ESD Safe Wall Mounted Extraction Arms for an Aerospace Manufacturing Facility in Troy, Alabama
An aerospace manufacturing operation in Troy, Alabama needed solvent and adhesive fumes captured at the bench without introducing a static discharge risk. Labs USA supplied two static dissipative extraction arms with conductive inlet hoods, wall mount bracket kits, and tube extensions sized to reach the work.
The Situation
Precision aerospace work involves a long list of small chemical operations. Surfaces are wiped with solvents before bonding. Adhesives, primers, and coatings are dispensed by hand in small quantities. Labels and appliques are applied with activators. None of these steps look dramatic, and none of them individually produce the volume of vapor that a chemistry laboratory would, but they happen many times a day, at a bench, in the operator’s breathing zone.
The operation in Troy, Alabama that this project served had exactly that profile. The chemistry was light but constant, and it happened at defined bench stations rather than inside enclosures. General room ventilation was moving air through the building, but general ventilation dilutes; it does not capture. Vapor released a few inches from an operator’s face is in the breathing zone before the room air has any effect on it at all.
There was a second requirement that ruled out most standard equipment. The bench work involved static sensitive components and flammable solvent vapors, which makes an ordinary plastic extraction arm the wrong choice. Plastic ducting moving air carries a charge. A charge that accumulates on an insulating surface eventually equalizes somewhere, and the two places you never want that to happen are next to an electronic assembly and inside a stream of solvent vapor.
The facility also had no interest in rebuilding the bench line. The stations were established, the wall behind them was available, and the practical ask was straightforward: capture the fumes at the source, do it without adding a static hazard, and do it without taking the bench out of service for a construction project.
The Solution
Labs USA specified two electrostatic discharge safe extraction arms, each four inches in diameter and ninety four inches long, supplied with a wall mount bracket kit and a conductive black ABS combination inlet hood. Each arm was also supplied with an additional forty three inch tube extension, which pushes usable reach out past the depth of the bench and lets one arm serve a wider working area than its nominal length suggests.
The important detail on this project is not the arm’s size, it is what the arm is made of. On an ESD version the tube material and the joints are conductive or static dissipative rather than insulating, and the inlet hood is a conductive polymer instead of ordinary plastic. That gives charge a continuous path to ground through the mounting bracket rather than letting it build on the surface nearest the work. In a plant that handles both static sensitive assemblies and flammable solvent vapors, that single material choice is the difference between a safety improvement and a new hazard.
The arms were configured as source capture devices rather than enclosures. The operator pulls the hood to the work, positions it a few inches from where the vapor is generated, and the arm holds that position on friction joints. Because capture happens at the release point, the airflow needed is a small fraction of what a walk-up hood of equivalent protection would move, which matters in a conditioned production space where every cubic foot exhausted has already been paid for.
No blower was included in the package. The facility connected the arms to existing exhaust capacity, which is a common and sensible arrangement when a plant already has ducted extraction available and simply needs the capture end done properly. Labs USA supplies matched fans when they are needed, and leaves them out when they are not.
Wall mounting was chosen over ceiling or bench mounting because the wall behind the stations was free, the benches were fixed, and wall brackets keep the arm out of the work surface entirely. The arm folds back against the wall when it is not in use, which keeps the bench clear for setup, inspection, and cleaning. If you are comparing configurations for your own bench line, the wall mounted extraction arm and ceiling mounted extraction arm pages walk through where each one fits.
Features
Advantage
Source capture and enclosure ventilation solve the same problem in very different ways. An enclosure surrounds the work; a capture arm goes to it. For aerospace bench operations the arm usually wins for three reasons: the operator keeps full physical access to the part, the equipment adapts to the job instead of the job adapting to the equipment, and the exhaust volume is a fraction of what an enclosure of comparable protection requires.
Choosing the ESD version is a separate decision from choosing the arm. Standard arms are the right answer in most laboratories. They are the wrong answer wherever static sensitive electronics, energetic materials, fine powders, or flammable solvent vapors are present. In those environments the conductive version costs modestly more and removes a failure mode that is very hard to engineer around later.
- Capture at the release point rather than diluting vapor across the room
- Grounded, static dissipative construction end to end, including the inlet hood
- No loss of bench access, tooling clearance, or line of sight to the work
- Far lower exhaust volume than an enclosure providing comparable protection
- Installs onto existing walls and existing benches with no line shutdown
- Repositionable as the product mix and station layout change
Labs USA specifies from the application rather than from a catalog page. That means asking what is being released, where the operator’s hands and face actually are, whether the surroundings are static or ignition sensitive, and what exhaust capacity already exists, before selecting an arm diameter, length, hood, and mounting method. See the full laboratory exhaust snorkel and extraction arm range for the configurations available.
Benefits
The measurable benefit of source capture is what does not reach the operator. Vapor removed two inches from where it forms never enters the breathing zone, never spreads across the bench, and never has to be diluted by the building’s air handling system. That is a better outcome for the person at the bench and a cheaper one for the plant.
