An industrial filter’s primary function is to separate and collect impurities from air or gas streams. However, numerous types, designs, and features are available depending on the particular application circumstances. Choosing the right industrial filter can be difficult if you are unaware of the elements that affect or enhance its effectiveness. In addition to pertinent design norms and standards, there are application- and process-specific considerations when choosing an industrial filter. Below are the most important aspects to take into account when selecting an industrial air or gas filter:
Air/gas flow rate
The size and effectiveness of a filter are directly influenced by the gas or air stream’s flow rate. The process flow rate directly affects the size of a filter case and the surface area of the internal filter element. The flow also affects the filter’s effectiveness and capacity for holding dust.
This is essential information for sizing an industrial air or gas filter because studies have shown that when the flow rate is too high, the dust-holding capacity and efficiency will deteriorate.
Indoors vs. Outdoors installation
The structure and longevity of the filter will depend on where the process equipment (vacuum pump, blower, or compressor) is located. For instance, a 316L stainless steel structure is perfect for mounting filters outside in a severe marine environment.
Experts from the leading air filter manufacturer advise that suitable shielding is required if the filter is exposed to weather conditions like rain or snow to prevent influx into the filter and potential equipment bypass. The ambient air quality is particularly crucial because a complicated issue necessitates more frequent service visits. Filters installed in challenging ambient situations like cement manufacture and mining equipment need extra protection.
Type and characteristics of the contaminant
Air and gas filter designs change depending on the contaminant type (particles, liquid, or vapor). Analyzing the process and the operating circumstances (pressure/vacuum, temperature, etc.) is crucial. Together, these will determine the separation stages, flow pattern, and filter housing design.
For instance, although a heavy liquid problem could call for numerous separation steps (baffle, demister, and final filter element), superficial dust contamination might only need a polyester filter element. Considerations include any information on the concentration, physical characteristics, and particle size (micron).
Temperature
Process temperature will affect the contamination’s physical state. For instance, liquids can evaporate into vapors and bypass some filters. Extreme temperatures will also impact the materials used to build filters.
This is crucial for the media, adhesives, and elastomers that comprise the filter element. Reduced filter life and efficiency may happen if operating circumstances exceed the anticipated temperature range.
Continuous or temporary duty
Filters experience more stress as continuous operations become the standard for industrial process machinery. Although the steady flow is predictable, contamination (particles, liquids) is a constant challenge.
A bigger capacity filter will be required to accomplish the necessary service interval and pressure reduction under harsher ambient or process conditions. The size is crucial to guarantee that the filter works effectively.
Conclusion
It’s crucial to consider all application aspects and system requirements when choosing filters to safeguard industrial equipment.
