Chemical Fume Hood and Laboratory Casework for a Polymer Materials Lab: Envalior
Envalior needed fume extraction and chemical resistant casework for its performance materials laboratory in Dallas, North Carolina. Labs USA supplied a 60 inch bench mounted chemical fume hood, steel laboratory cabinetry, and acid and flammable storage sized to the room.
The Situation
Envalior makes engineering materials, and a performance materials laboratory does chemistry that looks different from a teaching lab or a clinical lab. Samples are prepared, dissolved, heated, weighed, and tested against specifications, often using solvents and acids that a general room exhaust system was never meant to handle on its own.
The requirement on this project was fume extraction plus the storage and work surfaces to go with it. Those two things are usually treated as separate purchases, and that is where lab projects go wrong. A fume hood with nowhere compliant to store the chemicals it is used with just moves the problem a few feet away, and a hood set on the wrong work surface starts failing at the countertop long before the ventilation gives any trouble.
The lab also needed the package to be specified as one scope. Envalior was coordinating this with site work, so the hood, cabinetry, work surfaces, and storage had to arrive as a matched set with a known lead time rather than as pieces from several suppliers with several schedules.
The Solution
Labs USA supplied a 60 inch bench mounted chemical fume hood as the centerpiece. It has a frameless vertical rising sash on a chain drive, galvanized steel pan construction, an open bypass, a white polyglass interior lining, a stainless steel duct collar, and a black dished epoxy resin work surface. Electrical services were pre-wired to a junction box on the roof of the hood, which keeps the electrician’s scope on site short and predictable.
Each of those details earns its place. The open bypass keeps face velocity stable as the sash is lowered, so the hood keeps working the way it was commissioned rather than only when the sash happens to be wide open. The dished epoxy resin surface resists solvents and acids and contains a spill instead of letting it run onto the floor. A chain driven sash lifts smoothly with one hand, which matters for a hood used dozens of times a day, and a frameless sash gives a clear view of the work with no bar across the operator’s line of sight.
Around the hood, Labs USA supplied powder coated inset steel laboratory cabinetry with painted steel drawer bodies, one hundred pound full extension drawer glides, and brushed stainless steel wire pulls. Storage was specified for what the lab actually handles: acid cabinets lined with eighth inch polyethylene acid resistant liner and fitted with a three quarter inch black phenolic resin shelf, and UL 1275 listed flammable cabinets with self-closing synchronized doors, fusible links, and a slam catch.
The cabinetry is independently tested to meet or exceed SEFA 8, the Scientific Equipment and Furniture Association standard for laboratory casework strength and durability. Cabinet bodies were finished in a petal white with plum coloured door and drawer faces, so the lab reads as a designed space rather than a collection of grey boxes. Freight and crating to the North Carolina site were included in the scope, and the package shipped as one coordinated release supporting Envalior’s laboratory fume hood and lab furniture requirements together.
Features
Advantage
A materials lab could handle solvent work with a ductless filtered enclosure, a general exhaust canopy, or a ducted chemical fume hood. Ductless units are attractive because they need no ductwork, but they depend entirely on filter media being right for the chemistry and being replaced on schedule, and they are a poor fit where the mix of chemicals changes with the project. A canopy captures heat and rising vapour but does not contain anything, so it protects the room and not the operator.
A ducted bench mounted hood with an open bypass and a properly specified work surface is the straightforward answer where a lab handles a changing mix of solvents and acids. It contains, it exhausts, and its performance does not depend on someone remembering a filter interval.
The second half of the advantage is buying the hood and the casework together. Work surface material, cabinet chemical resistance, storage classification, and dimensions all have to agree with each other. When those come from one specification, the lab gets a hood that sits at the right height on a surface that suits the chemistry, with compliant storage within arm’s reach. Labs USA also specifies exhaust snorkels for source capture at open benches where a full hood is more than the task requires.
Benefits
- Solvent and acid work is contained and exhausted rather than diluted into the room
- Face velocity holds up as the sash is lowered, so the hood performs in normal daily use
- Corrosives and flammables have properly classified storage next to where they are used
- Work surfaces resist the chemistry they meet and contain spills instead of spreading them
- Casework is independently tested to SEFA 8, so durability is a documented standard
- Hood, casework, surfaces, and storage arrived as one coordinated package with freight included
- Pre-wired electrical services shortened the electrical scope during installation
Steel casework with full extension drawers and brushed stainless pulls, finished in petal white with plum door and drawer faces, keeping the lab’s tools and chemicals organised within reach of the hood.
