Dust Collection Systems

Fine and respirable dust, including silica, metal, wood, flour and chemical dust, can cause lung disease, allergies and long-term health damage. Capturing dust at the source keeps exposure below occupational limits and protects your workforce.

Wood, flour, sugar, spice, pharmaceutical, plastic and many metal dusts are combustible. Dust that settles on beams and machines can fuel devastating secondary explosions. Proper combustible dust collection with explosion protection removes the fuel and controls the risk.

State Pollution Control Boards set particulate emission limits for industrial stacks and make them conditions of your Consent to Operate. An efficient dust collector keeps stack emissions within limits, helping you avoid notices, penalties and closure orders.

In pharmaceutical, food, chemical, cement and powder processing, collected dust is often valuable product. Bag filters and cyclones recover it for reuse, reducing raw material losses and improving yield.

Abrasive dust wears bearings, slides, motors and electronics. Dust settling on products causes rejects in painting, packaging and assembly. Effective dust extraction keeps machines running longer and products cleaner.

A well-designed dust extraction system keeps floors, walls and equipment clean, reduces cleaning labour and creates a more professional, pleasant working environment for employees and visiting clients.

Hoods are the most important and most overlooked part of the system. Enclosing hoods, capture hoods, slot hoods and booth-type enclosures are shaped to each machine or transfer point, because a poorly designed hood wastes airflow and lets dust escape.

Dust collection system piping uses long-radius bends, 30–45° branch entries and smooth transitions to reduce pressure loss and abrasion. Blast gates isolate unused branches and balance airflow between pick-up points. Heavier gauge or wear-resistant sections protect areas exposed to abrasive dust.

The housing encloses the filters and separation chamber. It is designed for the system's negative pressure, dust properties, temperature and corrosion conditions, and for explosion protection where the dust is combustible.

Filter bags suit high dust loads, high temperatures and large airflows, while pleated filter cartridges pack more media into a smaller space and suit fine, dry dusts. Filter media selection determines emission levels, pressure drop and filter life.

A compressed air header, diaphragm pulse valves, solenoids, blowpipes and a controller deliver cleaning pulses to each row of filters in turn. A well-tuned pulse-jet system keeps pressure drop low and maximises filter life.

A centrifugal dust collector fan provides the airflow and static pressure the system needs. It is usually placed on the clean-air side so the impeller handles filtered air, reducing wear and imbalance.

Hoppers with steep walls funnel dust to the outlet. A dust collector rotary airlock discharges dust while maintaining the seal, and dust bins, bags or conveyors form the dust disposal system.

The stack discharges clean air at the required height and velocity. Sampling ports and a working platform allow stack emission monitoring as required by the Pollution Control Board.

For combustible dust, explosion vents, flameless vents, isolation valves, spark arrestors and suppression systems protect the collector, the ductwork and the people nearby.

A pulse controller, differential pressure gauge or transmitter, fan starter or VFD, and alarms show how the dust collector is performing and let you act before problems become breakdowns.

A pulse jet baghouse uses rows of fabric filter bags cleaned online by compressed air pulses. It handles high dust loads, large airflows and elevated temperatures, and routinely achieves very low outlet emissions. Baghouse dust collectors are the workhorse of cement, steel, chemical, food and power applications.

These older fabric filter designs clean bags by reversing airflow or mechanically shaking them, usually with the compartment taken offline. They are gentler on bags and suit very large, low-pressure installations, but need more space and cloth area than pulse-jet designs.

A cartridge dust collector uses pleated filter cartridges that pack large media areas into a compact housing. Industrial cartridge dust collectors excel with fine, dry, non-sticky dust from grinding, laser and plasma cutting, welding, powder handling and pharmaceutical processes, and cartridges are quick to change.

A cyclone dust collector spins the airstream so centrifugal force throws heavier particles to the wall, where they drop into a hopper. Cyclones are simple, robust and have no filters, but efficiency falls sharply for fine particles. A multi cyclone dust collector uses many small cyclones in parallel for better efficiency. Cyclones are often used as a cyclone pre-separator ahead of a bag filter.

A wet scrubber dust collector captures particles in water through sprays, venturi throats or wetted surfaces. It handles hot, sticky, moist or explosive dust and can remove some gases at the same time, but produces slurry that needs treatment and disposal.

An electrostatic dust collector charges particles and collects them on plates. ESPs treat very large gas volumes with low pressure drop and are common in power plants, boilers and cement kilns. Performance depends on dust resistivity, and capital cost is high.

