Used Central Extraction System Adlolph & Co for sale (65,477)

Year of construction: 2023, condition: used, functionality: fully functional, machine/vehicle number: SN-22-1409, For sale is a high-quality extraction system from the brand Absaugwerk, year of manufacture 2023, specifically designed for the collection and filtration of welding fume (e.g. aluminum dust). The system meets the latest technical standards and includes: Equipment: • Extraction table with downward extraction • Integrated wet separator in line with the latest safety standards • Suitable for professional welding applications • ATEX-compliant (Zone 2, Ex II 3G) • Power: 4.0 kW / 400 V / 50 Hz • Condition: almost as new, fully functional Collection by buyer. Assistance with dismantling/transport can be arranged if required. If you are interested or have any questions, please feel free to send me a message. On-site inspection by appointment is possible. More metalworking machines available, such as bench drill presses, press brakes, column drill presses, eccentric presses, heavy-duty racking, welding tables, MIG/MAG welding units, compressors, etc. – please check my other listings. Domestic price net plus VAT Dcjdpex Da Tiofx Apbon or Net export price Pick-up only – dismantling and transport by buyer or by arrangement. If you are interested or have any questions, please feel free to send me a message. More photos and technical details available on request. All information provided without guarantee or warranty. Subject to errors and prior sale. For further questions, please call. Nous parlons Francais / Мы говорим по русски We speak English / Noi vorbim româneste Viber / WhatsApp / Skype For an additional fee, we handle all customs and registration formalities. We transfer vehicles to the port for an extra charge.

Condition: ready for operation (used), Year of construction: 1997, machine/vehicle number: RS 110-6-2 TF, functionality: fully functional, filter area: 660 m², total height: 10,400 mm, total length: 9,200 mm, total width: 2,500 mm, overall weight: 9,000 kg, Equipment: documentation/manual, Industrial Extraction System Venti Oelde, Spülluftfilter RS 110-6-2 TF, High-Performance System Airflow approx. 87,500 m³/h, 660 m² filtration area, year of manufacture 1997, incl. 3 high-performance fans, incl. ductwork, incl. air recirculation for approx. 70,000 m³/h, excl. spark extinguishing system. For sale is a powerful industrial extraction system by Venti Oelde, designed for an airflow of approx. 87,500 m³/h. The system has been in continuous operation and is suitable for use in larger industrial applications (e.g., wood processing, furniture manufacturing, operations with high chip and dust volumes). 👉 This is a complete central extraction system, not a standalone unit! Key Technical Data (excerpt) - Airflow: approx. 87,500 m³/h - Configuration: Central extraction - Year of manufacture: approx. 1997 - Application area: Industry / continuous duty Dcsdpfxoywflae Apbsn - Robust steel construction - Built for heavy-duty continuous operation Scope of Delivery - Filtration system - Fans - Ductwork - Air recirculation unit - Steel frame / support structure Condition - System was operational until recently - Used, age-related, but solid industrial build quality - Inspection is explicitly encouraged Special Features - Very high air capacity – ideal for large-scale production facilities - Immediately available – no long lead times as with new systems - Heavy-duty construction – durable industrial technology - Attractive alternative to costly new installations - Dismantling support can be organized at extra cost!!!! The offered machine is sold as a used system. Sale is conducted with exclusion of any liability for material defects. The machine is sold as inspected and excluding any warranties. The seller accepts no guarantee regarding the functionality, performance, or suitability for any particular purpose. Disclaimer All liability for material defects is excluded. This does not apply to damages arising from injury to life, body, or health, or in cases of intentional or grossly negligent conduct by the seller. Dismantling and Transport Dismantling of the system is to be undertaken by the buyer at their own risk and expense. The buyer is responsible for all costs and risks associated with dismantling, loading, and transport. Transfer of Risk The risk passes to the buyer at the latest upon commencement of dismantling and/or loading. Other Information No liability is accepted for hidden defects. All information regarding the machine (e.g., year of manufacture, operating hours, technical data) is given to the best of our knowledge but without guarantee.

Condition: used, Year of construction: 2017, power: 11 kW (14.96 HP), input voltage: 400 V, volume flow: 6,927 m³/h, overall weight: 1,080 kg, Equipment: CE marking, We are offering this used Höcker Polytechnik Vacumobil 350 mobile dust extraction system, model Vacumobil JT350-L, manufactured in 2017. Dodpfx Apeznulzebocn If you have any questions or require further information, please do not hesitate to send us a message or call us.

