“Earth to earth, ashes to ashes, dust to dust”, quicker with the wrong equipmentPublished 3/7 at 13:56
In this annual feature about industrial dust extractors and air cleaners, PDi takes a look at the latest products that can comply with new and stricter asbestos and silica regulations.
Jan Hermansson reports.
Dust resulting from different kinds of construction debris is becoming a bigger and bigger issue all around the world. In Scandinavia, and particularly Sweden, the regulations have been very tough for a long time, with a similar situation in Germany. Now other countries in Europe are following the same example. Last year the USA, through OSHA, joined in with new strong silica rules, with similar developments in other countries such as Australia, New Zealand, Japan, etc. However, there are a number of countries around the world where we still have very little information about how these issues are handled, with this information concerning the risks being paramount as hazardous particles in construction dust are a major contributing factor to loss of life.
Manufacturers taking their responsibility seriously
Swedish regulations have for a long time ensured contractors comply with regulations, being strenuously enforced. Where necessary, contractors who do not follow the rules concerning protection and right type of equipment when working with hazardous waste are pursued and brought to task. Today it is very rare to find a contractor using incorrect methods and equipment, but it still happens. Recently it was reported that a Swedish contractor hired labour from countries that do not apply the same strict rules, with the workers acting as if they were in their home countries where the same strict regulations do not apply. The situation arose with the removal of an asbestos cement roof, or eternity as it is called in Sweden, at a kindergarten in the south of Sweden. A father of two of the children at the kindergarten reacted when he discovered that the workers did not use any kinds of protective cloths or masks, and the broken eternity tiles were simply dropped to the ground where the children were playing around the resulting piles of debris. It did not take long for the work to be stopped, the area sealed and the contractor given a heavy fine.
If children playing outdoors in the vicinity of hazardous dust particles are at high risk of developing life threatening injuries later in life, what risks are construction workers exposed to on a daily basis? This means that maximum body protection clothing as well as the right type of dust extraction and air cleaning equipment is required as a priority. Luckily most manufacturers of dust extraction and air cleaning equipment are taking responsibility for health and safety, and have done so for a long time. Every year in PDi Magazine we publish our special feature on new equipment; since last year a number of new and better devises has been developed and launched, all ideal for dealing with hazardous emissions.
News from Blastrac
Dust from concrete floor grinding and polishing might not that often contain asbestos, but it has a very fine dust that is very dangerous to breathe in. The manufacturer Blastrac has recently launched four new 1phase dust extractors with the smallest being the BDC-1133, this being an M/H class dust collector that deals with hazardous materials (TRGS519 certified for safe asbestos removal). It has a permanent reverse air pulse filter cleaning system, delivering high suction performance with sealed airflow that gives increased productivity. Special features for this product include flow sensor warning and storage solutions. The H class machines have a dual filter solution, which delivers 3 stage filtration, and are equipped with a power outlet with automatic ‘start and stop’ specifically developed for electric power tools.
The new BDC-122M dust collector is M class certified with a new generation of M class filter, a manual filter hand shaker on top, and is equipped with two motors and an Ø50mm inlet. It is a quite small, easy to transport dust extractor, but a very powerful dust collector, also being equipped with Longopac bagging system for a safe working environment. The BDC-122 HC dust collector is an H class machine, certified to EN 60335-2-69 Annex AA. Equipped with a new generation of M class filter and secondary H14 HEPA filter, this machine also has a manual hand shaker on top, two motors and an Ø50mm inlet. It is equipped with a Longopac bagging system for a safe working environment, and is ideal when dealing with hazardous materials such as asbestos. Similarly the BDC-133MUD dust collector is M class certified and equipped with a new generation of M class filter, being equipped with a manual hand shaker on its side delivering very high suction power from three motors and an Ø70mm inlet. Additionally, it comes with Blastrac’s ‘Up & Down’ system for easy transportation, and Longopac bagging system for a safe working environment as standard.
The last new development from Blastrac is the H class BDC-133HCUD dust collector, certified to EN 60335-2-69 Annex AA. This is equipped with the new generation of M class filter and secondary H14 HEPA filter. It has a manual hand shaker on its side, and possesses the same high suction power with three motors and an Ø70mm inlet as the BDC-133MUD. It also comes with Blastrac’s ‘Up & Down’ system and the Longopac bagging system making it ideal when handling hazardous materials such as asbestos.
