Fume Extraction Systems

Welding, cutting, soldering and chemical processes produce ultrafine metal particles, toxic gases and solvent vapours. Many of these particles are small enough to reach deep into the lungs and enter the bloodstream. Effective workplace fume exposure control is the most direct way to prevent respiratory disease, metal poisoning and long-term health damage among your workforce.

A welder's face is often only 30 to 60 cm from the arc, directly in the path of the rising fume plume. Source capture fume extraction pulls the plume away before it crosses the breathing zone. General ventilation cannot do this; it only dilutes fumes after workers have already inhaled them.

Indian occupational safety law requires employers to remove dust and fumes at the source and keep exposure within permissible limits. Factory inspectors, pollution control boards, OEM customers and export auditors increasingly expect documented proof of effective extraction. A properly engineered and commissioned system gives you that evidence.

Uncontrolled fumes settle as a fine, oily or metallic film on machines, electrical panels, lighting and finished goods. This deposit leads to sensor faults, overheating and extra cleaning labour. Fume extraction keeps surfaces, controls and products cleaner for longer.

Clear air improves visibility at the weld pool, solder joint or laser head, which means fewer defects and less rework. Workers who are comfortable stay focused and productive, and absenteeism from fume-related illness drops. In electronics and precision manufacturing, clean air also protects sensitive components and optics.

Welding fumes are a mix of fine metal oxide particles and gases such as ozone, nitrogen oxides and carbon monoxide. Mild steel produces mainly iron oxide and manganese, while stainless steel adds chromium and nickel compounds. MIG/MAG and flux-cored welding generate high fume volumes, making welding fume extraction a priority in any fabrication shop.

Heating solder flux releases rosin (colophony) smoke, a known respiratory sensitiser that can trigger occupational asthma. Lead-based solders add metal particles to the plume. Solder fume extraction at each workstation protects operators in electronics assembly, repair and rework areas.

CO2 and fiber lasers vaporise the material they cut or mark, producing very fine particles and gases. Acrylic, wood, leather and coated metals each release different compounds, and PVC releases corrosive hydrogen chloride. A dedicated laser fume extractor keeps the optics clean and the operator safe.

Plasma, oxy-fuel and thermal gouging produce dense metal fume, hot sparks and large volumes of nitrogen oxides. Plasma table fume extraction usually combines a downdraft or zoned cutting table with a spark-protected, self-cleaning filter unit.

Painting, coating, cleaning, printing and mixing operations release volatile organic compounds such as toluene, xylene and acetone. These are gases, not particles, so they require activated carbon, oxidation or exhaust to outdoors. VOC fume extraction also reduces fire and explosion risk in solvent areas.

Pickling, electroplating, etching and battery processes release acid mists and fumes such as sulphuric, hydrochloric, nitric and chromic acid, as well as caustic alkali mist. These fumes corrode ordinary steel ducts and fans. They need corrosion-resistant ductwork and wet scrubbers for neutralisation.

CNC machining, grinding and heat treatment create fine oil and water-based coolant mist that coats machines and floors. Oil mist also creates slip hazards and skin and lung irritation. Machine-mounted oil mist collectors capture and return the oil for reuse.

Rubber mixing, vulcanising, moulding and plastic extrusion release a complex mix of particulates, odours and organic compounds. PVC processing can release hydrogen chloride. These processes typically need hood capture combined with carbon filtration or exhaust to outdoors.

Furnaces, foundries, burn-off ovens and diesel engines generate smoke, soot and combustion gases including carbon monoxide. Vehicle exhaust extraction systems capture diesel and petrol exhaust directly at the tailpipe in service workshops and test bays. Smoke extraction systems and smoke extractor fans keep these gases away from workers.

Regular exposure to welding, soldering and chemical fumes irritates the nose, throat and lungs. Over time it can lead to bronchitis, reduced lung function, occupational asthma and increased vulnerability to lung infections. Ozone and nitrogen oxides from welding and cutting add further lung irritation.

Welding or cutting galvanised steel and other zinc- or copper-bearing metals can cause metal fume fever. Symptoms resemble flu, with fever, chills, muscle aches, nausea and a metallic taste, usually appearing a few hours after exposure. Repeated episodes are a clear sign that fume capture at the workstation is inadequate.

