If you're considering installing an industrial fume extraction system at your facility, you should first understand what your needs are. There are many types of systems, including Class W2 and Class W3 fume extractors. Whether you're a small business owner or you manage a large corporation, fume extraction can help you meet the regulations set forth by your employer.
What are Class W3 Fume Extractors?
For welding, the filtration efficiency of a class W3 filter should be greater than 99 per cent. It should also be made of high-alloy steel, with a minimum content of chromium and nickel. Some units even come with a spark arrestor and spark trap, which separates larger particulates from the first layer of non-woven filtration. However, this level of filtration is not enough for some types of welding and requires special filters.
Most manufacturers of fume extractors aim for a Class W3 certificate, which is a standard awarded to units that meet high requirements for emissions. The certificate is compulsory in Germany, and it is regarded as a quality mark internationally. Those who want to protect workers from harmful fumes should purchase a W3-certified unit.
What is Portable High Vacuum (PHV) System?
PHV units are portable, high-vacuum units. Their size and flexibility allow them to be used in places where larger, stationary units are impractical. The PHV removes grinding dust and welding fumes close to the source of the emissions. They can be wall-mounted or mounted on wheels. PHV units can also be equipped with self-cleaning filters. PHV units have many advantages.
Portable High Vacuum (PHV) industrial fume extraction systems are great for small fabrication shops, schools, and maintenance facilities. These units are especially effective in confined spaces. For example, a portable fume extractor can be used in a welding room where a stationary unit will be inconvenient. Alternatively, a portable unit can be mounted on a wall and used as a mobile fume extraction unit on wheels.
What is the use of Metal Core Wire in Industrial Fume Extraction Systems?
There are many benefits to using metal core wire in industrial fume extraction systems. Cored wires are generally used in welding applications, as they produce clean smoke. However, without extraction, toxic particles can escape into the surrounding air. Cored wires are available in various sizes. To ensure long-lasting fume extraction, they should be used with a welding fume filter system.
The main difference between self-shielded and metal-cored wires is their strength. The latter is stronger than solid wire but has a more compact design. The former also doesn't require an external gas tank. In general, however, it is a better choice for industrial fume extraction systems. A metal-cored wire is more effective in capturing fumes and reducing emissions, but it may not be as versatile.
What are Class W2 Fume Extraction Systems?
Industrial fume extraction systems, such as Class W2s, have several important components. The extraction fan, for example, must be the right size and type for the job. The fan powers the extraction system by transferring air from the contamination area to the hood's ducting. Extracted air may need to be filtered before it is released into the atmosphere. The most common type of fan is a centrifugal fan, which can produce high air flows against considerable resistance.
A single-gun unit is more efficient than a dual-gun unit, which means less maintenance and filter changes. Single-gun units, on the other hand, are smaller and can rest near a feeder with a long flex hose. These systems can accommodate multiple weld stations simultaneously. Some multi-gun units have a single filter that can serve many weld stations. Another benefit of multi-gun units is that they are easier to maintain than a single-gun unit.
The Bottom Line
Fume extraction systems are required in welding workshops, metal industries, furnaces, and any other facility engaged in the discharge of dangerous and poisonous gases into the environment, since they capture the harmful particles and prevent their release, therefore safeguarding the health of people, machinery, and ecosystems.
