Used Blower for sale (1,064)

Condition: new, Year of construction: 2026, functionality: fully functional, Adjustable extraction for lathes with a wheeled base, ensuring effective extraction of dust and chips. The set includes a 56-liter chip bag and a 230 x 125 mm connector. The perfect choice for professional turners and hobbyists, ensuring a clean and safe workshop. Product characteristics: The sawdust extractor for wood lathes is a reliable tool that guarantees effective extraction of dust and chips when processing materials. Its main feature is the adjustable nozzle, which allows you to precisely adjust the suction to specific needs and working conditions. This allows you to effectively keep the area around the lathe clean, eliminating potential health and safety hazards. Hodpsvu Aprjfx Ag Isfg The extractor is equipped with a solid base with wheels, which allows it to be easily moved and placed in different places in the workshop. Regardless of whether the machine is used in a fixed location or requires frequent relocation, the extractor will certainly meet your expectations in terms of mobility and comfort of use. The scope of delivery of the extractor includes a chip bag with a diameter of 380 mm and a length of 530 mm, with a capacity of 56 liters. Thanks to the large capacity of the bag, you can easily work for a long time without having to empty it frequently. Additionally, the set includes an extraction stub with dimensions of 230 mm (length) by 125 mm (height), which ensures reliable and effective connection of the extraction device to the lathe. No matter whether you are a professional turner or a hobbyist, a lathe extraction device with an adjustable spigot and a mobile base will certainly help you keep your workshop clean and ensure safe working conditions. This extract will also work: Planers Planners Thickness gauges Milling machines Banding machines Format saws Technical data ENGINE POWER 0.75kW TENSION 230V / 50Hz WASTE BAG CAPACITY 56 years old SUCCATION PERFORMANCE 1000 m3/h SUCTION PIPE DIAMETER 100 mm FAN DIAMETER 230 mm VACUUM 1030 Pa SOUND PRESSURE LEVEL

Condition: new, functionality: fully functional, Year of construction: 2026, The FM300SN transport fan is a technologically advanced unit designed for extracting sawdust, wood chips, and wood dust in industrial environments. With a 2.2 kW motor and an airflow capacity of 3900 m³/h, the unit performs exceptionally well as a sawdust blower in dust extraction systems, ensuring effective air filtration and purification directly at the source of contamination. Its reliability, high performance, and compatibility with various woodworking machines make it an ideal choice for professional wood processing facilities. Key Advantages 2.2 kW motor – designed for intensive continuous operation High extraction capacity of 3900 m³/h – efficient removal of sawdust, chips, and dust Impeller speed 2950 rpm – optimal airflow with stable operation Hsdpfxovu Amks Ag Iofg Universal suction ports – 1 × 150 mm and 3 × 100 mm for connecting multiple machines simultaneously Steel construction – resistant to mechanical damage and adapted for industrial conditions Design and Technology The FM300SN is based on a welded construction made of thick, powder-coated steel, ensuring resistance to impacts, vibration, and heavy-duty use. The aluminum impeller is mounted directly on the motor shaft, providing high efficiency and minimal energy loss. The fan is designed for three-phase 400 V / 50 Hz power supply, ensuring stable operation in industrial facilities without the risk of system overload. The suction port system (3 × 100 mm and 1 × 150 mm) allows multiple machines to be connected simultaneously or enables the use of reducers depending on the dust extraction system requirements. Precision and Performance The FM300SN stands out for its high efficiency in transporting sawdust and dust, even in heavily contaminated environments. Carefully optimized aerodynamic parameters ensure constant airflow, minimizing the risk of blockages within the system. As a result, the fan not only maintains a clean working environment but also extends the service life of connected machines by reducing their exposure to process dust. Applications The FM300SN is designed for environments requiring highly efficient sawdust and chip extraction systems during woodworking operations. It is particularly recommended for: carpentry workshops furniture manufacturing plants production of solid wood panels and components central dust extraction systems in production halls Compatible with machines such as: planers and jointers thickness planers spindle moulders sliding table saws edge banders Standard Equipment powder-coated steel housing three-phase 400 V motor aluminum impeller with direct drive suction ports: 1 × 150 mm and 3 × 100 mm Optional Equipment flexible hoses Ø100 mm, Ø120 mm, Ø150 mm filter bags Technical Specifications Parameter Value Motor power 2.2 kW Speed 2950 rpm Extraction capacity 3900 m³/h Inlet diameter 150 mm / 3 × 100 mm Outlet diameter 120 mm Voltage / Frequency 400 V / 50 Hz Dimensions (L × W × H) 440 × 430 × 450 mm Weight 30 kg