The International Agency for Research on Cancer (IARC) classifies welding fumes as carcinogenic to humans. Welding and cutting stainless steel releases hexavalent chromium and nickel compounds, both known human carcinogens linked to lung cancer. Electroplating with chromic acid is another major source of hexavalent chromium, while manganese in welding fume is associated with neurological damage.

Solvent vapours can cause headaches, dizziness and drowsiness in the short term. Prolonged exposure is associated with damage to the nervous system, liver and kidneys, and some compounds such as benzene are known carcinogens. VOC fume extraction with carbon filtration or outdoor exhaust is essential in painting, coating and chemical handling areas.

Occupational exposure limits (OELs) set the maximum airborne concentration of a substance a worker can be exposed to over a working shift. Indian occupational safety law prescribes permissible exposure levels for many chemicals, and employers widely refer to ACGIH Threshold Limit Values for substances not covered. Limits for carcinogens such as hexavalent chromium are extremely low, so meeting them is practically impossible without effective source capture.

A welding fume extraction arm is a flexible, self-supporting arm with a capture hood that the operator positions near the work. Flexible extraction arms are available in different lengths and reaches, wall-mounted or on a slewing bracket. Fixed fume extraction hoods, canopy hoods and slot hoods suit tanks, ovens and fixed processes.

On-torch fume extraction guns have a suction nozzle built into the MIG/MAG welding torch. Because the capture point moves with the arc, they remove fume right at the source without the welder repositioning an arm. They work with high vacuum fume extraction units that operate at low airflow but high suction pressure.

A welding downdraft table pulls fumes downward through a perforated worktop, while a backdraft table draws them horizontally into a rear hood. Both are ideal for grinding, small welding jobs, plasma cutting and bench work where arms would get in the way.

Fume extraction ductwork connects capture points to the filter unit and fan. Material is chosen for the application: galvanised iron for welding fume, stainless steel for high-temperature or hygienic duty, and polypropylene or FRP for corrosive acid fumes. Balancing, isolation and motorised dampers control airflow to each branch.

Spark arrestors and pre-separators use baffles, mesh or cyclonic action to cool and remove hot particles. Pre-filters capture coarse dust. Both extend the life of the main filters and are critical for fire safety in welding, grinding and cutting applications.

Cartridge filters with pleated synthetic or nanofibre media capture fine welding and cutting fume at high efficiency. HEPA filters add a final polishing stage for very fine or hazardous particles. A cartridge fume extractor is the standard choice for most particulate fume applications.

Activated carbon fume extraction adsorbs gases, odours and VOCs that particle filters cannot stop. Impregnated carbons are used for specific gases such as acid vapours, ammonia or formaldehyde. Carbon beds are sized for the gas load and replaced when saturated.

Wet scrubbers wash acid and alkali fumes from the air stream using water or a neutralising solution. Packed bed scrubbers are the most common choice for pickling, plating and chemical process exhaust. They are typically fabricated in PP or FRP for corrosion resistance.

The fume extraction fan is the heart of the system. Centrifugal fume extraction fans deliver the static pressure needed to pull air through long ducts and filters. Fan construction is matched to the duty, including spark-resistant, flameproof or corrosion-resistant versions where needed.

Modern systems include starters, VFDs, arc-sensing auto start/stop, fume extraction airflow monitors and fume extractor differential pressure gauges. These controls show when filters need cleaning or replacement and help the system run efficiently with minimal supervision.

A portable fume extractor or mobile fume extraction unit is a self-contained filter, fan and extraction arm on wheels. It can be moved to wherever work is happening, making it ideal for maintenance teams, site work and small workshops with one or two welders. A portable welding fume extractor is also a cost-effective first step for plants starting their fume control journey.

A wall mounted welding fume extractor combines a filter unit and one or two extraction arms fixed at a dedicated welding bay. It saves floor space, avoids trailing hoses and suits fixed workstations where the same job is repeated daily.

A centralized fume extraction system connects many extraction arms, hoods or tables to one large filter unit and fan through a ducted network. Central welding fume extraction is the preferred choice for fabrication shops and production lines with several welding stations. It offers lower running cost per station, easier maintenance and a cleaner shop floor.

On-torch fume extraction captures fume at the torch nozzle using a high vacuum unit. Compared with an extraction arm, it needs far less airflow and requires no repositioning, but the torch is slightly heavier and gas shielding must be carefully balanced. Extraction arms are more versatile across processes, so many plants use on-torch extraction for long MIG welds and arms for everything else.