A downdraft dust collector pulls air down through a perforated work surface, capturing dust from grinding, sanding, deburring and polishing right at the bench. Integrated units have built-in filters and fans; others connect to a central system.

A portable dust collector or mobile dust extraction unit serves one or two machines and can be moved as layouts change. Options range from a small wall mount dust collector or a 3 HP single-stage unit in a small woodshop to 5 HP two-stage cyclone units and industrial portable cartridge collectors for welding and grinding.

A central dust collection system for a factory connects many machines to one large collector through a ducted network. It keeps noise, dust handling and filter maintenance outside the production area and is usually the most economical option for multiple machines.

A central vacuum system uses a high-vacuum unit and fixed piping with hose points around the plant. Instead of sweeping or compressed-air blowing, which spread dust, operators vacuum floors, machines and beams safely. It complements, rather than replaces, source capture.

Polyester needle felt is the most widely used dust collector filter bag material. It offers good strength and dust release at an economical price, for continuous temperatures up to about 130 °C. It is not suited to hot, moist or alkaline conditions, where it can degrade.

PPS handles continuous temperatures up to about 190 °C and resists acids and moisture, making it common on boiler and dryer exhausts. Aramid (Nomex) handles about 200 °C and resists abrasion well, suiting asphalt, cement and metal processes. Both are used where polyester would fail.

A thin expanded PTFE membrane laminated to the filter surface captures dust on the surface instead of inside the felt. This surface filtration gives very low emissions, easy cake release, lower pressure drop and longer life, especially for fine, sticky or valuable dust.

Woven fibreglass withstands continuous temperatures of about 260 °C and is used in high-temperature applications such as furnaces and kilns. It needs gentle cleaning and careful handling, as the fibres are sensitive to flexing and abrasion.

Anti-static media includes conductive fibres or coatings that drain static charge to earth. It is essential for combustible dust collection, where a static spark from a filter could ignite a dust cloud.

Fluorocarbon treatments help filters shed oily or damp dust, reducing blinding in humid conditions or where oil mist is present. This is particularly useful in Mumbai's humid climate and in machining or food applications.

Nanofibre cartridge filter media carries an ultra-fine fibre layer on a cellulose or synthetic base. Dust is held on the surface and pulses off easily, giving high efficiency on fine particles with low pressure drop and longer filter cartridge life.

A dust explosion needs five elements: combustible dust, oxygen, an ignition source, dispersion into a cloud and confinement. Many common materials, including wood, flour, sugar, starch, spices, pharmaceuticals, plastics, coal, aluminium and magnesium, can explode. Laboratory tests for Kst (explosion severity), Pmax, minimum ignition energy and minimum explosible concentration tell us how dangerous a dust is and what protection is needed.

A dust collector explosion vent is a panel that bursts at a set pressure, releasing the explosion safely before the housing ruptures. Vents must discharge to a safe outdoor area. For collectors located indoors, flameless venting devices quench the flame and dust while still relieving pressure.

An explosion can travel back through the ductwork into the plant. A passive flap valve on the inlet closes under explosion pressure, while active explosion isolation valves or chemical barriers are triggered by detectors. On the outlet side and on dust discharge, rotary airlocks rated for explosion isolation stop flame propagation.

In woodworking, grinding and dryer exhausts, sparks and embers can travel down ducts into the collector. Infrared spark detectors trigger a fine water mist or an abort gate within milliseconds, extinguishing sparks before they reach the filters. A dust collector spark arrestor or drop-out box adds a mechanical layer of protection.

Static electricity is a common ignition source. Ducts, flexible connections, filter cages, hoppers and bins are bonded and earthed, and anti-static filter media is used, so no component can build up a dangerous charge.

The inside of a collector handling combustible dust is typically classified as a hazardous zone. Fans, motors, rotary airlocks, sensors and valves in these areas must be certified for the zone, such as ATEX or IS/IEC 60079 rated equipment, so they cannot become an ignition source. An ATEX dust collector design addresses every one of these components.

NFPA 660, the consolidated Standard for Combustible Dusts and Particulate Solids, now brings together the former NFPA 652, 654, 61, 664, 484 and 655, including the requirement for a documented Dust Hazard Analysis (DHA). NFPA 68 covers explosion venting and NFPA 69 covers explosion prevention and isolation systems. In Europe, the ATEX directives govern equipment and workplace zoning. In India, these internationally recognised standards are widely followed as good engineering practice, and Compress India applies them alongside the Factories Act and Indian electrical standards.

