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Mobile Fume Extractors
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Plymovent Extraction Fans
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FlexHood
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For the extraction of welding fumes, oil mist and dust you can use Plymovent fans. The wide range of Plymovent fans covers the demands of almost any application.
Safety alert from HSE: There has been a change in enforcement expectations for mild steel welding fume after new scientific evidence that exposure to mild steel welding fume can cause lung cancer and possibly kidney cancer in humans. As a result HSE has issued a safety alert, click here to read more.
Straight answers to the questions people ask most when choosing extraction fans for welding fume, oil mist and dust.
The fan creates the airflow that pulls contaminated air from the hood or arm, through the ducting and filter if there is one, and out or back into the workroom. Without enough airflow, even a good hood will not capture fume.Choosing the fan is a matter of airflow and resistance. It must move the volume of air needed at the pressure lost in the arms, ducts and filters.
Work out how many arms or hoods the fan will serve, how much air each needs, and how much resistance the ducting, bends and any filter add. The fan must provide the needed airflow at that resistance, not just in free air.Undersized fans give poor capture, while oversized fans waste energy and add noise. Ask the manufacturer or our team to help size it, giving details of the layout.
It depends on the electrical supply you have. Single-phase fans use a normal supply and are common for small, light-duty systems. Three-phase fans are used for larger loads and are usually more efficient on bigger motors.Check your supply voltage and phase before choosing, and have the connection made by a competent electrician. A three-phase motor must also be wired to turn the correct way.
Only if the maker states that the fan and its motor are suitable for outdoor use. Rain, damp, frost and temperature swings can damage motors, bearings and electrical parts, and a fan not built for it may fail early or become unsafe.Check the data plate and manual for your own fan for its protection rating and any cover or mounting requirements, and fit it exactly as instructed. Position the exhaust discharge well away from air inlets, windows and doors so that extracted air is not drawn back in.
Common causes are an unbalanced or dirty fan wheel, worn bearings, loose mountings or housing, a damaged inlet or outlet, and airflow turbulence from tight bends close to the fan. A fan running outside its intended range can also be noisy.Isolate the fan before inspecting it. Clean and rebalance or replace the wheel, tighten fixings, and fit anti-vibration mounts or silencers if needed.
A fan wheel is shaped to move air when it turns the intended way. On a three-phase motor, swapping any two phase connections reverses the rotation. Running backwards can sharply cut the airflow, or on some types push air the wrong way, so extraction may be weak even though the fan sounds and feels normal.Check the direction against the arrow marked on your fan, and the manual, when it is first wired and after any electrical work. Have the connections made and checked by a competent electrician, with the supply isolated.