Enclosed welding booths and robotic welding cells are best served by an enclosed fume extraction system with an overhead hood or ceiling extraction. Enclosure contains fumes, sparks and arc glare, so a lower airflow achieves excellent capture. High volume fume extraction is used where robots produce continuous fume.

A benchtop fume extractor, also called a table top or solder station fume extractor, sits beside the soldering iron and captures flux smoke with a small nozzle or arm. Multi-station industrial solder fume extractors serve entire electronics assembly lines from a single unit.

A laser fume extractor is sized to the laser's exhaust port and material. CO2 laser fume extractors for engraving acrylic, wood and leather typically combine particulate and carbon filtration, while fiber laser fume extractors and laser marking fume extractors focus on fine metal particles. A properly matched fume extractor for laser engravers protects both the operator and the laser optics.

Oil mist collectors mount directly on CNC machines, grinders and heat treatment equipment. They capture oil and coolant mist through coalescing or electrostatic filters and drain the recovered oil back to the machine sump.

Laboratory fume extraction is provided by ducted fume hoods that exhaust vapours outdoors or ductless fume cabinets that filter them through carbon and HEPA filters. Lab fume extractors and snorkel-type arms are also used for local capture at benches and instruments.

Acid fume scrubber systems combine tank-side lip hoods, PP or FRP ducting, a packed bed wet scrubber and a corrosion-resistant fan. They are essential for electroplating, pickling, etching, PCB fabrication and chemical process plants.

Mechanical filters physically trap particles as air passes through the media. Pleated cartridge filters with nanofibre or PTFE-coated surfaces capture submicron welding and cutting fume efficiently in a compact size. HEPA filters are used as a final stage where very high efficiency is required, such as before recirculating air or in laboratories.

A pulse jet fume collector uses short bursts of compressed air to knock accumulated dust off the filter cartridges into a collection bin. This keeps pressure drop stable and extends filter life significantly, which makes it the standard choice for centralised welding, plasma cutting and grinding fume extraction. A pre-coat of inert powder is often used to protect cartridges from sticky or oily fume.

Electrostatic filters charge particles and collect them on oppositely charged plates. They offer low pressure drop and washable, reusable cells, and they are well suited to oil mist, smoke and light fume loads. They are less suitable for heavy welding fume, where cleanable cartridge filters perform better.

Activated carbon adsorbs VOCs, solvent vapours and odours onto its highly porous surface. Impregnated carbons are chemically treated to capture specific gases, such as acid gases, ammonia, mercury vapour or formaldehyde. Correct carbon quantity and air contact time are essential to prevent early breakthrough.

Packed bed scrubbers pass fume-laden air upward through a bed of plastic packing irrigated with water or a neutralising chemical, absorbing acid and alkali fumes efficiently. Venturi scrubbers accelerate the air through a narrow throat where liquid atomises and captures fine particles and mists. Both are widely used for chemical fume extraction and process exhaust treatment.

Coalescing filters capture tiny oil droplets, which merge into larger drops and drain away. Multi-stage coalescing units, often followed by a HEPA stage, handle both neat oil and water-soluble coolant mist from machining centres.

For high-volume or high-concentration VOC emissions, such as from paint shops, coating lines and chemical plants, thermal oxidisers burn the solvents at high temperature. Catalytic oxidisers achieve the same result at a lower temperature using a catalyst bed, which reduces fuel consumption. Regenerative designs recover most of the heat to cut running costs further.

For decades, the Factories Act, 1948 required employers to remove dust and fumes at the source, prevent accumulation in workrooms and keep exposure to hazardous substances within prescribed limits. The Occupational Safety, Health and Working Conditions Code, 2020, operative since 21 November 2025, has consolidated the Factories Act with other labour laws and carries these duties forward. As states notify their rules under the Code, the practical expectations established under State Factory Rules, such as the Maharashtra Factories Rules, remain the working benchmark for most plants.

ACGIH TLVs are among the most widely used occupational exposure limits worldwide, including by Indian safety professionals and multinational plants. They set eight-hour time-weighted average limits for individual fume constituents rather than for welding fume as a whole. For example, the TLV for manganese is just 0.02 mg/m³ as respirable particulate, a level that requires effective source capture to meet consistently.

ISO 21904 covers equipment for capturing and separating welding fume. Its parts set general requirements for extraction equipment, test methods and marking for separation efficiency, capture efficiency of on-torch extraction devices and the minimum airflow for capture devices. Specifying equipment tested to ISO 21904 gives you confidence that filter efficiency claims are genuine.