Under the Environment (Protection) Rules, 1986, the general emission standard for particulate matter from industrial stacks is 150 mg/Nm³, unless a stricter limit is prescribed for a specific industry. Many sectors, such as cement, steel and thermal power, have much tighter industry-specific limits, and State Pollution Control Boards, including the Maharashtra Pollution Control Board, can set stricter values in your consent. A properly designed bag filter typically achieves outlet emissions well below these limits.

Most industries need a Consent to Establish before building and a Consent to Operate before starting production, under the Air and Water Acts. The consent specifies the air pollution control devices, stacks and emission limits you must maintain. We design dust collectors to meet these conditions and provide the technical details needed for applications and renewals.

Stacks must have correctly located sampling ports, typically several duct diameters away from bends and disturbances, plus a safe platform and ladder for isokinetic sampling. Periodic monitoring by a recognised laboratory is a common consent condition, and industries in the highly polluting categories identified by CPCB must also install online continuous emission monitoring systems (OCEMS).

Section 14 of the Factories Act, 1948 requires effective measures to prevent inhalation and accumulation of dust, including exhaust appliances as near as possible to the point of origin. Section 37 addresses explosive or inflammable dust. The Second Schedule sets permissible exposure levels for hazardous substances, and state rules such as the Maharashtra Factories Rules add detail.

The ACGIH manual, Industrial Ventilation: A Manual of Recommended Practice for Design, is the global reference for hood design, capture velocities, minimum duct conveying velocities and system balancing. Compress India uses it as the engineering basis for every dust extraction system we design.

We start by understanding the dust itself: particle size distribution, density, shape, abrasiveness, stickiness, moisture, temperature, chemistry and combustibility. These properties decide the collector type, filter media, conveying velocity and explosion protection. Where needed, samples are tested in a laboratory.

Each hood is sized for the airflow needed to capture dust reliably. For an enclosing hood, Q = V × A (capture velocity × open face area). For an exterior hood, the classic relationship is Q = V × (10X² + A), where X is the distance from the hood to the source.

*Worked example:* A 0.1 m² hood capturing at 1.0 m/s from 0.3 m away needs about 1.0 m³/s (3,600 m³/h). Moving the same hood to 0.15 m cuts the requirement to about 0.33 m³/s (1,170 m³/h). Good hood placement is the cheapest energy saving in any dust collector CFM calculation.

Capture velocity is the air speed needed at the source to pull dust into the hood. Conveying velocity is the minimum duct velocity that keeps dust airborne. Typical design values, based on ACGIH guidance, are shown below.

The dust collector air to cloth ratio is the airflow divided by total filter area, and it is the most important sizing parameter for bag and cartridge collectors. A/C ratio = airflow (m³/min) ÷ filter area (m²). Typical pulse-jet bag filters run at about 0.9–1.8 m/min (3–6 ft/min), with lower ratios for fine or difficult dust, while cartridge collectors run lower still.

*Worked example:* 10,000 m³/h (167 m³/min) at 1.2 m/min needs about 139 m² of cloth. Using 160 mm × 3 m bags (about 1.5 m² each), that is roughly 93 bags, rounded up to suit the tube-sheet layout. Undersized cloth area is the most common cause of high pressure drop and short bag life.

Duct sizes are selected branch by branch to hold conveying velocity, then the system is balanced so every hood receives its design airflow. We use long-radius bends, 30–45° branch entries, gradual expansions and minimal flexible hose, and balance by design or with blast gates. Inspection and clean-out doors are provided at key points.

Total static pressure is the sum of hood entry losses, duct and fitting losses, collector and filter pressure drop, and stack losses, plus a margin for filter loading. The dust extraction fan, usually a backward-curved or radial-blade centrifugal fan on the clean side, is selected to deliver the design airflow at that pressure, close to its peak efficiency.

Hopper walls are steep enough, typically 60° or more, for dust to flow freely. Sticky or hygroscopic dust may need steeper walls, vibrators, air pads or hopper heaters. The rotary airlock and dust disposal system are sized for peak discharge, not average, so dust never backs up into the filters.

Most pulse-jet collectors need clean, dry, oil-free compressed air, typically at 5–7 bar. We size the air header, receiver, dryer and drains so pulse pressure stays stable, since wet or oily air is a leading cause of filter blinding.

The stack is sized for good exit velocity and dispersion, with height as prescribed in your consent conditions. Sampling ports, a platform and a ladder are included, and rain protection is designed so it does not deflect the plume back towards the roof.