Condition: new, functionality: fully functional, Year of construction: 2026, A machine ideal both for professional and amateur joiners. The fan optimal output works perfectly with the machines such as: planing machines, surfacers, thicknessing machines, milling machines, scaleboarding machines and dimension saws. Machine characteristics MOTOR POWER 3,8kW Hfsdevu Anujpfx Ag Ijg REVOUTIONS 2950 rpm SUCTION OFF EFFICIENCY 4860 m3/h SUCTION FERRULE DIAMETER 4x 100 mm /1 x 180 VOLTAGE/FREQUENCY 3/400V

Year of construction: 1990, condition: good (used), Throwing fan ideal for wood chips, with feed conveyor belt approximately 3 m long. Blade span 900 mm, equipped with 11 kW motor. Hfodpfxoyy Uzcs Ag Ieg

Condition: reconditioned (used), Year of construction: 2020, functionality: fully functional, For sale: Aerzen GM 130L blower after refurbishment. 12-month warranty. We carry out blower overhauls. Hedpfsxzdvcjx Ag Iofg

Condition: new, Year of construction: 2026, The most powerful centrifugal fan FAN5500 reaches a capacity of up to 8000m3/h. The high vacuum created by the blade system at the right angle and the high motor power can cope with the toughest jobs.Thanks to the many years of experience of our CORMAK team, radial fans from the FAN series have been created. The design of a new technological line allowed us to create the LineWind metal turbine system. This is the most important feature of the centrifugal fans, enabling them to extract all kinds of pollutants with increased vacuum power thanks to a special blade system that has been profiled at the right angle. The centrifugal fan was developed for use in the carpentry, furniture, automotive, agricultural and manufacturing industries. Radial fans are used for: transport of shavings, sawdust, small granulates dusty air local exhaust ventilation drying systems dehumidifiers Multi-vane metal rotor! High efficiency ensured by a balanced impeller Thermal winding protection (thermal sensor). The extraction design has been enhanced with additional anti-vibration feet in the base to guarantee a stable and vibration-free operation of the unit. An emergency shutdown button meets the requirements of the PN-EN ISO 12100 and PN-EN ISO 13850 standards. An additional advantage is the use of branded flexible and resistant seals in sensitive areas, allowing high vacuums to be achieved without losses at individual connection points. Hfedpfxsvughls Ag Iog Reliability confirmed by Polish users who enjoy working with our machines every day. Technical specifications MAX. AIR CAPACITY 8000 m3/h inlet diameter 300 mm discharge diameter 250 mm ENGINE SPEED 2850 rpm DIMENSIONS 670 x 600 x 600 mm MOTOR POWER / VOLTAGE 5.5 kW/400 V WEIGHT 55 kg

Condition: new, Year of construction: 2026, The centrifugal fan allows for operation with increased vacuum power to extract various types of pollutants, thanks to a special blade system which has been profiled at an appropriate angle. The radial fan has been developed for use in the carpentry, furniture, automotive, agricultural and manufacturing industries. Thanks to the many years of experience of our CORMAK team, radial fans of the FAN series were created. Designing a new technological line allowed us to create the LineWind metal turbine system. This is the most important feature of the centrifugal fans, enabling them to extract all kinds of pollutants with increased vacuum power thanks to a special blade system that has been profiled at the right angle. The centrifugal fan was developed for use in the carpentry, furniture, automotive, agricultural and manufacturing industries. Radial fans are used for: transport of shavings, sawdust, small granulates dusty air local exhaust ventilation drying systems dehumidifiers Multi-vane metal rotor! Hfodpfx Agjvugg Ue Iog High efficiency ensured by a balanced impeller Thermal winding protection (thermal sensor). The extraction design has been enhanced with additional anti-vibration feet in the base to guarantee a stable and vibration-free operation of the unit. An emergency shutdown button meets the requirements of the PN-EN ISO 12100 and PN-EN ISO 13850 standards. An additional advantage is the use of branded flexible and resistant seals in sensitive areas, allowing high vacuums to be achieved without losses at individual connection points. Reliability confirmed by Polish users who enjoy working with our machines every day. Technical specifications MAX. AIR CAPACITY 4000 m3/h inlet diameter 200 mm discharge diameter 180 mm ENGINE SPEED 2850 rpm DIMENSIONS 575 x 550 x 500 mm MOTOR POWER / VOLTAGE 2,2 kW / 400 V WEIGHT 35,5 kg