Condition: used, Year of construction: 2017, Blast Cabinet with Extraction System Blast Cabinet: Manufacturer: SGT Strahlmaschinen AG Model: SX-100 / DK / 4P Extraction System: Manufacturer: Gläsner Plant No.: 5V 3028 055 Voltage: 400 V Frequency: 50 Hz Power: 2.2 kW The blast cabinet is sold together with the extraction system. Purchasing individual components separately is not possible. Dcsdoyddufspfx Apbsn Inspection is available by appointment.

Condition: used, functionality: fully functional, Central ventilation unit HELIOS Air 1 XH1500 with highly efficient heat recovery and integrated air reheating. For controlled supply and exhaust ventilation of larger residential, commercial, or industrial areas. 2 EC fans at 0.5 kW each, 1,490 m³/h at 350 Pa. Electric preheating coil 3.9 kW, electronic reheating coil 3.8 kW, cross-flow heat exchanger, integrated filter box. Includes HELIOS Universal control unit ECO and 2 HELIOS duct sensors TFK – a functionally complete system. Technical data: - Air flow rate 1,490 m³/h at 350 Pa; fans 2 x 0.5 kW EC Dedpfx Aozmaqaopbecn - Preheating coil 3.9 kW / Reheating coil 3.8 kW; cross-flow heat exchanger; integrated filter box - Control system: HELIOS Universal control unit ECO and 2 duct sensors TFK included - From a commercial environment, sold in its current condition without warranty. More units and equipment are continuously being offered for sale as part of a laboratory and pilot plant liquidation – inquiries are welcome. Sold on behalf of a customer via the Köck auction house. Located in eastern Austria, exact address available upon request. Collection/dismantling by the buyer.

Condition: excellent (used), Year of construction: 2023, machine/vehicle number: 2804221, functionality: fully functional, input frequency: 50 Hz, type of input current: three-phase, volume flow: 18,000 m³/h, suction capacity: 18,000 m³/h, filter area: 60.6 m², actuation type: electric, The EK-24 unit is a dust and chip extraction and filtration system for wood and wood-based material processing. The unit is manufactured by the Polish company Euro-Komplex, which specializes in the design, production, and installation of comprehensive dust extraction systems used in various industries, particularly in woodworking and furniture factories. The filter effectively removes contaminants from multiple machines simultaneously, such as circular saws, panel saws, four-sided planers, veneer coating machines, CNC machines, milling plotters, and sanders. Technical specifications: • Airflow: 18,000 m³/h • Filtration area: 60.6 m² • Number of filters: 48 pcs / 2000mm / 200mm Dcsdpfezba E Isx Apbjn • Electrovibrator: 0.09 kW x 2 • Control cabinet with frequency converter • WTK fan • Air lock • Dry fire tube The filter's robust and solid construction is made of hot-dip galvanized or powder-coated steel with a thickness of 2mm, and the inlet tunnel and reinforcements are made of 3mm steel. The structural elements are fastened with 8.8 screws with Teflon inserts. It is worth noting that the filter basket used is uniform and smooth, without welded elements, which facilitates airflow with waste fractions without depositing them on the basket walls. The EK-24 is equipped with an 0.09 kW electrovibrator in an ATEX system, used to clean the filter bags made of antistatic and waterproof material with a weight of 350g/m² and an air permeability of 240l/dm²/min. The cleaning system is fully automated and operates in appropriately selected time cycles adapted to the type of dust being extracted. Thanks to the use of an air return lock (summer/winter flap), in winter, the cleaned and filtered air returns to the production hall, which has a very beneficial effect on maintaining the appropriate temperature and provides measurable financial benefits. The WTK fans used in the EK-24 have self-cleaning impellers and a reinforced design, which guarantees stable operation for a long time. Electrical control is carried out using a control unit equipped with protection and a time control system for the electrovibrator and the fan motor. The control cabinet is equipped with a frequency converter, which enables the adjustment of the fan motor speed and provides very precise control. The air lock is used to separate the filter zone from the external zone. It blocks the airflow, allowing only wood chips to pass through, so they fall freely into the bag without an air blast. The air lock is equipped with a system that mitigates the impact of the impeller in case a large solid object enters the unit. It is equipped with a dry fire tube mounted on the filter, used to quickly supply water or extinguishing agent to the closed filter chamber using internal sprinklers. The installation is equipped with a fire brigade connection necessary to connect fire department equipment or a hose directly from a fire hydrant. The filter also has a pressure relief device, which lowers the pressure in the event of an explosion. It is designed to relieve an explosion developing inside a protected device, such as hoppers, silos, separators, filters, sorters, etc., where an explosion hazard exists. By releasing the explosion into the environment, the explosion pressure is reduced to a value below the allowable pressure resistance of the protected device.