Returning filtered air to the building can save significant heating or cooling energy. It is only appropriate for non-toxic dust, with a secondary high-efficiency after-filter, continuous leak monitoring and, for combustible dust, suitable explosion isolation. For silica, lead, carcinogenic or highly toxic dust, exhausting to atmosphere is the safe choice.

A dust collector VFD adjusts fan speed to actual demand, for example when machines are idle or blast gates are closed, and holds constant suction as filters load up. Because fan power varies with the cube of speed, even a modest speed reduction produces large savings.

Timer-only cleaning pulses filters whether they need it or not, wasting compressed air and wearing out media. Pulse cleaning triggered by filter differential pressure cleans only when needed, saving air and extending filter life.

Automatic blast gates open only when a machine is running, so the fan serves active pick-up points instead of the whole network. Combined with a VFD, this can reduce airflow and fan energy dramatically in multi-machine plants and woodshops.

PTFE membrane and nanofibre media release dust easily and run at lower pressure drop than conventional felts. Lower resistance means lower fan power, less frequent pulsing and longer filter life.

Fixing leaks, using correctly sized receivers and pulse valves, optimising pulse duration and pressure, and cleaning on demand all cut compressed air use. Since compressed air is one of the most expensive utilities in any plant, these small changes add up quickly.

Filter differential pressure is the single most useful health indicator. A local gauge shows operators the reading at a glance, while a transmitter sends it to the controller, PLC or BMS for trending and alarms.

Pulse controllers fire each valve in sequence. Advanced controllers start and stop cleaning based on differential pressure, run an off-line clean-down cycle after shutdown, and log cleaning activity.

Triboelectric or similar particulate sensors in the outlet duct detect a rise in dust emission the moment a bag or cartridge fails. Some systems can pinpoint which row is leaking, speeding up repairs and protecting compliance.

Dust collector BMS integration or PLC and SCADA connectivity brings fan status, differential pressure, emission readings, airlock status and alarms onto your plant control screens for remote monitoring and data logging.

Interlocks ensure the fan starts before the process, the airlock runs whenever the collector is on, and the system responds safely to spark detection, high temperature, high differential pressure or explosion protection signals.

Dust captured at the source never reaches workers' lungs, floors or machines. The result is a healthier, more comfortable and more productive workplace.

A well-designed bag filter or cartridge collector keeps stack emissions within CPCB and SPCB limits, protecting your Consent to Operate and your reputation with regulators and neighbours.

In pharmaceutical, food, chemical and powder processing, recovered dust goes straight back into production, often paying for a significant part of the system over its life.

Removing combustible dust from the air and from surfaces, combined with proper explosion protection, greatly reduces the risk of fires and dust explosions.

Less abrasive dust in bearings, motors, panels and HVAC equipment means fewer breakdowns, lower maintenance costs and longer machine life.

Clean air reduces contamination, surface defects and rejects in painting, coating, packaging, electronics, food and pharmaceutical production.

Collectors, ducts, fans, explosion protection and controls need investment, and fans and filters cost money to run. Correct sizing avoids paying for capacity you do not need, while under-sizing costs more in the long run.

Pulse-jet cleaning consumes compressed air and fans consume power continuously. VFDs, DP-based cleaning and low pressure-drop media keep these costs under control.

Filter bags and cartridges wear out and must be replaced. Choosing the right media and running at the right air-to-cloth ratio extends life significantly.

Large collectors, hoppers, stacks and ductwork need floor, roof or yard space and structural support. Compact cartridge designs and careful layout help where space is tight.

Combustible dust adds vents, isolation devices, spark detection, certified equipment and safe collector locations to the design, which increases cost but is essential for safety.

Crushers, raw mills, cement mills, packers, silos and transfer points all generate fine, abrasive dust. Pulse-jet bag filters, bin vent dust collectors on silos and cyclone pre-separators keep emissions within the strict limits applied to the cement sector.

Pharmaceutical dust collection protects operators from potent compounds, prevents cross-contamination and recovers valuable product from granulation, blending, compression, coating and dispensing. Cartridge collectors with containment features and high-efficiency after-filters are common.

Flour, sugar, starch, spice and grain dust is both a hygiene issue and a combustible dust hazard. A food dust collection system uses food-grade materials, easy-clean designs and explosion protection. From a large roller flour mill dust collector to a compact atta chakki dust collector, we size systems for every scale.