Condition: new, Year of construction: 2026, The fan, created on the basis of a radial impeller blade system, is designed for handling waste generated during wood processing. The high vacuum and high motor power ensure a constant underpressure. Thanks to the many years of experience of our CORMAK team, FAN series radial fans were created. The design of the new technological line has allowed us to create a LineWind metal turbine system. This is the most important feature of radial fans, allowing with increased vacuum power to draw off various types of pollutions to a special blade system that has been profiled at the right angle. The radial fan was created for use in the carpentry, furniture, car, agricultural and manufacturing industries. Advantages: radial fans are using for: - transport of shavings, sawdust, small granules - dusty air - local exhaust - drying systems - air dryers multi-blade, balanced, low noise and high efficiency, metal rotor winding overload thermal protection (thermal sensor) anti-vibration, stabilising feet safety swith conformant withthe N-EN ISO 12100 and PN-EN ISO 13850 norms it is also includes flexible and durable gaskets in the most vital locations failure-free operation confirmed by users of our machines working with them every day CAPACITY MAX. 3000 m3/h INLET DIAMETER 150 mm Hsdpfx Aovuggbeg Iofg OUTLET DIAMETER 150 mm ROTATIONS 2850 obr/min DIMENSIONS 575 x 510 x 500 mm MOTOR POWER/VOLTAGE 1,5 kW/400 V WEIGHT 32,5 kg

Condition: new, Year of construction: 2026, Thanks to the many years of experience of our CORMAK team, FAN series radial fans were created. The design of the new technological line has allowed us to create a LineWind metal turbine system. This is the most important feature of radial fans, allowing with increased vacuum power to draw off various types of pollutions to a special blade system that has been profiled at the right angle. The radial fan was created for use in the carpentry, furniture, car, agricultural and manufacturing industries. Advantages: radial fans are using for: - transport of shavings, sawdust, small granules - dusty air - local exhaust - drying systems - air dryers multi-blade, balanced, low noise and high efficiency, metal rotor winding overload thermal protection (thermal sensor) Hedovuqyrspfx Ag Ijfg anti-vibration, stabilising feet safety swith conformant withthe N-EN ISO 12100 and PN-EN ISO 13850 norms it is also includes flexible and durable gaskets in the most vital locations failure-free operation confirmed by users of our machines working with them every day CAPACITY MAX. 7500 m3/h INLET DIAMETER 250 mm OUTLET DIAMETER 250 mm ROTATIONS 2850 obr/min DIMENSIONS 670 x 600 x 600 mm MOTOR POWER/VOLTAGE 4,0 kW/400 V WEIGHT 53 kg

Condition: excellent (used), - PRICE GIVEN IS FOR 1 UNIT - For sale: Side channel blower RIETSCHLE CEV 3718. Devices used in industry as: Hfodpfxsy Aautj Ag Isg air blowers vacuum pumps pneumatic conveying packaging and production systems Sturdy German construction – high-quality industrial equipment. ⚙️ Technical data (from nameplate): Model: CEV 3718 DS2 Capacity: up to 480 m³/h Pressure / vacuum: approx. ± 37 mbar / up to 50 mbar Power supply: 220–255 / 380–440 V Power: approx. 1.1 – 1.3 kW Speed: 2800 / 3440 rpm Protection class: IP54 ✔️ Condition as per photos 🔍 Condition: fully functional devices show normal signs of use upper plastic motor covers damaged – visible in the photos damage does not affect device operation sold exactly as pictured

Condition: good (used), radial fan, dust extraction blower, fan, extraction, dust blower Hfodpfx Aeb Ilxdog Iog -Engine power: 3.6 kW -Speed: 1440 rpm -Volume flow: approx. 6000 m³/h -Inlet connection: Ø 450 mm -Outlet connection: Ø 450 mm -Impeller: Ø 670 mm -Quantity: 1 available -Dimensions: 1200/1100/H1350 mm -Weight: 242 kg

Condition: used, Year of construction: 2005, functionality: fully functional, machine/vehicle number: 24288, power: 550 kW (747.79 HP), pressure: 4 bar, nominal heat output: 550 kW (747.79 HP), tank capacity: 1,546 l, operating pressure: 4 bar, Equipment: type plate available, We offer this used MAWERA FU 400 RIA heating system, year of manufacture 2005. Operating pressure: 4 bar Output: 440 kW Hedpfx Ajy D A A Njg Iefg If you have any questions or require further information, please feel free to send us a message or call us.