News from Husqvarna
Those who follow this industry closely know that Husqvarna Construction Products recently acquired both the dust extraction equipment manufacturer Pullman Ermator, and floor grinding equipment manufacturer HTC, with the latter manufacturing its own dust extractors. Depending on the markets, the Pullman Ermator products are sold under the Pullman Ermator brand or the Husqvarna name.
Husqvarna itself has released the new 1phase Husqvarna W 250 P, which is a small, powerful industrial wet and slurry vacuum designed for tough jobs. This is achieved by using high quality stainless steel components and a powerful motor protected by a float. Recommended for concrete drilling, sawing, grinding and general slurry collection, it possesses ingenious solutions making the W 250 easy to work, with pumping out taking place at the same time as suction. Emptying is undertaken via a large bottom valve for simple cleaning. The non-marking wheels are puncture free and lock at the front. The air requirement is 160m3/h and the rated input power 1.2 kW.
HTC’s new dust extractor D60 was released last year (covered in PDi magazine), receiving the MIP Award at the World of Concrete show earlier this year, as well as top honours as the ‘Industrial choice’ in the dust control and accessories category. The MIP award program is arranged and presented by Hanley Wood in conjunction with the World of Concrete trade show in Las Vegas each year, and showcases products exhibited at the show that are the most innovative in the industry for a given year. This follows the success of the HTC Duratiq grinding machines, which won the same prize at WOC in 2017. The D60 is specifically designed for handling dust when floor grinding, with a focus on continuous operation. It is equipped with many smart features, such as automatic filter cleaning, an integrated pre-separator and a remote connection to the HTC Duratiq grinders.
“We at HTC are overwhelmed by the fantastic response the new Duratiq platform has received globally. The D60 dust extractor, with its connectivity function, is the logical expansion of this platform. To win another MIP award is a wonderful acknowledgement that we have created something that has met the market demand with a very high innovation level,” says Cathérine Königk, head of marketing at HTC.
Two new vacs from Klindex
The Italian manufacturer of equipment for concrete floor grinding and polishing, Klindex, is also involved in the development and manufacture of high efficiency dust extractors. Klindex recently launched two new models in its Supervak series, X2 and X3, with these two machines being, according to Klindex, the only single phase industrial dust extractors with an embedded cyclonic pre separator system. The Supervak X series is equipped with automatic ASC (airpulse cleaning system) tank, with air blasts regulated by an electronic timer that keeps filters clean. A pre separator cyclone is integrated in the drum, which can hold over 90% of the dust collected in plastic bags. The drum is shock proof, and has a very futuristic design fully produced in Italy.
The powerful motor is equipped with HEPA filter, with the design of the dust extractor making it easy to transport. The frame allows the shell of the machine to rotate up to 180°, which simplifies inspection and service. The Supervak X2 has two motors, each at 1600kW, with a maximum depression of 2,450 mm H2O. The filter surface area is 14,000cm2, airflow 520m3/h and weighs 113kg. The larger Supervak X3 has three 1600kW motors, a maximum depression of 2,450 mm H2O, filter surface area of 14,000cm2 and airflow of 600m3/h. The weight of the machine is 125kg, with the new machines both having the Longopac bagging system.
Oxysan revolutionising the workplace
Some years ago in Sweden, a new dust extraction technique for the construction industry was launched. The technology in itself was not new, but offered a very efficient way to control dust particles in the air, by ionizing the air in the workplace. The ionized air makes the dust particles lump together, and through increased weight, the particles fall to the floor, making them easy to be sucked up by a dust extractor.
The company Renluftsteknik AB (RLT) in Gothenburg, Sweden, has used the technique in its Oxysan series of air cleaners that was launched on the Swedish market some years ago. There are now four models in the Oxysan series: Oxysan 200, Oxysan 1000 and the larger Oxysan 2000 and Oxysan 4000. The complete Oxysan range has been upgraded recently, and the industrial ionizers today can cover a workplace area from 20m2 to 400m2. The technology is 100% ozone free, and not only eliminates hazardous dust, but also odours and bacteria, making it useful in many types of environments. Initially Oxysan was launched on the Scandinavian market, but since about a year ago, Renluftsteknik has developed a network of European distributors.