ASHRAE 110 is the widely used method for testing laboratory fume hood performance, combining face velocity measurement, smoke visualisation and tracer gas containment testing. EN 14175 is the European standard series covering fume cupboard design, type testing and on-site testing. We use these methods to verify laboratory fume extraction during commissioning.

Where fumes are exhausted to atmosphere, the Air (Prevention and Control of Pollution) Act, 1981 and Central Pollution Control Board standards apply. State Pollution Control Boards, such as the Maharashtra Pollution Control Board, set stack, emission and monitoring conditions in your Consent to Establish and Consent to Operate. Compress India designs scrubbers, stacks and sampling ports to support these consent requirements.

We start by identifying every fume source, the materials and consumables involved, the process duty cycle and the likely contaminants. This hazard assessment decides whether particle filtration, carbon, scrubbing, oxidation or outdoor exhaust is required, and whether recirculation is an option at all.

The capture method is matched to how the work is done. Fixed repetitive jobs suit enclosures, booths or hoods; varied fabrication suits flexible extraction arms; long MIG welds suit on-torch fume extraction; small parts and grinding suit downdraft tables. Enclosing the process as much as practical always reduces the airflow needed.

The fume capture velocity needed at the source for welding is typically in the range of 0.5 to 1.0 m/s, depending on the process and cross-drafts. Air velocity in front of a hood falls off sharply with distance, which is why airflow is calculated using the relationship Q = V × (10X² + A), where X is the distance from the hood and A is the hood face area. A standard extraction arm typically needs around 800 to 1,200 m³/h, while on-torch extraction needs only a fraction of that at much higher suction.

The extraction hood should sit close to the source and slightly above or beside the work, with the plume moving naturally toward the hood rather than past the welder's face. Arm reach, mounting height and slewing range are planned for each bay so operators can reposition the hood easily as the job moves.

Filtration stages are selected in sequence: spark protection and pre-filtration, main particle filtration, then carbon or scrubbing where gases are present. Filter area is sized to keep the air-to-cloth ratio within the manufacturer's limits, which controls pressure drop and filter life.

Fume extraction duct velocity is typically maintained at around 10 to 15 m/s for welding fume to prevent particles from settling. Ducts are sized branch by branch, with smooth long-radius bends, angled branch entries and balancing dampers to deliver the design airflow at every station.

The fan is selected from the total design airflow and the system's fume extraction static pressure, which is the sum of losses across hoods, arms, ducts, fittings, filters and the stack. We include allowance for filter loading so suction does not collapse as filters age. High vacuum fume extraction for on-torch systems uses specialised high-pressure fans or blowers.

In a multi-station plant, not every welder works at the same moment. We apply a realistic usage diversity factor based on your shift pattern and combine it with on-demand dampers, so the central unit is sized for real use rather than the theoretical maximum. This keeps capital and running costs under control.

Recirculation can be considered for particulate fume from low-hazard materials when high-efficiency filtration, filter monitoring and a maintenance plan are in place. Outdoor exhaust is specified for gases, solvent vapours, acid fumes and high-alloy welding fume containing chromium or nickel. Our recommendation is always based on the hazard, never simply on cost.

Every cubic metre of air exhausted outdoors must be replaced. Without planned fume extraction make-up air, the building goes into negative pressure, doors become hard to open, capture performance drops and fumes can be drawn back in. We size fresh air inlets or tempered make-up air units to balance the system.

Grinding, plasma cutting and welding throw hot particles that can travel through ducts and ignite filter media. Spark arrestors and pre-separators slow, cool and trap these particles before they reach the filter house. They are standard on every welding, cutting and grinding fume extraction system we design.

Beyond spark arrestors, we specify flame-retardant filter media where appropriate, inert pre-coating for oily or reactive fume, and safe dust collection bins. Optional temperature sensors, fire dampers and suppression systems can be integrated for high-risk applications. Regular cleaning of the collection hopper is part of every maintenance plan.

Acid and alkali fumes quickly destroy ordinary galvanised or mild steel ducts, causing leaks and structural failure. Compress India fabricates polypropylene (PP), fibre-reinforced plastic (FRP) and stainless steel (SS) ducting to suit the chemical, temperature and fire requirements of each application.