Saws, planers, routers, sanders and CNC machines produce large volumes of combustible chips and fine dust. A wood dust collection system, often a central cyclone and bag filter with spark detection, keeps furniture factories clean and safe. For a small shop, a compact woodworking dust collector or two-stage cyclone unit can be the right starting point.

Grinding, fettling, shot blasting, sand handling and knock-out generate abrasive and sometimes combustible metal dust. Metal dust collection systems use abrasion-resistant ducts, spark arrestors and cartridge or bag collectors. Grinder dust collectors, including units for tool sharpening machines, capture dust right at the wheel.

Steel plants rely on large dedusting systems for raw material handling, sinter plants, blast furnace cast houses, steel melt shops and rolling mills. High-temperature media, spark arrestors and very large bag filters are typical.

A chemical dust collection system must handle corrosive, hygroscopic or toxic powders during grinding, drying, bagging and conveying. Material selection, sealed designs and sometimes wet scrubbers are used to control both dust and gases.

Compounding, mixing, grinding and pellet handling create fine, often combustible dust. Powder dust collection systems with anti-static media and explosion protection keep these plants clean and safe.

Blow rooms, carding and spinning generate lint and fibre fly that clog machines and create fire risk. Rotary drum filters, bag filters and fibre collection systems remove fibre and return clean air to the conditioned space.

Slitting, cutting, corrugating and trimming release paper dust and trim waste. Dust extraction systems with cyclones and bag filters keep printing and converting lines clean and reduce fire risk.

A mining dust collection system controls silica and mineral dust from crushing, screening, conveying and loading. Silica dust collection requires high-efficiency filtration to protect workers from serious lung disease.

Shredding, granulating and sorting of plastics, paper, metals and e-waste generate mixed, abrasive and sometimes combustible dust. Robust cyclones, bag filters and spark detection handle these demanding conditions.

Donaldson is one of the best-known names in industrial filtration. Its Torit dust collector range includes widely used cartridge collectors for welding, cutting, grinding and powder handling, and Donaldson dust collector filters and cartridges are used as replacements across many collector brands.

Swedish group Nederman is known for source capture solutions such as extraction arms and fume extractors, along with filter units, bag filters and complete industrial air filtration systems for metalworking, woodworking and process industries.

Camfil, a global air filtration specialist, offers cartridge dust collectors and replacement filter cartridges for demanding applications such as thermal cutting, welding, powder and pharmaceutical processes, with a strong focus on combustible dust safety.

Indian engineering company Thermax supplies large air pollution control equipment, including bag filters, electrostatic precipitators and wet scrubbers, for power, cement, steel and process industries.

India also has many capable fabricators of pulse-jet bag filters, cyclones and scrubbers, and filter media makers for bags and cartridges. For small shops, woodworking brands such as JET and Harvey offer compact cyclone and two-stage units. Compress India selects from this full market, so your dust collection system is never limited by a single supplier's range.

We inspect bags and cartridges for wear, holes, abrasion, blinding, chemical attack and seal condition, and check cages and tube-sheet seals for leaks.

Filters are replaced based on differential pressure trends, emission readings and physical condition, with correctly specified media and proper installation to avoid bypass leaks.

Diaphragms, solenoids and pulse valves are tested and serviced. A single failed valve leaves an entire row of filters uncleaned and drives pressure drop up.

We check air pressure, moisture and oil content, dryer performance, drains and leaks, because poor-quality compressed air blinds filters and damages valves.

Hoppers are checked for build-up and bridging, and rotary airlocks for wear, clearance, seal condition and drive health, to keep dust discharge reliable.

Ducts are inspected for abrasion, holes, leaks and settled dust. Worn bends are replaced and settled dust is cleaned out, restoring airflow and reducing fire risk.

We check fan vibration, bearing condition, belt tension, impeller build-up and wear, motor current and alignment, preventing unplanned breakdowns.

Fluorescent powder leak testing and emission monitoring locate leaking bags, cartridges and seals quickly, so they can be fixed before they affect compliance.

Cause: Blocked ducts, open blast gates on idle machines, leaks, high filter pressure drop, a worn fan or machines added without redesign.

Solution: Measure static pressure and airflow, clear blockages, seal leaks, rebalance the system and restore filter and fan performance.

Cause: Undersized cloth area, poor pulse cleaning, low compressed air pressure, moisture or wrong filter media.

Solution: Check pulse valves and air supply, tune cleaning, fix moisture sources and, if needed, upgrade to low pressure-drop media or add filter area.