“In Sweden, our Oxysan range was welcomed with open arms when it was launched some years ago, and today many small and large construction firms are using our products successfully. We can now see a growing interest from contractors and industry in other European countries,” says Renluftsteknik’s sales and marketing manager, Håkan Andersson. He further adds that Skanska Rental in Sweden has a leading role in dust reduction and RLT has supplied it with 40 units of the Oxysan 2000 ionizers. These are used on a variety of jobs including a large renovation in the city of Umeå, where it was essential to minimise the number of harmful particles in the air.
According to RLT, Oxysan improves the working environment when compared to filter based air cleaners, by eliminating more than 90% of the airborne micro particles, and can, with more units combined, deal with quite large areas efficiently. The Oxysan units are also very easy to operate, transport and clean, as well as having lower operating costs than traditional air cleaners.
“It might seem like magic, but the technology behind Oxysan is quite simple. What happens is that when ionizing, the air is filled with positive and negative ions, which make the pollution in the air lump together to bigger and bigger particles, and at one stage they fall to the ground and stay there. After that it is very easy to suck them up with an industrial dust extractor, and you get an absolutely clean working environment,” says Andersson. He adds that traditional air cleaners suck up the particles in their filters, whereas with ionization it cleans the work area air, with Oxysan use also resulting in the air being more oxygen rich.
Oxysan’s lower operation costs are connected to lower filter consumption, reduced and easier cleaning work. By cleaning the pre filter and the coarse filter daily, the particle filter only needs to be cleaned weekly. Replacement of the pre and coarse filter should also be done weekly, while the particle filter can be changed on a three or six monthly basis depending on how dirty it is.
Oxysan 2000 and 4000 have been developed specifically for the requirements of the construction industry, being easy to dismantle, inspect and be cleaned. The 2000 and 4000 possess a G4 pre filter, a G4 coarse filter and a F9 particle filter. Normal power is 230V with 300W maximal energy consumption. The Oxysan 2000 has a noise level of approximately 60 dBA and a total weight of 55kg. This all means that users are able to achieve new levels of air cleaning thanks to the bipolar ionization process that eliminates more than 90% of the hazardous airborne particles with a diameter of 0.001 to 100µm. According to Renluftsteknik, these being significantly higher and safer than when using a traditional air cleaner.
vacuum cleaners from Scanmaskin
Last year, Scanmaskin launched two new industrial vacuum cleaners, ScanDust 8000 and ScanDust 3600 (these were featured in detail in PDi). The machines are equipped with Hepa filters that take care of any unhealthy particles, as well as being fitted with a filter guard that informs the user when to clean the filter. In order to keep the filters as clean as possible, its ‘jet-pulse; system cleans using pulses. The machine's coarse filter package is made of polyester with high degree of separation. The design and filter area of the two new machines are also designed to maximise suction capacity, with both the ScanDust 3600 and ScanDust 8000 being fully constructed in steel, as well as fitted with non-marking powerful, durable and puncture free tyres and comes equipped with Longopac.
Sila’s air cleaner best in test
Sila AB is a small manufacturer which has grown as more businesses become familiar with its offering. Recently the company’s air purifier, Sila 600A2, was named the best tested by the Swedish trade newspaper ‘Byggarbetaren’ (in English, ‘Construction Worker’). Andreas Lundin, sales manager at Sila, says that the Sila 600 has now been made even better. “Now, the customer also receives an operating time gauge, a filter hatch for fast coarse filter change, filter indicator, and then it has become half a kilo lighter as well. Therefore, we are now replacing the 2 with the 3 as the Sila 600A3 is here, "says Andreas.
In order to take as little space as possible in a doorway, the Sila 600A3 is built higher instead of wider, possessing a large filter area so as to be as effective as possible. Working at a rate of 600m3/h, it is ideal for working in confined areas such as bathrooms. It can deal with an area of up to 23m2 (for example: 2.5m ceiling height and airflow of 10 times per hour). The Sila 600A3 has two blowouts that enable the sending of clean air back to the work area, and also emitting air to create a negative pressure.
Additionally Sila’s patented ‘clean-up’ frame has become stronger and received the green Sila colour. "Now you can also buy a front connector and a clean-up connector as an accessory. With the front connector, the air cleaner can be placed centrally. The hose opening can easily be moved. The front bag is mounted on the suction side of the air purifier with four screws. The cleaner bag is connected to the hose end and is fitted with coarse filter,” concludes Andreas.