Solvent fume extractors and paint fume extraction systems may handle flammable vapour mixtures. For these duties, we specify flameproof motors and spark-resistant fan construction suitable for the hazardous area classification, along with proper earthing and bonding of ductwork.

Arc sensors detect when welding starts and stops, switching the extractor or opening the station damper automatically. The welder never forgets to turn extraction on, and the system does not run idle during breaks and setup time.

A fume extraction VFD (variable frequency drive) adjusts fan speed to match actual demand and filter condition. Because fan power falls sharply as speed reduces, even a modest speed reduction produces a large energy saving while holding the required suction.

In a demand controlled fume extraction system, motorised dampers open only at active stations. Combined with a pressure sensor and VFD, the central fan delivers exactly the airflow required, making it one of the most effective energy efficient welding fume extraction system designs available.

A fume extractor differential pressure gauge or transmitter shows filter loading in real time. It triggers pulse cleaning only when needed and alerts maintenance teams before rising resistance reduces capture performance.

For larger installations, a PLC controls fans, dampers, pulse cleaning and alarms from one panel. Fume extraction BMS integration brings run status, airflow, filter pressure and fault alarms into your plant's building management or SCADA system for central monitoring.

Source capture keeps toxic fumes, metals and vapours out of the breathing zone, reducing the risk of respiratory disease, metal fume fever, sensitisation and occupational cancer. It shows your workforce that their health is a genuine priority.

A well-designed and documented system supports compliance with Indian occupational safety law, pollution control consent conditions and customer or export audit requirements. Commissioning reports and maintenance records provide clear evidence during inspections.

Less fume deposit means cleaner machines, panels, lights and ceilings, fewer electrical faults and lower housekeeping costs. A visibly clean facility also creates a stronger impression during customer visits.

With the smoke cleared, welders, solderers and machine operators see their work clearly. That translates into better weld quality, fewer rejects and less rework, particularly in precision and electronics work.

Comfortable workers take fewer breaks to escape smoke, need less time off sick and stay more focused. Automatic controls also remove the time lost adjusting equipment or cleaning up after uncontrolled fume.

Where the hazard assessment allows, recirculating high-efficiency filtered air keeps heated or cooled air inside the building. Combined with VFDs and on-demand dampers, this can deliver substantial energy savings compared with exhausting large volumes of conditioned air.

An extraction arm placed too far from the arc captures very little. Operator training, easy-to-move arms, on-torch extraction and enclosures reduce the dependence on correct positioning.

Filters and carbon are consumables that need periodic replacement. Self-cleaning pulse-jet filters, correctly sized filter areas and pre-filters extend their life, and an AMC helps you budget these costs predictably.

Gases, solvent vapours, acid fumes and many carcinogenic fumes must be exhausted outdoors, which increases make-up air and energy needs. We identify these cases early so the cost is built into the plan rather than discovered later.

Fans and high vacuum units produce noise that can be uncomfortable near workstations. Locating the central unit outdoors or in a separate room, using acoustic enclosures and silencers, and running fans at lower VFD speeds keeps noise levels comfortable.

Centralised systems need space for the filter unit, fan and overhead ducting. Our layouts use roof areas, external walls and existing structure wherever possible to keep the production floor clear.

Metal fabrication fume extraction is our core application. We design welding fume extraction systems for fabrication workshops using extraction arms, on-torch guns, downdraft tables and centralised filter units. It is a far more effective solution than relying on an exhaust fan for the welding shop or a general welding ventilation fan alone.

Automotive fume extraction covers robotic welding cells, spot and MIG welding lines, brazing, grinding and paint areas. For service workshops and engine test bays, a vehicle exhaust extraction system with hose reels or rail-mounted systems captures diesel and petrol exhaust at the tailpipe. Portable vehicle exhaust extraction systems are available for smaller workshops.

Shipbuilding welding fume extraction must handle large structures, confined spaces and long welding runs. High vacuum on-torch systems, mobile fume extractors with long hoses and portable ventilation for confined spaces are commonly combined. Foundry fume extraction for melting, pouring and fettling uses canopy hoods and heavy-duty filtration.

Electronics fume extraction protects operators from rosin flux smoke and protects sensitive assemblies from contamination. We supply benchtop units, multi-station solder fume extraction systems and dedicated extraction for selective and wave soldering machines.

From signage and acrylic engraving to industrial fiber laser cutting, we provide laser fume extraction matched to the machine's airflow and the materials processed. Laser cutter fume extractors with carbon stages control odour from plastics, wood and leather.