Return on Investment
The clearest financial case for specifying the hood and the casework together is avoided rework. The expensive mistakes in lab fit-outs are almost always coordination mistakes: a countertop that does not match the hood height, a hood that arrives before there is compliant storage for what it will be used with, or storage bought to the wrong classification and replaced a year later. One specification removes those.
The second is durability. Steel casework tested to SEFA 8, with one hundred pound full extension glides and acid resistant liners where corrosives are stored, is bought once. Consumer grade cabinetry in a solvent environment degrades, and the replacement happens in a working lab, which costs downtime on top of material.
The third is operating cost. A hood with an open bypass exhausts a controlled volume rather than whatever the sash position dictates, which keeps make-up air conditioning predictable. Pre-wired services and included freight and crating also cut the two line items that most often overrun on lab projects: site electrical labour and delivery.
Finally, containment protects the sample. A test result that has to be repeated because a preparation was contaminated costs the lab far more than the equipment difference.
Project Process
Define the Chemistry
Confirm which solvents, acids, and processes the lab runs and at what scale.
Specify the Hood
Size the hood to the bench run and select sash, bypass, lining, and work surface.
Specify the Casework
Match cabinetry, work surfaces, and acid and flammable storage to the chemistry.
Coordinate the Scope
Issue hood, casework, storage, freight, and crating as one quoted package.
Deliver and Support
Ship to site on a known lead time and support the installing trades.
Serving Laboratories Across Dallas, Gastonia, and the Charlotte Region
Envalior’s laboratory is in Dallas, North Carolina, in Gaston County just west of Charlotte on the Gastonia technology corridor. Labs USA supplies fume hoods, laboratory casework, and ventilation to industrial, polymer, textile, and testing laboratories across the Charlotte region, including Gastonia, Belmont, Shelby, Lincolnton, Kings Mountain, Mount Holly, and Charlotte itself, and works nationwide on projects like this one.
Gaston County has a long manufacturing history in polymers, fibres, and textiles, and the quality control and development labs attached to those plants tend to share the same need: real chemical fume extraction and casework that survives the chemistry, specified together and delivered on a schedule that fits around production.
Frequently Asked Questions
What size fume hood does a materials testing lab need?
It depends on the bench run available and what is done inside the hood. A 60 inch bench mounted hood suits a single operator doing sample preparation, digestion, and solvent work, and fits a standard bench line without dominating the room.
What does an open bypass do on a fume hood?
It maintains a more stable face velocity as the sash is lowered. Without a bypass, closing the sash increases velocity through the remaining opening, which can disturb the work and pull the hood away from the conditions it was commissioned at.
Why an epoxy resin work surface instead of laminate or stainless?
Epoxy resin resists a broad range of solvents and acids and does not corrode or delaminate. A dished surface also contains a spill inside the hood rather than letting it run over the front edge. Laminate is not suitable for this chemistry.
What makes a cabinet a proper acid storage cabinet?
A chemical resistant liner and shelving that will not be attacked by the contents. On this project the acid cabinets were lined with eighth inch polyethylene and fitted with a phenolic resin shelf, so spills stay contained and the cabinet body is protected.
What does UL 1275 mean for a flammable storage cabinet?
UL 1275 is the safety standard for flammable liquid storage cabinets. Listed cabinets include features such as self-closing synchronised doors with fusible links, so the cabinet closes itself in a fire even if it was left open.
What is SEFA 8?
SEFA 8 is the Scientific Equipment and Furniture Association standard for laboratory casework performance, covering structural strength, finish durability, and chemical resistance. Casework independently tested to SEFA 8 has documented performance rather than a marketing claim.
Should a lab buy its fume hood and casework together?
Usually yes. Hood height, work surface material, cabinet chemical resistance, and storage classification all have to agree. Specifying them as one scope avoids the coordination errors that cause the most expensive rework in lab fit-outs.
How long does laboratory casework and hood delivery take?
Lead times vary with configuration and finish, and on projects of this type are typically quoted in weeks from approved submittals. Labs USA confirms a lead time as part of the quote so it can be coordinated with site work.
Planning a Laboratory Fume Hood and Casework Package?
Labs USA specifies chemical fume hoods, steel laboratory casework, chemical resistant work surfaces, and acid and flammable storage as one coordinated scope, from a single hood to a complete lab.