Condition: used, Year of construction: 2020, functionality: limited functionality, power: 40 kW (54.38 HP), For sale Low NOx premix gas burners (2.pc) from ACV Delta Pro S. Hfjdey Dvbljpfx Ag Iog

Condition: used, Year of construction: 2007, functionality: fully functional, power: 320 kW (435.08 HP), total width: 2,780 mm, total length: 3,340 mm, total height: 2,560 mm, Equipment: documentation/manual, Fröling wood chip and pellet boiler "Turbomat" 320 kW Year of manufacture: 2007 Completely overhauled and newly lined with refractory bricks in 2019 Comes with electrical control panel, with the option for automatic error reporting via app. Dimensions: see images Hsdpsxb Erfefx Ag Iefg Wood chips, biomass, pellets, heating system, pellet heating, carpentry chips, carpenter, joinery, wood shavings, sawdust. Cleaning springs for the heat exchanger base have been removed but are included as new spare parts. Does not include silo discharge system, but does include drop chute and rotary valve. Chimney with induced draft fans, chimney with 35 cm diameter included. Riser flue not included. Has always been maintained and is in good condition. The system can be transported out of the building at ground level. No guarantee or warranty.

Condition: excellent (used), Year of construction: 2026, functionality: fully functional, power: 420 kW (571.04 HP), overall weight: 2,000 kg, total width: 2,600 mm, total length: 3,200 mm, total height: 2,800 mm, temperature: 90 °C, operating pressure: 4 bar, For sale hot water boiler house 420kW (3 m sea container covered with sendwitch panels 100mm). Consist of hot water boiler 420kW, gas burner Baltur TBG 55 (110-550kW). Internal gas pipes. Internal hot water pipes with pumps. 3m chimney. Can be equipped with diesel oil burner. Hodpfx Aoy Dn Uqsg Iefg

Condition: used, Year of construction: 2002, functionality: limited functionality, machine/vehicle number: 5090176, power: 1,190 kW (1,617.95 HP), Equipment: documentation/manual, For sale Sliding two stage and modulating regulation (ZM) diesel oil burner Weishaupt RL5 180-1190kW, 2002. Only burner. Control cabinet with burner control box (LAL2.25) not available. Hedpfxsy Dccis Ag Iofg

Condition: good (used), mileage: 348,039 km, power: 330 kW (448.67 HP), first registration: 04/2022, fuel type: diesel, tire size: 385 / 65 / R22.5, axle configuration: 4x2, wheelbase: 3,850 mm, fuel: diesel, color: white, driver cabin: sleeper cab, gearing type: automatic, number of gears: 12, suspension: steel-air, total length: 6,310 mm, total width: 2,550 mm, total height: 4,000 mm, permissible axle load (axle 1): 8,000 kg, permissible axle load (axle 2): 11,500 kg, Year of construction: 2022, Equipment: ABS, air conditioning, central locking, cruise control, differential lock, electric window regulation, fog lights, fridge, navigation system, parking air conditioner, power mirror, soot filter, spoiler, General information Number of doors: 2 Cab: Gigaspace Technical information Number of cylinders: 6 Engine capacity: 12.809 cc Transmission Transmission: Mercedes-Benz, 12 gears, Automatic Axle configuration Make axles: Mercedes-Benz Brakes: disc brakes Front axle: Tyre size: 385 / 65 / R22.5; Max. axle load: 8000 kg; Steering; Tyre profile left: 40%; Tyre profile right: 40%; Suspension: leaf suspension Rear axle: Tyre size: 315 / 70 / R22.5; Double wheels; Differential lock; Max. axle load: 11500 kg; Tyre profile left inner: 40%; Tyre profile left outer: 40%; Tyre profile right outer: 40%; Tyre profile right outer: 40%; Reduction: single reduction; Suspension: air suspension Weights Empty weight: 7.807 kg Carrying capacity: 11.193 kg GVW: 19.000 kg Interior Interior: grey Number of seats: 2 Environment Emission class: Euro 6d Hfedpfx Ajy Akbkog Ijg History Number of owners: 3 Condition Technical condition: good Visual appearance: good Number of keys: 1 (1 hand transmitter) Product safety Manufacturer: Kuijpers Trading BV Minosstraat 8 5048CK TILBURG, NL = Additional options and accessories = - 12 volt socket - Aluminium fuel tank - Armrest - Baggage cover - Car kit - Low-noise - Particulate filter - Power take-off (PTO) - PTO - Radio - Radio, MP3 enabled - Remote central locking - Speed limiter - Stability control - stand airco - Toolbox - Visor - Webasto