Plating, anodising, pickling and chromating tanks release acid mists and hexavalent chromium. Lip hoods or push-pull ventilation, PP or FRP ductwork and packed bed scrubbers form the backbone of these systems.

Machine-mounted oil mist collectors capture coolant and oil mist at every CNC lathe, machining centre and grinder. Grinding fume extraction is added where dry grinding produces fine metal dust and fume.

Chemical fume extraction handles solvent vapours from reactors, charging points, dryers and dispensing booths. Solutions combine hoods and snorkels with carbon filtration, scrubbers or oxidisers, with flameproof equipment where required.

We provide laboratory fume extraction through ducted fume hoods, ductless fume cabinets and flexible snorkel arms for bench-level capture. Systems are tested for face velocity and containment during commissioning.

Lead-acid battery manufacturing generates lead fume and dust that must be captured and filtered at high efficiency. Charging rooms need reliable ventilation to prevent hydrogen accumulation, with spark-resistant fans and suitable electrical equipment.

Mixing, vulcanising, moulding and extrusion release fumes and odours that need hood capture and carbon filtration or exhaust to outdoors. Welding and cutting of plastics also benefit from local fume capture.

Jewellery workshops produce soldering and brazing fumes, casting fumes, polishing dust and acid fumes from pickling and refining. Compact benchtop extractors, local exhaust hoods and small acid fume scrubbers create a safer environment in these often compact workspaces.

Nederman is a Swedish industrial air filtration company with a long history in extraction technology. A Nederman fume extractor range typically spans flexible extraction arms, mobile and centralised welding fume systems, and vehicle exhaust extraction for workshops and service bays.

Kemper is a German specialist in welding fume extraction. Kemper fume extraction solutions include mobile extractors, on-torch extraction, centralised filter systems and extraction welding tables, with Kemper exhaust systems widely used in fabrication environments.

Plymovent is a Dutch brand known for extraction arms, mobile and stationary welding fume extractors and centralised filtration. A Plymovent fume extractor is often chosen for welding workshops, and the brand also offers vehicle exhaust extraction for service and emergency vehicle garages.

Lincoln Electric is a global welding equipment manufacturer that also offers welding fume control. Its range covers portable and mobile fume extractors, centralised systems and fume extraction welding guns designed to complement its welding power sources.

ESAB is a well-known welding and cutting brand that offers fume extraction units and fume extraction torches. Its extraction products are commonly paired with ESAB welding and plasma cutting equipment.

Donaldson is a global filtration company whose Torit brand covers dust and fume collectors. A Torit fume extractor or cartridge collector is frequently specified for welding, thermal cutting and other high-load industrial fume collector applications.

BOFA is a UK-based specialist in portable fume extraction for laser, soldering, printing and other industrial processes. A BOFA fume extractor, especially a BOFA laser fume extractor, is a common choice for laser marking and engraving machines.

For soldering and electronics, Weller, Hakko and Metcal offer benchtop and multi-station fume extractors, including compact smoke absorbers such as the Hakko FA-430 series. Purex offers fume extraction for laser and soldering applications. Several Indian manufacturers also produce cost-effective welding fume extractors and filter units suitable for local conditions.

*Brand names are trademarks of their respective owners and are mentioned for reference only.*

We inspect filter condition and pressure drop at every visit and replace cartridges, bags and HEPA filters before they restrict airflow. Using correct-specification fume extractor filters is critical to maintaining capture and filtration efficiency.

Activated carbon has a finite adsorption capacity. We plan carbon replacement based on gas load and operating hours, and check for odour breakthrough so harmful vapours never pass through a saturated bed.

Spark arrestors and pre-separators are cleaned regularly to remove accumulated debris, which would otherwise reduce airflow and create a fire hazard. Collection bins and hoppers are emptied and inspected.

Extraction arm joints, friction brakes, hoses and hood dampers wear with daily use. We adjust and replace these parts so arms move freely and stay exactly where the operator positions them.

Ducts are inspected for dust build-up, damage and leaking joints that reduce suction at the workstations. Cleaning and resealing restore airflow and reduce fire risk in welding and oil mist systems.

For acid fume scrubbers, we check pH, water level, pump performance, spray nozzles, packing condition and chemical dosing. Blowdown and make-up water are adjusted to maintain efficient neutralisation.