Condition: excellent (used), Year of construction: 2017, No. 1 rectangular filter station with a mechanical shaker cleaning system, operating under positive pressure, with the following dimensions: Width: 3,400 mm Length: 6,600 mm Height: 7,500 mm Filtering surface: 396 m2 Dcjdpfxoz Hz Htj Apbjn Manufactured from galvanized steel sheet, complete with: - No. 160 polyester satin filter bags, 350 g/m², Ø250 × 3,000 mm, open at both ends; - No. 320 galvanized quick-release clamps, Ø250 mm; - No. 2 filter support frames; - No. 1 electric motor, 2.2 kW – 6 pole; - No. 1 external filter housing enclosure; - No. 1 access door to the filter compartment; - No. 1 vertical access ladder to the filter compartment; - No. 2 clean-air discharge stacks complete with air sampling connections; - No. 6 braced support legs; - No. 1 dust collection hopper complete with inspection hatch; - No. 1 screw conveyor, complete with 2.2 kW – 4-pole gear motor, steel shaft and flight, bearings, and supports; - No. 1 rotary airlock valve, complete with 1.5 kW – 4-pole gear motor, steel shaft, and rubber blades; - No. 1 high-level indicator; - No. 2 transparent PVC inspection windows; - No. 1 Ø200 mm tee connection complete with anti-clogging micron vent; - New galvanized bolts, nuts, and sealing gaskets for future reassembly.

Condition: used, Year of construction: 1999, functionality: fully functional, power: 3 kW (4.08 HP), input voltage: 400 V, volume flow: 2,780 m³/h, AL-KO Mobil-Jet 200, 3 kW, 400 V, year of manufacture 1999, 2,780 m³/h, connection diameter 200 mm, functional/can be demonstrated. Collection and loading will be carried out by the buyer. Piping can be included upon request. Dsdozx Swijpfx Apbjcn Price: EUR 1,900.00 net, ex works.

Condition: like new (used), Year of construction: 2025, functionality: fully functional, power: 7.5 kW (10.20 HP), input voltage: 400 V, input current: 13 A, input frequency: 50 Hz, type of input current: three-phase, volume flow: 5,089 m³/h, intake manifold diameter: 300 mm, actuation type: electric, overall weight: 952 kg, We are offering this like-new AL-KO POWER UNIT 300 P mobile dust extraction unit, manufactured in 2025, without warranty or the possibility of return. The unit is in perfect, fully functional condition. You are welcome to inspect the unit at our premises. The sale will be processed with an invoice. Type: POWER UNIT 300 P Article number: 195 677 03 Manufacturer's number: 2433409659/01 Dsdez E H Duopfx Apbocn Year of manufacture: 2025 Intake nozzle: 300 mm Rated speed: 2900 1/min Rated volume flow: 5.089 m³/h Rated current: 13.7 A Vacuum at rated volume flow: 2.587 Pa Protection class: IP 54 Motor power: 7.5 kW Weight: 952 kg Voltage/current type/frequency: 400/3~/50 V/Hz Compressed air connection: 4.0 bar Fuse rating: 25 A Filter: 85101202 Kat M If you have any questions or require further information, please send us a message or call us.

