Here you'll find the most frequently asked questions & answers

We stock the widest range of dust and fume extraction products in the country – however there are many other products available in the market and advice can be confusing and conflicting! Our approach is to sell quality products for long life backed by technical expertise based on our 3 global supplier’s experience. If there is an issue that you would like explained contact us and our Sales or Engineering staff will assist you as quickly as we can.

General Questions

Stock items are dispatched the same day if you place your order by 3pm.

 For orders including a big number of items, we may need an extra day.

Small Orders:  We use Courier delivery if the item is less than 1.5m long so you can receive it the following day at North and South Island addresses. For the South Island there is a choice of overnight courier or a cheaper 2 day service.

Large Orders: Large items to a North Island address generally arrive the following day.

Large items via a  Freight company to the South Island will take 2 days to Christchurch addresses and a further forwarding day to other cities. More remote parts of the country e.g. RD addresses, may take longer due to the freight company schedule but they will still have left us the same day you ordered.

Special ex Stock items: If we need to make up some specific parts, not ex stock for you, like connecting branch pieces that are not standard  ‘on shelf’ sizes,, please allow 3-4 working days for manufacture and dispatch.

All these products are ex stock in our Auckland warehouse –for your convenience we hold stock here in NZ not Australia or elsewhere.

 If you know what you need, ask for a Freight inclusive Quote, see Shop Our Products, pay by bank transfer, or call with your credit card, and the goods will leave the same day. 

There is no set size. It depends upon the dust type and volume, but most importantly it depends upon the amount of air that needs to be extracted to capture this dust.

 If you expect a small filter to handle too much air, the dust gets driven deep into the fabric of the filter media (filter socks) and blocks. No one has a magic bullet here, anyone claiming ‘their’ system can miraculously deal with more air than everyone else’s, should be treated with scepticism.

 Like everything else in life, you get what you pay for!  Ask to talk to one of our sales staff. We use the JKF principle of a LOW pressure, big filter area for longer lasting socks.

People confuse fan power with filtration performance, like confusing car engine size with speed.

 It’s not the fan motor size that’s necessary important, it’s also the filter unit’s ability to deal with the air volume. You note we say air volume not dust volume. Very seldom is a filter too small to handle the dust load, 99% of the time it’s the air volume that’s the problem.

Ask to talk to one of our sales staff.

Dust laden air is cleansed and the dust or fumes trapped by the filter material.

 It’s the ratio of filter material to air volume that’s important.

 If 10,000m³ of air enters a filter, and the filter has 100m² of filter material, each square metre of filter material will have to deal with 100m³/h of air and dust passing through it.

 If the air volume is 20,000 then the amount is doubled.

Filters correctly sized build up a layer of dust on the surface called the ‘dust cake’. Dust cake forms part of the filer process aiding the dust separation. If this ‘cake’ consistently builds gently and falls off the surface of the filter material, then the filter will work a long time with little or no maintenance.

If you increase the air volume too much, the dust gets driven by the high air speed so the ‘cake’ forms in the material membrane and ruins the filter unit.   

Some salesman will tell you “our filters can cope with more filter load than everyone else”.

 Treat this with great scepticism. There are only a handful of quality filter material manufacturers in the world, and most reputable dust extraction companies buy from these same companies. More expensive antistatic cloths will perform better than cheaper standard cloth, but if one company really had a ‘better’ performing cloth than everyone else, everyone would immediately use this material.

There are coatings to deal with specific types of dust or fumes, for example oil repellent or high temperature. However there generally is no such thing as a ‘super cloth’ that make one filter unit better then another for the same application.

We can see duct particles down to about 50 microns wide.

  • 1-10 microns – this is the dust size that we need to worry most about.
  • Particles above 10 microns, get trapped in our saliva, nose, throat and either gets expelled out again as we breathe or flushed though our bodys with fluids at tea breaks!
  • The dust below 1 micron, goes into our lungs and out again as we exhale.

 However a percentage of dust between 10 microns and 1 micron enters the lungs and some becomes trapped. This is the dust we need to remove from the workplace.

  • The dust that does you the most harm, you cannot see!
  • Modern filters, CORRECTLY SIZED AND INSTALLED, remove 99.998 % of dust to below 1 micron.

V8 Commodore and Falcon run on the same petrol as a 1990 Corolla. Both are suited to different needs.    

Small portable units have the same cloth material, but are subjected to several times the air to cloth ratio of what experienced filtration companies recommend. If you run one machine for 20 mins in the garden shed at weekends they are acceptable, ( that’s what they were designed for), but for a production facility operating all week, looking after their employed staff, they are not sufficient.

These small portable units were banned from workplaces in Europe decades ago.

  • They clog quickly
  • pressure builds, suction drops off
  • and they release the fine sub 10micron particles we need to avoid.

 If you look at a small portable in a factory after a few months usage, it’s usually surrounded by fine dust everywhere. So it doesn’t work in this situation does it?

Our Philosophy:

We are a Family owned business. We are not interested in today’s short term profit but in long term satisfied customers. The filters we supply are made by Danish Company JKF Industri. They have 60 years of filtration experience of all types of dust and fumes in over 80 countries. They know from experience what gives years of trouble free performance to exacting European Standards. We follow their guidance.

