Baghouse Filter Styles

Clean Air Matrix

RoboVent engineers are experts in every category of air filtration and ventilation. The four categories below represent the major options for treating your contaminated air. RoboVent has designed solutions for each of these categories and has manufactured air filtration systems of unrivaled quality.

For more information about these categories, see Indoor Air Quality 101.


Large blowers and air filtration equipment draw contaminated air from the plant (typically at the ceiling level), filter it and return it to the plant. This is a proven solution in plants welding large parts with overhead cranes. It reduces the haze in the air, resulting in a cleaner working environment, with no negative pressure or heat loss.


Air in the immediate area of the welding activity is captured in a hood system, then filtered and returned to the plant. This is the best solution whenever possible. It allows for a more flexible system and removes the smoke directly from the operator's breathing zone. There are many types of source capture, including overhead hoods, crossflow hoods, fume arms and fume guns, some of which work better than others.


Large exhaust fans draw contaminated air from the plant and exhaust it directly into the environment, typically through the roof or walls. This is a traditional method and often results in negative air pressure. Also, it is very difficult to climate-control your plant and the system may not work well in the winter.

Air in the immediate area of the welding activity is captured in a hood, sent through ductwork, and exhausted directly into the environment. This is a lower capital cost alternative to filtration, but tends to result in high operating costs and large, unsightly ducting systems that work less efficiently with modifications. It also results in negative pressure problems.

Baghouse filters are also known as dry fabric filters and are used to remove dust from the air by capturing particles suspended in the air. The air is directed using either vacuum suction or pressure into a series of ducts, which run horizontally and vertically from pick-up points at single and multiple plant process and nuisance dusting areas. The dust-filled air is then sucked into a main gathering duct trunk line terminating at the air inlet of a baghouse fabric filter.

Cleaning the particles off of the filter is called regenerating the filter bags’ permeability, which removes enough compacted dust cake to allow air to flow again at a low static loss across the filter media. The system depends on a fan or blower to either push or suck the air across the filter bags’ media. This means the filter bags media has a dirty side and a clean side. The dirty side intercepts, filters, and compacts the dirty air stream gases, while the clean side has contact with clean air stream gas as it passes through the media.

A baghouse filter collects dust, gas and air particulates that are released during manufacturing processes. Even when the particle size is very small, baghouses have a particulate collection efficiency of 99% or better.

RoboVent provides baghouse filters for every application from pulse jet to shaker and envelope styles as well as multi-pocket bags. We supply filters for virtually every manufacture’s piece of equipment.

Baghouse dust collectors work well in:

  • Environments with airflows are over 1,000 CFM
  • Collecting more than a 55 gallon drum full of dust per day is needed
  • High-temperature applications for over 375 degrees


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