Condition: used, Year of construction: 2025, Nominal volumetric flow rate: 1,447 m³/h Power: 2.2 kW Negative pressure: 2,200 Pa Filter area: 9.5 m² Diameter: 160 mm Dsdpfoz E Sz Eex Apbocn Dimensions: 1665 x 900 x 1980 mm Weight: 306 kg Storage location: Nattheim

Condition: excellent (used), Year of construction: 2001, functionality: fully functional, power: 0.14 kW (0.19 HP), input voltage: 230 V, type of input current: AC, volume flow: 1,890 m³/h, filter area: 7.9 m², noise level: 65 dB, actuation type: electric, total height: 575 mm, total length: 600 mm, total width: 590 mm, overall weight: 55 kg, Equipment: CE marking, documentation/manual, LTA electrostatic extraction system 2 units, left and right intake The intake nozzle can be screwed on as needed; currently, there are none, as it was previously mounted directly on the housing wall. In very good, fully functional condition; naturally, it has been completely cleaned. Dcedpfx Aezqttcspben Available for immediate delivery.

Condition: used, Year of construction: 2011, Mobile dust extraction system, Schuko connection, diameter 160 mm Dimensions L/W/H in mm: 2045x870x2125 Dedpezmag Isfx Apbecn Power: 2.2 kW

Condition: good (used), functionality: fully functional, Mill with extraction system, sound-attenuating enclosure Dcodjvzzx Espfx Apbon Power: 4 kW All functions tested and fully operational!

Condition: good (used), Holtrop & Jansman MSO-250 Djdpozzmadofx Apbjcn Dust extraction system with negative pressure Connection diameter: 250 mm Capacity: approx. 4,000 m³/h at 2,000 Pa Motor power: 4 kW Fire protection flap Filter hoses: already replaced with an antistatic version.

Condition: used, Year of construction: 2008, 12 motors of 15kW Disassembled into 6 parts: Part 1: 2x Upper part with motors 4000kg Part 2: 2x Intermediate part with filter bags 4000kg Dodpfx Aowiwpzopbjcn Part 3: 2x Lower part with legs 2000kg Remainder: Return lines and 1x switch cabinet. Dismantling takes place on Extraction is loaded onto the truck. - Year: 2008 - Documentation available: No - CE marking present: Yes - CE certificate present: No - Serial number: 8011510B - Suitable for material: Wood dust - Type of extraction: Underpressure installation - Capacity [m³/h]: 80000 - Nominal airflow [m/s]: 22 - Negative pressure [Pa]: 3200 - Main fan [pcs]: 12 - Main fan power [kW]: 15.0 - Number of filter bags [pcs]: 384 - Filter length [mm]: 2500 - Filter diameter [mm]: 230 - Filter surface area [m²]: 694 - Options: Fire suppression system, Control cabinet Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Yorick Diebels

Condition: like new (used), functionality: fully functional, Exhibition machine For sale is our Felder RL-125 clean air extraction unit from our showroom, with a maximum air flow rate of 1900 m³/h. The extraction unit is in like-new condition and has been inspected and refurbished by our qualified personnel. Technical data: - Clean air extraction unit RL-125 - Extraction connection 125 mm - Manual filter cleaning - Max. air flow rate 1,900 m³/h - Chip container with a capacity of 200 liters - 3 kW (4 hp) motor / 400 volts Dsdpfozrnqlsx Apbscn - H3 certified! The clean air unit is located in A-8561 Söding and can be inspected at any time during our opening hours. Subject to prior sale! Related terms: extraction, extraction unit, clean air unit, clean air, RL Reference: R-D1618

Condition: reconditioned (used), Year of construction: 1994, machine/vehicle number: 941108, functionality: fully functional, total height: 2,520 mm, total length: 2,580 mm, total width: 1,000 mm, Compact dust extraction system with 3 chip collection bags – WITHOUT fan Nominal air flow rate: 5000 m³/h with existing fan – up to 7500 m³/h possible Filter area: 37.5 m² Filtration technology: AL-KO Opti-Jet system consisting of compressed air cleaning (sequence-controlled) and surface filtration Chip collection capacity: 8 solenoid valves Suction nozzle: DN 355 mm Compressed air connection: 1", compressed air, water and oil-free Dcodpfx Apszqan Hjbon Minimum compressed air consumption 8.5 bar: 1140 NL/cleaning cycle Operating pressure: maximum 8.5 bar Fire extinguisher connection: 1 x 1 1/2" Dimensions WxD approx: 2572 x 981 mm Height approx: 2520 mm Weight without filter approx: 457 kg JET cleaning: A pressure surge on the inside of the filter achieves effective cleaning of the filter hoses on the outside. Easy maintenance: large access doors facilitate filter maintenance, additional inspection covers High-quality filter material: oil and water-repellent surface coating of the filter, for problematic dusts (paint sanding dust, wet dust), filter washable Uniform bag filling: infinitely adjustable distribution flaps enable uniform bag filling Suitable fan: see item no. 7458 D=250 mm - 5000 m³/h extraction capacity With a fan D=350 mm, up to 7500 m³/h extraction capacity is possible!!!

