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Welding fume is not ordinary dust. It is a complex mixture of metal oxides and gases—hexavalent chromium, manganese, nickel, lead oxides—carried on particles small enough to reach deep into the lungs. More than 99.5% of welding fume particles are smaller than 1 micron, which means they slip past the body's natural defenses and settle in the alveoli. The health effects are well documented: respiratory irritation, bronchitis, impaired lung function, and for hexavalent chromium and nickel, a raised cancer risk.
Regulatory pressure keeps building. OSHA sets the permissible exposure limit for hexavalent chromium at just 5 µg/m³ as an 8-hour time-weighted average. The EU's Carcinogens Directive now lists welding fume as a carcinogen, and binding occupational exposure limits are tightening across member states. ISO 21904 defines the minimum air volume flow rates and capture efficiency requirements that extraction devices have to meet.
For global manufacturers the problem comes in two parts. The first is capture: welding fume has to be extracted at the source, before it reaches the welder's breathing zone. The second is filtration: whatever is captured must then be purified enough to allow safe recirculation or compliant exhaust. A system that captures without filtering only relocates the hazard. A system that filters without capturing leaves the welder exposed.
Senotay (senotay.com) has manufactured industrial dust collectors and air filtration equipment in China since 2005 and holds ISO 9001:2015, ISO 14001, ISO 45001, and CE certifications. Its welding fume extraction practice is built around that same principle. The company's HYC Series Welding Fume Purifiers pair flexible extraction arms with multi-stage filtration to reach 99.7% purification efficiency on particles down to 0.3 microns, meeting ISO 21904 and CE requirements.
A welding fume extraction system is made of two subsystems that work together: the capture system (extraction arm and hood) and the purification system (filter unit and fan). Each has its own job, and neither is enough on its own.
The extraction arm is the first line of defense. Its job is to hold the extraction hood close enough to the weld arc that airborne fume is caught before it disperses into the breathing zone. Research has established that the minimum capture velocity at the breathing zone should be 0.5 to 1.0 m/s for extraction to work.
A well-designed extraction arm has to balance four requirements:
Senotay's extraction arms use a universal dust-absorbing arm that swings in any direction to catch fumes at the source. They come in single-arm and dual-arm configurations, fitted with a high-temperature resistant dust suction hose built for the heat that welding throws off. A flame-retardant net at the hood inlet keeps sparks and molten spatter out of the equipment, which makes the unit safer to run.
Captured fumes are drawn into the purifier by negative pressure from the system fan. The filtration sequence usually runs through:
Senotay's HYC Series reaches 99.7% purification efficiency on particles down to 0.3 microns through advanced filtration, with an optional activated carbon layer to take out odors and gases.
Senotay builds the HYC Series welding fume purifiers at its 15,000+ m² ISO-certified facility in Botou, Hebei. The range covers airflow capacities from 1,000 to 7,000 m³/h, in both single-arm and dual-arm configurations.
Senotay welding fume purifiers cover the full spread of welding and thermal cutting operations:
Senotay's welding fume extraction portfolio is built around three product categories:
Wall- or column-mounted extraction arms paired with stationary purifier units. These suit permanent welding stations that run continuously. Offered in single-arm (HYC-1500/3000) and dual-arm (HYC-Dual1000/Dual3000) configurations.
Portable units with the extraction arm and filtration built in, mounted on casters so they can move as flexible deployment shifts from one work area to the next. The HYC-Mobility delivers 1,500 m³/h at just 35 kg, and its 220V single-phase operation makes it plug-and-play.
High-capacity systems built for heavy-duty welding operations, delivering 7,000 m³/h at 99.97% filtration efficiency. They are designed for multi-station welding bays and high-volume fabrication shops.
Senotay welding fume purifiers are engineered against the strictest international standards:
Introduced in October 2020, the ISO 21904 standard set minimum air volume flow rate requirements for extraction devices and laid out testing protocols for separation efficiency. Senotay systems are designed to meet those requirements, with airflow capacities from 1,000 to 7,000 m³/h and filtration efficiency up to 99.97%.