The benefit specific to the ESD configuration is that the safety improvement does not import a new risk. It is entirely possible to reduce an inhalation hazard and simultaneously create a discharge hazard by mounting insulating plastic ducting over a static sensitive process. Specifying conductive material at the start is the only clean way to avoid that trade.
There is a quality benefit as well, and in aerospace work it is not a small one. Bonding, priming, and coating operations are sensitive to airborne contamination and to solvent vapor lingering over a prepared surface. Pulling vapor away from the work area at the moment it is released keeps the surface and the surrounding air cleaner for the next step in the process.
A grounded bench, grounded tooling, and a grounded extraction arm: the capture equipment belongs to the same static control system as everything else on the station.
Return on Investment
The return on two extraction arms is easiest to see in exhaust air. A bench mounted enclosure sized to protect the same operation moves several hundred cubic feet of conditioned air per minute whenever it is open. A pair of capture arms handles the same operations on a small fraction of that volume, and only while the work is happening. In a conditioned plant in the Alabama climate, the heating and cooling load avoided is a recurring saving that does not depend on any assumption about how the equipment is used.
The second return is the one nobody invoices for: a single electrostatic discharge event next to an aerospace assembly can scrap a part whose value dwarfs the entire ventilation package, and latent ESD damage is worse than an obvious failure because it ships. Specifying conductive equipment is cheap insurance against a defect mode that is nearly impossible to inspect for.
The third is flexibility. The arms bolt to the wall, they are repositionable, and they can be relocated when the station layout changes. Ventilation built into fixed enclosures gets abandoned when a line is rearranged. Arms move with the work.
Project Process
Application review
Labs USA reviewed what was being released at the bench, where the operator worked, and the static and flammability sensitivity of the surroundings.
Configuration
Two four inch by ninety four inch ESD arms were selected with conductive combination inlet hoods, wall mount bracket kits, and forty three inch tube extensions.
Coordination
The package was quoted without a blower so the arms could be tied into the plant’s existing ducted exhaust capacity.
Fabrication and shipment
The arms and mounting hardware shipped complete to the Troy, Alabama facility on the schedule the plant required.
Installation
Wall brackets were set behind the existing benches, arms mounted, extensions fitted, and the arms connected to exhaust.
Support
Labs USA remains available for additional stations, replacement hoods, and matched fans as the operation expands.
Serving Aerospace Manufacturers in Troy and Across Alabama
Southeast Alabama has a real aerospace and defense manufacturing base, and Troy sits inside it. Plants in this region run precision assembly, bonding, coating, and finishing operations that need proper source capture ventilation, and they generally need it added to production areas that are already running rather than designed in from scratch.
Labs USA ships laboratory and industrial ventilation equipment nationwide from Salt Lake City and supports Alabama customers directly. Extraction arms, capture hoods, matched exhaust fans, laboratory fume hoods, and laboratory casework and work surfaces can be specified together so a bench line, a quality lab, and a production area all end up with equipment that matches.
If you are adding source capture to an existing bench line anywhere in Alabama, call (801) 855-8560 and describe the operation. We will tell you what diameter, length, hood, and mounting arrangement fits, and whether the ESD version is necessary in your environment or an unnecessary expense.
Frequently Asked Questions
What makes an extraction arm ESD safe?
The tube material, joints, and inlet hood are conductive or static dissipative rather than insulating plastic, so static charge has a continuous path to ground through the mounting bracket instead of accumulating on the surface nearest the work.
When do I actually need an ESD arm instead of a standard one?
Whenever static sensitive electronics, energetic materials, fine combustible powders, or flammable solvent vapors are present at the station. In ordinary laboratory chemistry a standard arm is appropriate.
How far does a four inch by ninety four inch arm reach?
It comfortably serves a standard depth bench station from a wall bracket. On this project a forty three inch tube extension was added to each arm to widen the area one station covers.
Why is there no blower in the package?
The facility already had ducted exhaust capacity available, so only the capture end was needed. Labs USA supplies matched direct drive fans when a project has no existing exhaust.
Will source capture protect an operator as well as a fume hood?
For bench scale dispensing, wiping, and bonding operations, capture at the release point is very effective and keeps vapor out of the breathing zone. Enclosures remain the right choice for higher hazard or larger scale chemistry.
Can arms be mounted somewhere other than the wall?
Yes. Ceiling brackets, bench mounts, and portable units are all available. Wall mounting was chosen here because the wall behind the benches was free and it keeps the bench top clear.
How much exhaust air does a capture arm use?
Substantially less than an enclosure providing comparable protection, because the capture point sits inches from the source rather than across an open sash.
Can the arms be moved later?
Yes. They are bracket mounted and can be relocated when a bench line is rearranged, which is one of the main advantages over fixed enclosures.
Need Source Capture at Your Bench Line?
Labs USA specifies standard and ESD safe extraction arms, capture hoods, and matched exhaust fans for aerospace, electronics, and industrial benches nationwide.