Cause: Moist, oily or sticky dust, condensation, or wet compressed air sealing the filter surface.

Solution: Insulate or heat the collector, use pre-coating, dry the compressed air and switch to PTFE membrane or oleophobic media.

Cause: Torn or poorly fitted filters, tube-sheet leaks or media unsuitable for fine dust.

Solution: Leak-test and replace failed filters, fix seals, upgrade media and install a broken bag detector.

Cause: Hygroscopic or sticky dust, shallow hopper angles or an undersized or stopped airlock.

Solution: Add hopper vibrators, air pads or heaters, increase airlock capacity and interlock the airlock with the collector.

Cause: Duct velocity below conveying velocity, poor branch entries or abrasive dust hitting short-radius bends.

Solution: Resize ducts, fix fittings, fit wear-resistant bends and maintain correct airflow in every branch.

Cause: Warm, moist gas cooling below its dew point inside the collector, common in Mumbai's humid climate.

Solution: Insulate the housing and ducts, add hopper heaters, preheat before start-up and run a purge cycle after shutdown.

Cause: Worn diaphragms, wet or dirty air, or failed solenoids and controllers.

Solution: Replace diaphragms, clean the air supply and test the controller and every valve.

Cause: Dust bypassing the filters or a fan placed on the dirty-air side, building up on the impeller.

Solution: Clean and rebalance the impeller, fix filter leaks and, where possible, relocate the fan to the clean side.

Cause: Sparks entering ducts, static discharge, hot surfaces or combustible dust without protection.

Solution: Carry out a dust hazard analysis, then add spark detection, grounding, anti-static media, explosion vents and isolation as required.

Cyclones alone rarely meet modern emission limits on fine dust. Adding a pulse-jet bag filter after an existing cyclone, or replacing it, brings stack emissions into compliance while the cyclone continues as a pre-separator.

Switching to PTFE membrane, anti-static, oil-repellent or nanofibre media can cut emissions, lower pressure drop and extend filter life in the same housing.

Older collectors handling combustible dust often lack vents, isolation or spark detection. We carry out a hazard review and retrofit the protection required to bring the system in line with recognised combustible dust standards.

Retrofitting a VFD, a DP-based pulse controller and automatic blast gates reduces power and compressed air consumption with a short payback period.

Abraded bends, leaking joints, worn airlocks and tired fans rob a system of suction. Targeted replacement restores airflow at the hoods and reduces leakage.

When new machines are added, we recalculate the airflow and pressure for the whole system, then extend ducts, add filter area or upgrade the fan so every pick-up point still performs.

The table shows indicative budgets for complete systems, including collector, fan, ductwork, stack, controls and installation.

Cyclones are usually the lowest-cost collectors, with simple units starting from around ₹1 lakh. Small pulse-jet bag filters and cartridge collectors commonly cost about ₹1 lakh to ₹5 lakh for the collector alone, while large, high-temperature or special-material units can run well beyond ₹15 lakh. Cartridge collectors are often cheaper at small airflows; bag filters become more economical at large airflows and high dust loads.

Standard polyester filter bags typically cost around ₹200 to ₹550 each, while PTFE membrane, PPS and fibreglass bags generally range from about ₹450 to ₹1,600 depending on size and construction. Replacement filter cartridges commonly cost around ₹4,000 to ₹5,500 each. Premium media costs more upfront but often lowers total cost through longer life and lower energy use.

Dust collection ductwork uses heavier gauge material than standard HVAC ducts, plus wear-resistant bends where needed, so in a central system with long runs it can be a large share of the total cost. Fan cost depends on airflow, static pressure, material and motor rating, and stack cost on height, diameter and platform requirements.

For combustible dust, explosion vents are the most economical protection. Flameless vents for indoor collectors, active isolation valves, spark detection and certified electrical equipment add further cost, which varies widely with collector size and dust properties.

• Total airflow and number of pick-up points
• Dust properties, including fineness, abrasiveness, stickiness, temperature and combustibility
• Collector type, material of construction and filter media
• Duct length, gauge and complexity
• Explosion protection and hazardous-area requirements
• Emission limits in your consent
• Structural, civil, electrical and compressed air works
• Controls, monitoring and automation

A used dust collector for sale or a DIY dust collector may look cheaper upfront, but if it is not sized for your airflow, dust and emission limits, it usually costs more in poor suction, filter failures and compliance risk. Share your process details or book a site survey for a detailed, itemised quotation.