Condition: good (used), mileage: 331,797 km, power: 330 kW (448.67 HP), first registration: 04/2022, fuel type: diesel, tire size: 385 / 65 / R22.5, axle configuration: 4x2, wheelbase: 3,850 mm, fuel: diesel, color: white, driver cabin: sleeper cab, gearing type: automatic, number of gears: 12, suspension: steel-air, total length: 6,310 mm, total width: 2,550 mm, total height: 4,000 mm, permissible axle load (axle 1): 8,000 kg, permissible axle load (axle 2): 11,500 kg, Year of construction: 2022, Equipment: ABS, air conditioning, central locking, cruise control, differential lock, electric window regulation, fog lights, navigation system, power mirror, spoiler, General information Number of doors: 2 Cab: Gigaspace Technical information Number of cylinders: 6 Engine capacity: 12.809 cc Transmission Transmission: Mercedes-Benz, 12 gears, Automatic Axle configuration Make axles: Mercedes-Benz Brakes: disc brakes Front axle: Tyre size: 385 / 65 / R22.5; Max. axle load: 8000 kg; Steering; Tyre profile left: 50%; Tyre profile right: 50%; Suspension: leaf suspension Rear axle: Tyre size: 315 / 70 / R22.5; Double wheels; Differential lock; Max. axle load: 11500 kg; Tyre profile left inner: 50%; Tyre profile left outer: 50%; Tyre profile right outer: 50%; Tyre profile right outer: 50%; Reduction: single reduction; Suspension: air suspension Weights Empty weight: 7.807 kg Carrying capacity: 11.193 kg GVW: 19.000 kg Interior Interior: grey Number of seats: 2 Environment Emission class: Euro 6d History Number of owners: 3 Condition Technical condition: good Visual appearance: good Number of keys: 1 (1 hand transmitter) Product safety Manufacturer: Kuijpers Trading BV Minosstraat 8 5048CK TILBURG, NL = Additional options and accessories = - 12 volt socket - Aluminium fuel tank - Armrest - Baggage cover - Car kit - Hydraulic - Low-noise Hfsdjy Akbdopfx Ag Iog - Power take-off (PTO) - PTO - Radio - Radio, MP3 enabled - Remote central locking - Speed limiter - Stability control - Toolbox - Visor - Webasto

