- Fast & Direct
- Product Portal
If your application involves suspended dusts, you need devices in the medium pressure range, such as dust extractors. Medium range means that a large volume of air must be moved through a large-diameter intake connection piece with a small amount of force. Therefore medium pressure devices have a weaker vacuum.
If your application involves dusts that don’t move (such as those that lie on the shop floor), you need devices in the high vacuum range, such as industrial vacuum cleaners. High vacuum means that a small volume of air must be moved through a small-diameter intake connection piece with great deal of force. This is why high vacuum devices have a strong vacuum.
Almost any dust or smoke produced by an industrial production process can be effectively extracted. When choosing the right filter, various criteria must be considered. However, the crucial ones are the medium to be extracted and its properties. For many materials there are special regulations to consider when choosing the right extraction solution. You can find an overview of the various dust types here. Also read points 3 to 5 below.
Because sawdusts can enter the lungs, special regulations apply to them. For devices with wood test certificate H3, 100% of air can be recirculated.
BGR 109 applies to grinding, brushing and polishing aluminium. It prescribes that extraction must be done by wet separation and that the devices must be tested by a certified body. Our NA-K models, series B and VA, have DEKRA prototype test certification, which means that they have already been tested by a certified body at production. This means that annual inspections by a qualified body are no longer needed.
Special guidelines apply to welding stainless steel, because stainless steel welding fumes are carcinogenic. Depending on how high the chromium/nickel content of the stainless steel is, devices with an IFA W2 or W3 test certificate are needed if air is recirculated. CrNi content between 5% and 30% requires a device with an IFA W2 test certificate. When CrNi content is above 30%, a W3 test certificate is needed. No test certificate is required for welding ordinary steel.
Not only in welding fume filters, but in nearly all devices, ESTA uses cleanable permanent filter cartridges. This eliminates expensive disposable filter replacement. Moreover, permanent filter cartridges last longer.
Dust class M:
This dust class is required for dry, toxic, non-combustible dusts with an occupational exposure limit (AGW) greater than or equal to 0.1 mg/m³. Devices with class M dust filters have filtration efficiency of 99.9%, and therefore a maximum transmission rate of 0.1%.
Examples: Ordinary steel dusts, textile dusts, sandstone dusts
Dust class H:
This dust class is required for toxic dusts that are carcinogenic or mutagenic. Devices with class H dust filters have filtration efficiency of 99.995%, and therefore a maximum transmission rate of 0.005%.
Examples: Stainless steel dusts, nickel dusts, cobalt dusts
ATEX comes from the French term for “EXplosive ATmosphere”. ATEX indicates the European Union’s ATEX guidelines. ATEX currently consists of two guidelines on explosion prevention. They are the ATEX production guideline (94/9/EC) and the ATEX operational guideline (1999/92/EC). These guidelines apply to devices and protection systems used in explosion-prone areas. Here you can find more information on ESTA’s ATEX program.
A dust/air mixture can explode if the following components meet in or around the device:
With combustible dusts, protective measures must be taken. The customer must check to see if such a zone exists. Based on this, ESTA can offer the right device. Here you can find more information on ESTA’s ATEX program.
Filter life mainly depends on the material used and the medium to be extracted. No generalization can be made. The filters in ESTA extraction devices usually have an integrated cleaning system and, with regular use, last an average of three years — depending on the type of dust involved.
If suction performance rapidly decreases despite cleaning, it may be time for a filter change. ESTA uses washable filter cartridges, so accumulated dust can be washed out of them. For metallic dusts, ESTA offers ultrasound filter cleaning. This special process restores filters to nearly original condition. If the filter can no longer be restored or washed, it must be replaced. For this, use only original ESTA filters.