| 1. | Improper Preload - When preloading a new filter, it is important to restrict the air flow of the collector. Restriction reduces the air velocity and thus the impact and penetration of the preload dust. |
| 2. | Oil/Moisture Absorption Into The Filter Media- These contaminants can come from either the air stream to the collector, or from the compressed air supply. They can cause the following problems: |
| A) | Oil captures and holds dust. This prevents back-pause clearing of the contaminant. |
| B) | Oil/moisture will swell the media fibers thus trapping contaminants and not allowing release at backpulse. |
| C) | Oil/moisture will soften and weaken the media, possibly leading to fracture. |
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To prevent premature blinding of dust collecting filters, follow these rules:
- Restriction Of Air During Preload - Provide a blast gate, fan damper or other means of restriction.
- Oil/Moisture Control - Air Stream - The in-plant processes must be monitored and maintained to assure that the air stream to the collector is free of oil ands moisture.
- Oil/Moisture Control - Use a filter/separator in the compressed air supply. If freezing temperatures are possible, then an air dryer capable of drying the compressed air below the dew point is necessary
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