VACUUM PACKED
Here, The Preparation Group looks at how to pick the right vacuum for a situation, whether you’re after dust, liquids of hazardous materials.
When selecting a vacuum, it’s important to look for robust, durable, steel models that feature high filtration standards and high airflow. The chosen dust extraction must also match the operation that it is to be used for.
To safely contain dust in dust- sensitive environments or in dealing with hazardous airborne particles, The Preparation Group offers three vacuum models and a pre-separator that feature Longopac Safe Bagging Systems, eliminating the need to empty a ‘bin’ as found on conventional dust extraction units.
Instead, debris is collected into a continuous feeding bag which is then twisted and sealed by the operator into manageable bags for disposal. There is a two-motor 202DSLP vacuum, three-motor M450LP vacuum as well as a 202DS Atex model, which is Category Zone 22 rated for use in food, pharmaceutical and petrochemical environments.
The Longopac Pre-separator connects to another industrial vacuum to yield even greater suction and dust containment properties. This unit is particularly popular with specialist asbestos contractors to avoid handling of material during the removal processes. With a Pre- separator, the system can be used for long range projects, i.e. at high level multi-storey buildings, with the preparation equipment and Pre- separator on the working floor and the industrial vacuum at ground level, up to 150 metres away. This eradicates the handling of any contaminated materials and, if planned and executed correctly, ensures that no hazardous materials will enter the atmosphere.
SELECTING A FILTER When removing airborne particles, it is important to select the correct vacuum filter. There are three main types; L, M and H (low, medium and high). Medium Class Filters are general purpose suitable for standard operations. A vacuum must be fitted
42 | VACUUMS & SWEEPERS
CASE STUDY:
with an L or M type filter in order to correctly function, but can also be fitted with an additional H grade filter for collecting very fine, asbestos- containing particle dust.
A vacuum fitted with an H filter is by definition an H-type Vacuum and should have an ‘H’ sticker on it. To double check that one is fitted, take the head off the vacuum to confirm that there are two filters inside, one will be an H filter.
DRY/WET VS WET/DRY When there is a need to vacuum both dry and wet materials, there are dual purpose dry/wet industrial models on the market such as the M450 that effectively remove both, without the need to change the filter system. The dry/wet vacuum’s filter is specially designed yet is equally effective at dealing with slurry. Wet/dry vacuums are primarily designed to deal with liquids but can be used on dust, so they don’t share the same high levels of dust particle containment and can clog.
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ASBESTOS The Preparation Group’s contracting division, PPC, were contracted to remove floor adhesive containing traces of asbestos from a block of council flats in Huddersfield, which were due for demolition.
The building comprised of 10 floors and equipment had to be manually lifted to each level as the lift had been disabled. The company’s 250 Grinder fitted with a PCD (Polycrystalline Diamond) Plate was used, with 9” hand grinders fitted with PCD discs employed to complete the edges. Debris and fine dust particles were collected safely by an M450LP Longopac industrial vacuum fitted with an ‘H’ grade filter, and the contaminated material was contained in special asbestos bags.
The total area of 1,413m2 took six
days to complete. The contaminated material represented a small percentage of the overall structure so by disposing of this element separately, it meant that the whole building was not classed as contaminated waste, thus reducing environmental impact and costs.
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