personnel only, after adhering to all lock-out / tag-out safety precautions. Note:The flow control valves may shift without warning if the mechanical safety pins are not installed.
  6. Remove the UV scanner and clean the view lens with a lint free cloth.
  7. Replace the spark igniter.
  8. Inspect the exterior of the burner for damage or areas showing excessive heat.
  9. Inspect all fan flex joints and replace as necessary
  10. The T-dampers and linkage (if applicable) should be inspected for proper operation and the linkage checked for tightness and lubrication at appropriate points.
  11. Verify burner flame visually at burner or system Peep-Sight for color and intensity.  The flame should typically be “Blue” with “Orange/Yellow” tips.  The flame strength should not be “Lazy”, you should verify intensity at several different firing rates.
  12. Review past alarms for identification of areas requiring specific attention to eliminate possible future alarms.


The Anguil Preventive Maintenance Evaluation (PME) is a two to three day thorough evaluation of your system performed by a qualified Anguil Field Service Engineer. Typically, PMEs are scheduled on an annual or semi-annual basis. It does require the system be cooled down and not running for one day to complete the internal inspection. On the second day of a PME the availability of process airflow is recommended in order for the system to be inspected under normal operating conditions.

The inspection is based upon a comprehensive checklist followed up with a written formal report for your records. The formal reports are an important component of a proper maintenance / record-keeping program and are often very helpful when working with local regulatory agencies. In some cases, record keeping and regular maintenance are required as a component of an air permit. The checklist is broken down into the following four areas of your system:

  1. Mechanical: An external and internal inspection of the oxidizers mechanical components will be performed. This includes items such as: ductwork, valves, linkage, heat exchanger, reactor, fan, motor assembly, burners, catalyst, stack & observation ports.
  2. Electrical: The electrical components will be inspected and electrically tested to insure that they are functioning properly. This includes: switches, lights, relays, timers, controllers, recorders, motors, starters, actuators, disconnects, and wiring. Additionally, the system’s “Safety Circuit” will be tested for proper operation and a new spark igniter(s) installed.
  3. Process Control Loops: The temperature and pressure control loops will be inspected and tested to verify correct operation and sequence. This entails a visual inspection and adjustment of the air/fuel mixture ratio of the burner, if necessary. Also, an operational review of various controllers, actuators, thermocouples, pressure switches and variable speed drives will be performed. We will also evaluate the system (or catalyst) ready circuit, the inlet and atmospheric bypass damper circuits, the warning alarm circuits, and the shutdown alarm circuits.
  4. Oxidation Efficiency Test: If requested – an optional oxidation efficiency test can be performed by using portable detector units or collecting 1-Hour process inlet / outlet samples for laboratory analysis. This service keeps you alert of any potential problems related to your system’s Destruction Rate Efficiency (DRE) and is ideal as a pre-test to help eliminate “surprises” during expensive formal compliance testing.

Upon completion of a PME you will receive a formal evaluation report detailing the current condition of your oxidizer as well as our recommendations for improving performance, efficiency, reliability and safety.


Repeat Training Sessions: Your maintenance team may require additional training sessions as a refresher or due to employee turnover. Anguil will travel to your site and perform follow-up training sessions, often coupled with any of the inspection visits listed above.

Catalyst Maintenance: If your system includes catalyst – Anguil can help you remain in compliance and build a catalyst performance history with regular testing of your catalyst. Regular evaluation is key to maintaining catalyst performance. A standard laboratory activity test should be performed yearly, with additional follow-up testing as necessary. A formal evaluation report will be provided. Additionally, Anguil can provide other catalyst services such as catalyst rejuvenation, catalyst replacement, and also a “catalyst buy-back” program for spent catalyst.

The Result

For further information please contact the Anguil Service Department, we offer all of the services listed and more on any make or model oxidizer system! Programs can be purchased individually or grouped into a custom designed service plan.