Welding and grinding frequency, the type of particulate that is being removed, the type of filters being used, and the type of welding being performed all effect the filter replacement interval.
Because of all of these factors, the customer must monitor and document the system airflow readings for a period of time. The information collected will help determine the most appropriate time to change filters. This process will ensure that the system runs at maximum efficiency while minimizing filter replacement costs.
The easy access system of the Weld Station helps with faster filter replacement and reduced maintenance.
Where to Start
Start by making copies of the attached log sheet. This log sheet should be filled out for each Weld Station you have in your system. Make a physical check to ensure that the smoke / particulate is being removed through the intakes spark baffles. This can be done by a simple visual check during normal operation. There should be a reduced level of visible smoke when the unit is in operation. During maintenance, examine the intake spark baffle at the back of the welding booth(s). These filters should be washed when they become visibly dirty / contaminated. The differential pressure sensor does measure across intake spark baffles; however, visual inspection is required.
Replacement filter cartridges and spark baffles of all types are available from your Clean Air America sales representative.
How to Determine the Filter Change Interval
At this point, take note and document the pressure differential readings displayed on the controller. It may be easier to raise the plastic flip lid cover to access the display.
The controller will allow the pressure differential to build to 3.0 in. H 2 O (inches of water column). This means the unit will automatically pulse the next time unit is stopped. This value may be different if the options on the controller have been changed. The controller will allow the pressure differential to build to 7.0 in. H 2 O. At this point it will automatically pulse while the unit is running until the pressure drops below 7.0 in. H 2 O. This value may be different if the options on the controller have been changed.
Copyright © Clean Air America, Inc.
Weld Station User Manual, March 2011
Page 69 of 112
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