Air Cleaning Blog

Updates and news about Puravents range of air cleaners, electrostatic filters, and oil mist eliminators and oil mist recovery.

Industrial Air Purifiers

Background to the StaticAir Industrial air purifiers

There is a lot of pressure to ensure that workplaces have clean air. Under pressure from occupational health regulations and a general duty of care, employers need to be able to demonstrate that they are compliant with current regulations. But it’s not just people who require clean air.  Maintaining clean air state is beneficial for many industrial processes, raw materials, components, and finished goods.

The standard solution to cleaning air used to be an air cleaner and a standard air cleaner was an arrangement of a fan and some filters in a box. Dirty air in one side – filtered air out the other. So old hat.

In the domestic environment there have always been ionisers. These where not air cleaners in the normal sense, and did not have a fan and filter but they did produce lot of ions that charged dust particles, which helped to encourage the dust with a charge to stick to surfaces. They worked to an extent.

New design for industrial air purifiers by StaticAir

StaticAir has a new and fascinating take on industrial air purifiers. Taking the basic principle of the domestic ioniser and applying some serious engineering and scaling up, it has developed a range of induStaticAir PMX passive air cleaner - new type of industrial air purifiersstrial air purifiers. These industrial air purifiers are a very capable new entrant to the market place for big air cleaners for big places.

What makes them brilliant is the lack of fan. In fact these industrial air purifiers are all solid state. No moving parts.

Part of the process is to discharge ions onto the air in huge quantities. The other part of the process is to have a collector surface of opposite charge to the charged dust particles, to attract them. Now this is similar to conventional electrostatic air cleaners that have a fan which creates an air flow. But as mentioned earlier – there is no fan.

Introducing Ionic Wind

Let me take you on a diversion. You may remember ionic propulsion as being a science fiction notion to propel space ships. Well it might be handy for space ships but it also has an application on planet earth. Air cleaners. When ions are produced by a ioniser and there is an opposite charge surface near by, the ions transfer from one to the other. This create a flow of ions on one direction. Ions attach to particles and in their own right and when attached to particles, their flow from one surface to another induces air movement. This air movement created by a flow of ions has broken new ground recently by being the means of propulsion for the first aeroplane to be driven by solid state electrics. Just think about it – a plane with no moving parts that can sustain itself in flight using ionic wind for propulsion. Search for ‘ionic wind plane’ in YouTube and see for yourself.

So how do StaticAir industrial air purifiers clean air?

industrial air purifiers - how they work

How it works in a nutshell

StaticAir PMX industrial air purifiers in an metal working applicationBy creating a huge quantity of ions with the ioniser wires and having the other components either neutral or oppositely charged to the ions,  a constant stream of charged particles is drawn to the unit.

The ionic wind enters the air cleaner between a pair of the gills on the unit turns and is discharged via the two adjacent slots.

By turning the ionic wind in this way the charged particles are inclined to move towards the collector surface of the air cleaner both by centrifugal force and also by opposite charge attraction of the collector plates.

What makes StaticAir industrial air purifiers so effective?

With traditional air cleaners using filter technology the smallest, most harmful particles are the hardest to remove from the airstream. Of course there are air cleaners with HEPA filters of various grades that can catch the smallest particles but they are not only expensive to replace but it is also expensive to run the air cleaner fan to push the air through them. That running cost increases as the filter gets more laden with dust.

The brilliant thing about StaticAir industrial air purifiers is that they are at their best and most effective on the particle size range that is most challenging and expensive for conventional air cleaners. Removing the most harmful particles i.e. fine particles below 2.5 micrometers in size, is where the StaticAir units are so effective.

All the while they are working at removing dust particles, they are only consuming a miniscule 18 watts per air cleaner. Even better news is that they don’t use air filters so there is no ongoing burden of replacing filter.

The StaticAir industrial air purifier range.

Findures passive air cleaner from the StaticAir industrial air purifiers range

StaticAir Findures passive air cleaner

Pamares passive Air Cleaner from the StaticAir industrial air purifiers range

StaticAir Pamares passive Air Cleaner

PMX passive air cleaner from the StaticAir industrial air purifiers range

StaticAir PMX passive air cleaner

FDRS passive air cleaner from the StaticAir industrial air purifiers range

StaticAir FDRS passive air cleaner

Where are StaticAir industrial air purifiers used?

Perhaps the most obvious application is industrial workspaces such as those found in the metal working and wood working sectors. Welding fumes, fugitive dust grinding and surface finishing are all suitable challenges. Oil mist and smoke from metal milling and hot surface treatments are best treated with Trion electrostatic air cleaners. But if the dust is a dry dust then StaticAir industrial air purifiers are an excellent choice. But these air purifiers have far wider application than just industry. They are also used in…

  • livestock buildings particularly poultry sheds.
  • outdoor street environments to reduce ambient concentrations of diesel soot particles from traffic
  • waste processing environments
  • primary industries such as quarrying, and stone processing
  • leisure sector particularly gyms where chalk is used.
  • indoor car parks
  • road and rail tunnels

If you would like help with finding the ideal industrial air purifiers solution to your application get in touch 01729 824108