Condition: used, Year of construction: 1998, machine/vehicle number: 980919, functionality: fully functional, power: 5.5 kW (7.48 HP), input voltage: 400 V, input frequency: 50 Hz, volume flow: 3,450 m³/h, intake vacuum (max.): 3,550 mbar, suction capacity: 3,450 m³/h, intake manifold diameter: 250 mm, filter area: 23 m², total height: 2,959 mm, total length: 2,500 mm, total width: 1,238 mm, overall weight: 750 kg, Used clean air system for two to three woodworking machines operating simultaneously. Suitable for outdoor installation. New filters are included. The control system is equipped with a speed control function via a frequency inverter. Dcjdpfx Ajzukulepbjn

Condition: used, Year of construction: 2016, operating hours: 16,859 h, type of input current: three-phase, suction capacity: 5,000 m³/h, filter area: 80 m², NOVUS AirTower Filter Ventilation Tower, 5,000 m³/h. Industrial filter ventilation for welding halls — designed for a variety of technological processes in production plants, primarily for metalworking. Top-mounted air intake and draft-free air discharge at floor level — directly to workstations. Layered filter ventilation principle; the unit does not require ductwork installation. Cartridge filter elements — self-cleaning via compressed air pulses during operation. Filter cleaning by differential pressure — no compressed air loss. Layered ventilation principle: contaminated air is drawn in from above, filtered, and then released at floor level as clean, breathable air without causing drafts, at a velocity below 1.2 m/s, precisely where workers breathe. Covers a broad 270-degree area. The tower operates on the layered ventilation principle, recommended by trade associations and considered the most effective form of air circulation. Year of manufacture: 2016 Operating hours: 16,859 h Specifications: - 3.9 kW EC fan - Capacity: 5,000 m³/h - Filter surface area: 80 m² - Filter cartridges: 4 pcs - Additional high-efficiency final filter (F9 filtration class) provides increased air cleaning performance and additional protection for the fan in case of main filter failure. - 100 l dust collection drawer - Very quiet operation: 75 dB(A) - Filtration efficiency: > 99.6% Dcedpfx Aeyq Nl Nopbjn - Stock No.: 1109

Condition: excellent (used), Year of construction: 2024, For sale is a Felder RL-160 clean air extraction unit with a maximum airflow rate of 3200 m³/h. The extraction unit is in very good condition and has been inspected and refurbished by our qualified technicians. (Fully functional) Technical specifications: - Max. airflow rate 3200 m³/h - Filter area 10 m² - Extraction connection diameter 160 mm - Manual filter cleaning - H3 dust-tested - Year of manufacture 2024 - Machine no. 31.11.049.24 The clean air unit is located in A-5431 Kuchl and can be inspected at any time during our opening hours. Subject to prior sale! Related terms: Clean air unit, extraction unit, extraction, clean air, RL Dsdpfx Apszy U Tisbocn Reference: R-A0117

Condition: like new (used), Year of construction: 2024, functionality: fully functional, operating hours: 2 h, power: 15 kW (20.39 HP), input voltage: 400 V, input frequency: 50 Hz, type of input current: three-phase, volume flow: 20,000 m³/h, filter area: 295 m², noise level: 75 dB, actuation type: electric, total height: 3,643 mm, total length: 2,066 mm, total width: 1,756 mm, overall weight: 1,590 kg, year of last overhaul: 2024, Equipment: CE marking, documentation/manual, NOVUS Airtower FT 20,000 EC – like new – only 2 operating hours For sale is a NOVUS Airtower FT 20,000 for extracting welding fumes in industrial halls. The unit was used exclusively for testing purposes and currently has only 2 operating hours. The Airtower has been technically inspected and is in perfect working order. All features are functioning correctly. There are no damages. Equipment: * NOVUS Airtower FT 20,000 * ECblue efficiency package * NOVUS particle sensor * NOVUS lighting package * Timer * Automatic filter cleaning * 3 filter stages * Total filter area 295 m² * Dust container 200 liters * Plug & Play, no piping required * Forklift attachments and crane eyes Technical data: * Airflow rate: approx. 20,000 m³/h * Motor power: 15 kW / 400 V / 50 Hz * Dimensions: approx. 2,066 x 1,756 x 3,643 mm * Weight: approx. 1,590 kg * Sound pressure level: < 75 dB(A) Dsdpfx Apjzfx Rijbscn A guard was removed during the testing phase and has already been reordered. This will be professionally installed before delivery. Price: €27,900 net, negotiable, plus VAT. Sale exclusively to businesses. Location: 48691 Vreden. Inspection possible by appointment. Loading can be arranged on-site.

