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.

Capture robotic welding fumes right at the source with RoboVent FlexTrac™.

Now, you can control robotic weld fumes at the source, with high-efficiency robotic tip extraction.

The RoboVent FlexTrac™ is the perfect solution for robotic welding applications where hoods are not practical. The FlexTrac collects the majority of weld fumes as they are created, reducing the need for large ventilation or ambient filtration systems in environments where robotic welding cannot be enclosed.

RoboVent FlexTrac™ captures 80-95% of weld fumes as they are created.*

* Depending on application.

RoboVent FlexTrac Application

The Benefits of Robotic Tip Extraction

Robotic welders produce a high volume of toxic fumes due to arc-on times that far exceed manual welding. For this reason, robotic welding cells are traditionally enclosed under a hood that is ducted to a high–powered dust collector. When applications cannot be hooded, fumes build up on the ambient air, creating health concerns for employees and putting facilities out of regulatory compliance.

Many companies have met these challenges with powerful ventilation systems or ambient filtration. While these systems work, cleaning the air for the entire facility requires movement of large volumes of air—meaning a more powerful, and more expensive, dust collection system. Exhaust ventilation systems also create energy concerns as heated or cooled air is vented to the outside and replaced with outdoor-temperature air.

FlexTrac is a more efficient way to collect weld fumes for MIG robotic welding applications. Source capture requires much less energy, since you are moving a much smaller volume of air. FlexTrac maximizes capture efficiency by positioning the extraction tip right on the robot arm. That means a smaller, more energy efficient high-vacuum dust collector can be used to capture the fumes. If ambient filtration is still needed, a much smaller system will generally suffice to clean up any remaining fumes.

FlexTrac is perfect for robotic welding of tractor-trailers, agricultural equipment, large infrastructure components and other large weldments that are difficult or impossible to put under a hood. It also works well in environments where cranes and other overhead equipment make hooded enclosures impractical.

FlexTrac How it Works

How it Works

The RoboVent FlexTrac can be attached to almost any robotic MIG welder. The extraction tip is custom sized and fitted to the robot for optimal fume capture and to ensure that the extraction tip does not interfere with the robot’s movement and weld seam quality.

AThe extraction tip is positioned right behind the weld torch on the robot arm. Depending on the application, the extractor tip captures 80-95% of weld fumes as they are created.

BA custom bracket holds the tip in the correct position.

CA lightweight, flexible hose is connected to the extraction tip. The hose is attached to and moves with the robot arm.

DThe FlexTrac is attached to a high-vacuum (hi-vac) dust collector such as the RoboVent FlexPro™ or the RoboVent ProCube™.

FlexTrac Clean Facility

A Cleaner, Safer Facility

FlexTrac gives manufacturers a new option to keep hard-to-manage weld fumes under control for high production robotic applications. As today’s air quality regulations become stricter, the filtration provided by FlexTrac can ensure that your facility remains compliant. Citations from the Occupational Safety and Health Administration (OSHA) can lead to major fines and other legal hassles.

Cleaner facilities are safer ones, as well. Robotic tip extraction offers more protection for workers, since most fumes are collected at the source before they escape into the ambient facility air. The FlexTrac keeps toxic weld fumes out of the air and prevents them from drifting throughout the facility, significantly reducing the need for ambient air quality control.

Related Products

FlexPro™ Hi-Vac Series

A plug-and-work smoke-collection system that collects fumes at the source. This powerful air filtration system is perfect for manual and robotic welding applications.


RoboVent ProCube puts high-vacuum filtration power into a small, portable package that goes wherever you need it.