Trion IMP 38 Electrostatic oil mist eliminator

Oil Mist Eliminator for Marine Engine Breathers

How do you prevent oil mist from a ships’ engine filling the engine room and other parts of a ship? Oil Mist Eliminator for Marine Engine Breathers

Typical large marine engine that benifits from Trion IMP 38 oil mist capture

Typical large marine engine that benefits from Trion IMP 38 oil mist capture

All internal combustion engines have a ‘breather’ which is basically a system of pipes  which connects the crankcase and cam shaft casing to atmosphere, ensuring that those spaces are not over pressured by combustion gases leaking past the piston ring seals and valve sleeves. Moderate leakage of combustion gases ensures that there is always a movement of gas along the breather pipe to atmosphere, and inevitably there is some oil mist that is discharged out of the breather pipes. Most small engines have some primitive oil mist eliminator for catching this mist and if properly designed the oil mist once captured should drain back to the sump. On very large engines such as those found on auxiliary power and marine applications something a little more sophisticated is called for.

Trion IMP 38 Electrostatic oil mist eliminator

Trion IMP 38 Electrostatic oil mist eliminator

On large marine engines the IMP 38 oil mist eliminator finds an ideal application.  From large marine engines the steel breather pipe is usually either 2, 3, 4, 6, or 8″ Ø. The pipe layout usually has an upward run before it reaches atmosphere,  so that oil mist can impinge and condense on the walls of the pipe as it cools before draining by gravity back to the sump of the engine. Without any active mechanism for collecting oil mist the smaller oil droplets would be discharged into the general air space, where in time they would settle on surfaces and become a hazard and cleaning burden.

IMP 38 Electrostatic air cleaners treating marine engine breathers

A pair of IMP 38 Electrostatic oil mist eliminators treating marine engine breathers

The IMP 38 is a clever electrostatic air cleaner that is made by Trion, and which is designed to connect to pipelines that carry oil mist from engines or indeed any other lubricated and enclosed machine. The IMP 38s come do not have a fan as they rely on the airflow that pre exists in the pipeline. As the mist enters the cleaner the spiked ioniser section gives each oil droplet charge, so that as it then flows through an array of oppositely charged collector plates there is an attraction between the charged oil mist droplets and the collector plates. In short the oil droplets hit the plate and the collected oil drains off under gravity back to the pipe and the sump. IMP 38 comes in various sizes with airflow capacity ranging up to 1020m3/hr and with plain, threaded or flanged pipe connections to make connection to the various pipe sizes easy.

IMP 38s electrostatic oil mist eliminator have almost no pressure drop so they have no impact to speak of on the efficiency of the engine. Moreover, they are well specified, meeting stringent requirements of military specifications MIL-S-901D, MIL-STD-167, MIL-STD-461, covering high impact shock, environmental vibration , and electromagnetic interference.

On engines burning cleaner fuels IMP 38s should run for long periods with little maintenance returning oil back to the sump, however the heavier and dirtier the fuel type, the more often the collector cells in the units will need to be cleaned.

Of course marine engines are only one application for IMP 38s – they are also used for gas turbines, auxiliary engines, large compressors, storage tanks, and vacuum pumps.

For more information and help on these oil mist problems call us 01729 824108. All we need is the pipe size, airflow through the pipe and your preferred connection detail and we can specify the ideal IMP38 for your application



Air Purifier or Air Cleaner – Its a definintion thing

It’s reasonable for a layman not to know the difference but,  surprising when even people in the industry don’t appreciate the difference.  What on earth am I babbling on about?

Air Purifier or Air Cleaner?

Generally speaking the layman will use ‘air purifier’ as their description of what they are after and generally speaking suppliers of these machines will quietly assume that the layman may be looking for either an air cleaner or an air purifier, then ask a few questions in order to discover which.

Just in case you don’t know, air purifiers work at a molecular level and in broad terms tinker with the chemistry of the air, or indeed the DNA of micro organisms, and air cleaners move air through a filter medium or mechanism to remove particles and or droplets.  Basically;

  • Air cleaners – remove lumpy stuff and droplets.
  • Air purifiers – alter chemistry and biology

I nearly fell off my chair when I read a brand new manufacturers brochure (old expensive paper type) where consistently air cleaners were being described in print, as air purifiers. Now as one of the biggest manufacturers in the market this may be viewed as a surprising error. Actually no. The surprising thing is that it was a printed mistake. If it had been a webpage or pdf file then no mistake. You see this is one of the many examples where web search traffic is driving the development and meaning of language.

I mentioned the layman earlier. If fault has to be laid down somewhere, it is at the layman’s door. Because people search for ‘air purifier’ over 10 times more often than ‘air cleaner’, irrespective of what they are actually looking for, suppliers keen to have their products found in the market, wrestle with the problem for a few moments and then relabel their air cleaners as air purifiers. This over time reinforces the use of language as browsers are rewarded with the numerous  air cleaners (labeled as air purifiers) and actual air purifiers.

So whats next? There is no doubt that ‘air cleaner’ is becoming a term of the past, and it will come to pass that air purifiers will be subdivided into air cleaners, Ionizers, UV air purifiers etc.  As pig headed traditionalists we will continue to buck the trend and refer to air cleaners as air cleaners, but whether our market will know what we are on about is another matter. Feel free to visit our website for more information on products and services.

 Air Purifier or Air Cleaner

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