If you have a problem with a filter from us, you don’t have just our experience to draw upon but also the experience of the most technically advanced, most energy efficient and safest dust filtration product manufacturer in the world. 

THERE IS NO SUCH THING AS FREE!  (THE Machinery salesman know how much he has to add to get the total price to give away the ‘FREE ‘filter)

The reason its ‘free from the machinery supplier is that they understandably don’t want to lose the machine sale by telling you that you need to spend another $15-$25,000 on a bigger fan and filter. His competitors will be giving a “Free” filter and he can’t afford not to be competitive.

Just remember to check the air to filter cloth ratio.

Many people try to solve this situation with a bigger fan however if the fan has not been properly specified, the duct velocity may not be constantly achieved throughout the whole system length.

You need to calculate the pressure loss in the duct (friction in the duct as the air flows though it) and the ability of the fan to overcome this. Then the filter will have a pressure loss to also consider.

The more your system is designed to maximise air flow, (and minimise the loss in flow due to friction in the duct and filter), the less it will cost to run over time.

  • Have you added machines and duct runs to the system over time, but kept the original fan and filter?
  •  When was the last time you changed the filter socks?
  • If you have 12 machines, but only 3 staff operating them, maybe most of the suction is being wasted and fitting a few shut off valves (Blastgates), is all that is required to be able to get the best usage of the current extraction available.

Give us a ring, it costs nothing for us to visit and if all you really need is some new socks, we will tell you where to you can get them.

 If we feel you need a new system, we will also provide you with what you need at a very competitive price.

Ring us first and discuss the problem.  Provided you are seen to be doing ‘something’ about the problem, you should get a more understanding reaction from the Inspector. By doing nothing’ you will end up with problems and possibly fines.

Normally we will try to visit your site to discuss the concerns with you and suggest a range of solutions, provide a Quote, and explain how this will not only solve your immediate problem but  keep you compliant in the future, with any production increase or changes to staff numbers. Cost is always an issue, but the inspector is interested in improving the situation and if they can see a reaction and a planned programme of improvements in place over a reasonable period, AND IT DOES ACTUALLY HAPPEN, they are more likely to advise than issue fines.    

Remember, any system we provided will be to the same standard as that in any Western European factory. In the very unlikely event you still are not considered compliant, we will assist you with the authorities if necessary.

Most sites require an inspection from our staff to decide which is the best solution for your circumstances.  It depends upon the size required but we have provided installations from under $10,000 to over ½ million dollars.

Our ducting, fans, filters fume arms and all other products are specified, warranted and guaranteed to perform as stated. Using quality European suppliers we have full access to every single products technical specification, performance and reliability.

  • We will not sell you something you don’t really need
  • We will not sell you a ‘quick fix’ solution that doesn’t work to our ‘European’ suppliers standards
  • We will sell you a solution that is future proofed

For simple items you can do this yourself if you wish.

If we install, it’s done buy our own employees not contactors. Our staff are installing our products every week. If you accept our Quote and don’t change things around before they start the install, the quoted price is the price you pay. There are no extras that are not clearly stated in the Quote.

A huge advantage for our own install team is that they have access to the stock and staff in our warehouse and if anything has changed and extras are needed or a duct size suddenly needs changing on a run, the extra stock required will be sent to your site immediately saving you money by allowing them to work efficiently – they won’t wander off to another job because they are waiting for parts to finish the fit.

Not all Anti-static flex is created equal.

There is nothing in NZ Standards defining what is and isn’t ‘antistatic’. Any old bit of flex could be described as such. It’s up to the salesman.

Our flex is manufactured in Germany by Schauenburg, one of Europe’s two leading flex manufacturers. In Germany 10 to the power 8th (108) is the minimum measurement accepted to be labelled ‘antistatic’.

 Ask the supplier for written proof of the antistatic rating claimed, as there are many products in our market that would not be acceptable as ‘antistatic’ for Safety reasons in Europe.

Use of a properly specified antistatic flex is essential in high risk areas e.g. explosive dusts and materials such as sugar, flour milling, and wood dust

For this reason our product is stamped a t metre intervals o you can confirm it is what you are expecting.

  • Genuine Anti-static flex allows the static charge to disperse – less risk of arcing - safer
  • The Anti-static properties are contained within the actual wall material
  • The chances of getting ‘shocks’ or ‘belts’ by accidentally by touching the  flex are eliminated – more staff comfort and especially important in schools
  • The build-up of powders adhering to the internal walls are minimized

For  explosive material we recommend  the helix wire should also be grounded as a safer working practise

Our European manufactured FUME Cubes, using the standard 160mm dia Fume Arm with a 3 metre reach, draw 1000m³/h. These fume arms with swivel  pivot and easily manoeuvred heads using the all-round grab handle, are designed to easily be positioned by welder and repositioned constantly as he is working.

  • For maximum effectiveness, a  welder should position the hood at an angle as close to the fume source as possible without it obstructing his work. The metal hood can take the heat unlike cheaper models on the market with plastic hoods
  • The fumes should be drawn AWAY from the worker – not towards him.
  • Extraction should be started BEFORE the welder begins operating so the air is flowing – this avoids eddies and the possibility that the disturbed air redistributes the toxic fumes.

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