Fans and motors are checked for vibration, bearing condition, belt tension, impeller build-up and current draw. Early detection of problems prevents unplanned shutdowns and costly repairs.

Cause: Hood too far from the source, cross-drafts from fans or doors, or insufficient airflow. Solution: Reposition or redesign the hood, add side shields or enclosures, control cross-drafts and rebalance or upgrade the airflow.

Cause: Clogged filters, leaking or blocked ducts, closed or unbalanced dampers, a slipping belt or an undersized fan. Solution: Measure airflow and pressure through the system, clean or replace filters, fix leaks, rebalance dampers and correct the fan duty.

Cause: Filters undersized for the fume load, ineffective pulse cleaning, damp compressed air or sticky, oily fume. Solution: Increase filter area, service the pulse system, dry the compressed air supply and add pre-coating or a suitable pre-filter.

Cause: Carbon bed undersized or overdue for replacement. Solution: Recalculate the carbon quantity for the actual gas load, set a replacement schedule and, for heavy loads, consider exhaust to outdoors or an oxidiser.

Cause: No spark arrestor, arrestor full of debris or grinding sparks drawn directly into the filter. Solution: Install or clean spark arrestors and pre-separators, separate grinding from welding extraction where needed and add fire detection or suppression.

Cause: Mild steel or GI ducts handling corrosive fumes. Solution: Replace with PP, FRP or suitable stainless steel ducting and fans, and add a scrubber to neutralise the fumes at source.

Cause: Worn friction joints, damaged support springs or struts, or an arm unsuitable for its hood weight. Solution: Adjust or replace joint friction assemblies and support components, or upgrade to a heavier-duty arm.

Cause: Fan running at high speed, poor fan selection, vibration or high air velocity at hoods. Solution: Add a VFD, fit silencers or acoustic enclosures, balance the fan impeller, install anti-vibration mounts or relocate the unit.

As production grows, a shop full of portable units becomes hard to manage. We design a central welding fume extraction system that connects all stations to one filter unit, reusing arms and hoods wherever practical, and freeing up valuable floor space.

For long MIG/MAG welds or large structures where arms are hard to position, adding on-torch fume extraction with a high vacuum unit delivers consistent source capture. It can be integrated alongside existing arm-based systems.

If your process has changed or odours are escaping, we can add activated carbon modules, impregnated carbon or a wet scrubber downstream of the existing filter to handle gases and acid fumes.

Retrofitting arc sensing, motorised dampers and a VFD to an existing central system is one of the fastest-payback energy upgrades available. It reduces running hours, fan power and filter wear.

Corroded GI or mild steel ducts on acid fume lines leak fumes and can fail structurally. Our in-house team fabricates and installs replacement PP or FRP ductwork with minimal production downtime.

A small welding fume extractor or portable fume extraction system typically starts around ₹40,000 for a basic unit with a disposable filter and single arm. Industrial welding fume extractors with larger filter areas, longer arms, spark protection and automatic filter cleaning cost more but offer lower running costs and longer filter life.

Centralised system cost is driven primarily by total airflow, which depends on the number of stations and usage diversity. As a rough guide, each extraction arm adds around 800 to 1,200 m³/h to the design airflow. Because the filter unit and fan are shared, the cost per station falls as more stations are connected.

Replacement cartridge and HEPA filters typically cost from a few thousand to a few tens of thousands of rupees each, depending on size and media. Activated carbon is priced by weight and grade, with impregnated carbons costing more. Scrubbers add costs for recirculation pumps, packing, chemical dosing and corrosion-resistant construction.

Ductwork, supports, dampers, erection, electrical work and commissioning often represent a significant share of a centralised project, commonly 20% to 40% of the total. Costs rise with duct length, height of work, material (GI, SS, PP or FRP) and site access constraints.

• Type and hazard level of the fume
• Number of stations and total airflow
• Capture method: arms, on-torch, hoods, downdraft tables or enclosures
• Filtration stages: cartridge, HEPA, carbon, scrubber or oxidiser
• Duct material, length and routing complexity
• Recirculation vs exhaust, including make-up air needs
• Controls: VFD, arc sensing, dampers, PLC and BMS integration
• Fire protection, flameproof equipment and pollution control requirements
• AMC and consumables over the system's life

The lowest quote is rarely the lowest cost. A correctly designed system avoids expensive rework, meets compliance on the first inspection and costs less to run every year.