Condition: excellent (used), Year of construction: 2009, Equipment: CE marking, Small mixing system for 3 gases with fluctuating withdrawal rates, mixture withdrawal possible from zero up to maximum capacity, independent of pressure fluctuations, rapid cycling withdrawal possible, lockable viewing panel for protection against accidental adjustment, splash-proof stainless steel housing. Technical data: Mixing range: Oxygen: (0-25% vol.) Carbon dioxide: (0-10% vol.) Argon: (0-100% vol.) Inlet pressure bar: min 6 bar - max 20 bar dynamic Outlet pressure bar: 3 bar Measuring pressure: 6 bar Dcsdpjzrfmdsfx Apbsn Volume flow: 0 - 173 NI/min Scope of supply: without container

Condition: good (used), Dust extraction fan, extraction, dust blower, extraction system, dust blower, dust extraction device, separator, welding fume filter, welding fume extraction, flue gas extraction fan, filter system Cartridge dust extraction system -Manufacturer: TEKA, filter system for extraction system including control unit with frequency converter -Type: ZPF9 Djdpezukp Aefx Apbocn -Cartridge filter: see photos -Inlet/Outlet: Ø640 mm / Ø640 mm -Extraction capacity: up to 20,000 m³/h -Note: A filter unit only, without a suction fan, can be supplied for an additional charge (ID38772) -Dimensions: 1840/1475/H2670 mm -Weight: 689 kg

Condition: excellent (used), Year of construction: 2020, machine/vehicle number: 020020, functionality: fully functional, input voltage: 400 V, input frequency: 50 Hz, type of input current: three-phase, suction capacity: 4,500 m³/h, total height: 2,000 mm, total length: 2,000 mm, total width: 1,000 mm, overall weight: 280 kg, For sale is a fully functional industrial dust extraction unit from HOLZING / MÜNALSAN, model RLA 125 VIBER. The unit is used, in good technical condition, and fully operational. It is ready for further use. The dust extraction unit is designed for industrial applications, including the extraction of dust, wood chips, and other contaminants generated during material processing. Technical data: Manufacturer: KMA Maszyny / MÜNALSAN Type: RLA 125 VIBER Year of manufacture: 2020 Serial number: 020020 Motor power: 3 kW Power supply: 400 V Frequency: 50 Hz Maximum capacity: approx. 4500 m³/h Unit weight: approx. 280 kg Solid, metal construction Installation with pipes and fittings as shown in the photos The unit has been inspected and is functioning correctly. The visual condition is as shown in the photos – normal signs of use, dirt, and wear are visible, but they do not affect the operation. We are selling the exact unit shown in the photos. It is possible to inspect the unit on-site before purchase. The stated price is indicative and does not constitute a binding offer. The final selling price will be determined individually after inspection and verification of the unit's technical condition. Dcsdjz D Sm Ejpfx Apbon Due to its size and weight, personal collection is preferred. Transportation is also possible after prior arrangement.

Condition: good (used), Year of construction: 2017, machine/vehicle number: 17002702, Offer 25276 Extraction Filter System / Stationary Filter Unit with Wet Separator Technical Data: Dcjdpox Upd Uefx Apbsn - suitable for moist, sticky dusts, metallic grinding - with heavy spark generation - single and multi-station extraction - volumetric flow approx. 5,150 m³/h - water capacity 390 l - drive power 400 V / 7.5 kW - required space W 1250 x H 3650 x D 1100 mm - weight approx. 550 kg