Senotay builds welding fume purifiers in-house, so factory-direct pricing typically comes in 30–50% below Western suppliers.
Senotay holds ISO 9001:2015, ISO 14001, ISO 45001, and CE certifications, and every unit is built to international quality and safety standards, with pre-shipment testing on the record.
Senotay's welding fume portfolio runs from portable units (HYC-Mobility) through single-arm systems (HYC-1500/3000) and dual-arm systems (HYC-Dual1000/Dual3000) up to high-capacity industrial systems (HYC-5000 to HYC-IndustrialPro), so there is a fit for every application.
Worldwide dealer network keeps delivery fast and support local
Lifetime technical consultation
Replacement cartridges and filters available
Remote diagnostics and troubleshooting
Senotay has been manufacturing industrial dust collectors and air filtration equipment since 2005, from its 15,000+ m² facility in Botou, Hebei. The company serves 30+ industries across several continents, with 99.7% quality acceptance and a proven record in welding, metal fabrication, automotive, and construction work.
Q: What is a welding fume extraction arm?
A welding fume extraction arm is an articulated, flexible duct that holds an extraction hood close to the weld arc, catching fumes at the source before it reaches the welder's breathing zone. Senotay arms offer 360° rotation, heat-resistant hoses, and flame-retardant spark arrestance.
Q: What is a welding fume purifier?
A welding fume purifier is a filtration unit that traps and removes hazardous particles and gases from welding fumes. Senotay purifiers run multi-stage filtration—pre-filter, cartridge, optional HEPA, and optional activated carbon—and reach 99.7% efficiency on particles as small as 0.3 microns.
Q: What filtration efficiency can Senotay achieve?
HYC Series purifiers reach >95% efficiency on standard models and 99.97% efficiency on the HYC-5000 and above, capturing particles ≥0.3 µm.
Q: What airflow capacity is needed for welding fume extraction?
ISO 21904 sets minimum air volume flow rates according to extraction arm diameter and configuration. Senotay recommends 1,000–1,500 m³/h for light welding, 2,000–3,000 m³/h for medium-duty MIG/MAG, and 5,000–7,000 m³/h for heavy fabrication and plasma cutting.
Q: What certifications does Senotay hold?
Senotay holds ISO 9001:2015, ISO 14001, ISO 45001, and CE certifications, and its systems are designed to comply with ISO 21904 and EN ISO 15012.
Q: Can Senotay customize welding fume extraction for specific applications?
Yes. Senotay supplies single-arm and dual-arm configurations, portable and stationary units, and optional HEPA and activated carbon filtration. Each system is engineered around the welding process, fume volume, and workspace layout it will actually face.
Q: What is the difference between mobile and stationary welding fume extraction?
Mobile units (HYC-Mobility) are portable and caster-mounted, which suits changing work locations, confined spaces, and maintenance work. Stationary systems (HYC-3000 to HYC-IndustrialPro) are built for permanent welding stations running continuously.
Welding fume extraction is not optional. It is a regulatory requirement, a worker health imperative, and an investment in productivity. Only the combination of extraction arms that capture fume at the source and purifiers that filter down to sub-micron levels actually solves the problem. A system that does one without the other just moves the hazard somewhere else.
Senotay brings two decades of manufacturing experience to this technology. From its ISO-certified facility in Botou, China, the company supplies welding fume extraction arms and purifiers that combine factory-direct pricing, certified quality (ISO 9001, ISO 14001, ISO 45001, CE), 99.7% filtration efficiency, and ISO 21904 compliance. With airflow capacities from 1,000 to 7,000 m³/h and configurations covering portable, single-arm, dual-arm, and industrial systems, every Senotay system is built around the process conditions it will actually meet, because in welding fume control a single standard design rarely fits every shop.
Ready to discuss your welding fume extraction requirements?
Visit senotay.com or talk to Senotay's engineering team about a solution built around your welding process and emission targets.