Condition: good (used), mileage: 384,310 km, power: 330 kW (448.67 HP), first registration: 04/2022, fuel type: diesel, tire size: 385 / 65 / R22.5, axle configuration: 4x2, wheelbase: 3,850 mm, fuel: diesel, color: white, driver cabin: sleeper cab, gearing type: automatic, number of gears: 12, suspension: steel-air, total length: 6,310 mm, total width: 2,550 mm, total height: 4,000 mm, permissible axle load (axle 1): 8,000 kg, permissible axle load (axle 2): 11,500 kg, Year of construction: 2022, Equipment: ABS, air conditioning, central locking, cruise control, differential lock, electric window regulation, fog lights, fridge, navigation system, parking air conditioner, power mirror, soot filter, spoiler, General information Number of doors: 2 Cab: Gigaspace Technical information Number of cylinders: 6 Engine capacity: 12.809 cc Transmission Transmission: Mercedes-Benz, 12 gears, Automatic Axle configuration Make axles: Mercedes-Benz Brakes: disc brakes Front axle: Tyre size: 385 / 65 / R22.5; Max. axle load: 8000 kg; Steering; Tyre profile left: 50%; Tyre profile right: 50%; Suspension: leaf suspension Rear axle: Tyre size: 315 / 70 / R22.5; Double wheels; Differential lock; Max. axle load: 11500 kg; Tyre profile left inner: 40%; Tyre profile left outer: 40%; Tyre profile right outer: 40%; Tyre profile right outer: 40%; Reduction: single reduction; Suspension: air suspension Weights Empty weight: 7.807 kg Carrying capacity: 11.193 kg GVW: 19.000 kg Interior Interior: grey Number of seats: 2 Environment Emission class: Euro 6d History Number of owners: 3 Condition Technical condition: good Visual appearance: good Number of keys: 1 (1 hand transmitter) Product safety Manufacturer: Kuijpers Trading BV Minosstraat 8 5048CK TILBURG, NL = Additional options and accessories = - 12 volt socket - Aluminium fuel tank - Armrest - Baggage cover - Car kit - Hydraulic - Low-noise - Particulate filter Hfsdpfoy Aka Tjx Ag Ijg - Power take-off (PTO) - PTO - Radio - Radio, MP3 enabled - Remote central locking - Speed limiter - Stability control - stand airco - Toolbox - Visor - Webasto

Condition: ready for operation (used), functionality: fully functional, Several used radial fans are being offered here, including Siemens electric motors in various power ratings and sizes. The fans can be used for supply or exhaust air applications. They originate from a furnace system and are therefore heat-resistant. Currently, 5 fans are available for sale. 1x Alko Therm GmbH RZR 15-630 Siemens 1LA2186-4AA60-ZA11 22 kW / 1460 rpm (Sold) 1x Gebhardt Ventilatoren RZR 11-0560 LG/90 Siemens 1LA7163-4AA60 11 kW / 1460 rpm 1x Alko Therm GmbH RZR 15-710 Siemens 1LA2207-4AA60-ZA11 30 kW / 1465 rpm 1x Alko Therm GmbH RZR 15-710 Hfjdpfxjyrffbs Ag Ieg Siemens - 1x Alko Therm GmbH RZR 15-0630 1x Gebhardt Ventilatoren RZR 11-0560 LG/90 Siemens 1LA7163-4AA60Z 11 kW / 1460 rpm Radial fan, centrifugal blower, centrifugal fan

Condition: excellent (used), Year of construction: 2015, operating hours: 1 h, functionality: fully functional, machine/vehicle number: Z000071400101, total width: 1,400 mm, total length: 2,050 mm, total height: 2,150 mm, type of input current: three-phase, overall weight: 1,100 kg, Powerful industrial blower suitable for a variety of applications. The stationary fan with a 600 mm diameter can be used for cooling, ventilation, heat dissipation, or for displacing water mist and dust. The unit has four rollers and forklift pockets for loading. Hsdpfxewbfm Ss Ag Iefg Electric motor power (blower): 15 kW Air flow rate: 33,000 m³/h Speed: 13.8 kW / 1470 rpm Electrical connection: 400 volts / 50 Hz / 32 amps Cable length: 5.0 m Pickup and inspection available in D-89188 Merklingen.

Condition: ready for operation (used), Year of construction: 1999, Schuko K350 10,000 m³/h Hodpfx Asyx Uxfsg Iefg 11 kW

Condition: like new (used), Year of construction: 2021, functionality: fully functional, overall weight: 90 kg, total length: 4,900 mm, type of input current: AC, input voltage: 230 V, fuel: domestic gas H, input frequency: 50 Hz, gas tube heater Solaronics TU.E 23 more pieces in stock production year: 2020-22 heat output: 23kw gas burner + exhaust fan pipe length: 2x 4.9 meters G20.1 Nominal connection pressure: 25 mbar Nominal gas consumption: approx. 2.5 m3/h Gas connection: 1/2 " Connection voltage: IP21 AC 230V 50Hz Hfsdpfxjq Hu Afs Ag Ieg

Condition: excellent (used), Year of construction: 2018, overall weight: 170 kg, AERZEN D28L SCREW BLOWER STAGE 6 MONTHS WARRANTY Hfsdjwiwg Tepfx Ag Iog

Condition: excellent (used), Siemens side channel blower vacuum pump Hfsdev Irgmopfx Ag Isg