Used Cronosstech Chp 2000 for sale (7,724)

Condition: used, plate width 2870 mm plate depth 2000 mm plate height 300 mm weight 5200 kg flute distance 250 mm 3 identical plate fields available (A2017) Todpey S Dzijfx Abtob LxWxH: 2870 x 2000 x 300mm Area for 3 slab fields: 17.22m² Dimension of the T-slots; 36 x 64 mm - height: 45 mm Weight: KG

Condition: new, plate depth 4000 mm plate width 2000 mm plate height 600 mm weight 6700 kg GERD WOLFF clamping cube 4000 x 2000 x 600 mm If you cannot find your desired size, simply send us an email with the completed PDF form. We can then provide you with a custom plate tailored to your requirements. T-slot size: 52 x 28 T-slot spacing: 500 Number of grooves: 8 x 8 Edge distance: 250 Tsdoymf I Eepfx Abtsb Weight: 6700 kg Casting quality HT250 Flatness less than 0.12 mm Surface machined according to DIN 876/II Keywords: Clamping cube, Cubic clamping table, Multi-sided clamping, Angle clamping cube, Precision cube, CNC clamping cube, Clamping angle, Machine cube, 90-degree clamping device, Drilling cube, Modular clamping cube, Workpiece positioning, Mounting cube, Fixing cube, Clamping block

Condition: new, table length 3000 mm table width 2000 mm table height 200 mm weight 1700 kg Manufacturer: GERD WOLFF Technical Details: • Length 3000 mm • Width 2000 mm • Height 200 mm • Weight 1700 kg • Hole diameter 28 mm • Hole spacing 100 mm • Plate thickness: 25mm Advantages and Features: • 3-day gas nitriding process • Increased corrosion resistance • Weld spatter adhesion protection • Maximum load capacity • Enhanced fatigue strength • Improved vibration resistance • Fine scale engraving • Reinforcement with welded seams and ribs on the underside • Optimal working height of 820-865 mm • 8 height-adjustable support legs • Available with a matching accessory set (optional) • Plate thickness: 25mm Our welding tables are manufactured using HT 300 cast iron and are nitrided as a whole after mechanical processing. Furthermore, they feature precise fine scale engraving using laser technology. To ensure adequate stability, our welding tables are reinforced with welded seams and ribs on the underside (see illustrations). Additionally, they undergo a 3-day gas nitriding process, enhancing their corrosion resistance, fatigue strength, and vibration resistance, among other factors. All our tables come with adjustable legs. The minimum height adjustment range is 620 mm, while the maximum is 665 mm, allowing for a variable working height of 820 to 865 mm. Additional available dimensions: • 1000 x 1000 x 200 • 2000 x 1000 x 200 • 1200 x 1200 x 200 • 1500 x 1000 x 200 • 1500 x 1500 x 200 • 1500 x 2000 x 200 • 2000 x 3000 x 200 • 3000 x 1500 x 200 • 3000 x 2000 x 200 • 4000 x 2000 x 200 • 2400 x 1200 x 200 Please note that the images are not to scale and are for illustrative purposes only. Our welding tables are produced for our distribution brand "GERD WOLFF Maschinenfabrik" by a reputable manufacturer. Tsdpfx Abjymf R Heteb 3D Welding Table - 3D Clamping Fixtures - 3D Precision Welding Table

Condition: new, plate depth 2000 mm plate width 1000 mm plate height 600 mm Tsdpfxeymf Uxe Abtsb weight 1800 kg GERD WOLFF clamping cube 2000 x 1000 x 600 mm If you cannot find your desired size, simply send us an email with the completed PDF form. We can then provide you with a custom plate tailored to your requirements. T-slot size: 38 x 22 T-slot spacing: 140 Number of slots: 10 Edge distance: 80 Weight: 1800 kg Casting quality HT250 Flatness less than 0.12 mm Surface machined according to DIN 876/III Keywords: Clamping cube, Cubic clamping table, Multi-sided clamping, Angle clamping cube, Precision cube, CNC clamping cube, Clamping angle, Machine cube, 90-degree clamping device, Drilling cube, Modular clamping cube, Workpiece positioning, Mounting cube, Fixing cube, Clamping block

Condition: new, Year of construction: 2025, overall weight: 1,800 kg, total height: 600 mm, total length: 2,000 mm, total width: 1,000 mm, plate height: 600 mm, groove spacing: 140 mm, GERD WOLFF Clamping cube 2000 x 1000 x 600 mm If you cannot find the size you require, simply send us an email with the completed PDF form. This will enable us to offer you a customised plate tailored to your requirements. T-slots – size: 38 x 22 T-slot spacing: 140 Number of slots: 10 Edge distance: 80 Weight: 1800 kg Cast iron quality HT250 Flatness less than 0.12 mm Tedpoxbpihjfx Abteb Surface machined according to DIN 876/III Clamping cube, cubic clamping table, multi-sided clamping, angle clamping cube, precision cube, CNC clamping cube, clamping angle, machine cube, 90-degree clamping device, drill hole cube, modular clamping cubes, workpiece positioning, assembly cube, fixing cube, clamping block

Condition: used, Year of construction: 2008, cutting diameter 1500 mm saw band length 15050 mm cutting width 2000 mm total power requirement 45 kW weight of the machine ca. 43.500 kg required space 3862 x 2110 mm FRIGGI 2MF GANTRY 1500 x 2000 x 9000 Manufacturer: FRIGGI S.r.l. Tedpfezk Rh Rox Abtjb Address: Via Vitt. Veneto 13, 20086 Motta Visconti (MI), Italy Model: 2MF GANTRY Type / Version: 1500 x 2000 x 9000 Serial Number: 3610 Year of Manufacture: 2009 Weight: 43500 kg CUTTING CAPACITY Rectangular Profile: 1500 x 2000 mm Round Profile: Ø 1500 mm Gantry Stroke: 9600 mm SAW BLADE Band Dimensions: 80 x 1.6 mm Max. Band Length: 15050 mm Band Speed: 10 – 120 m/min DRIVES Band Motor Power: 18.5 kW Bow Motor Torque: 12 Nm Gantry Motor Power: 2 x 12 Nm Flywheel Diameter: 2x 1200 mm + 2x 620 mm HYDRAULICS Hydraulic Tank Capacity: 120 Liters Hydraulic Pump Flow Rate: 23 l/min Hydraulic Pump Motor Power: 4 kW ELECTRICAL DATA Installed Power: 45 kW Supply Voltage: 400 V Max. Current Draw: 80 A Frequency: 50 Hz Power Factor: 0.8 COLOR Structure Color: RAL 7039 Flywheel Covers Color: RAL 7021 Moving Parts Color: RAL 2004 TYPE PLATE / CE DECLARATION CE Marking: Yes (Directive 98/37/EC etc.) CE Declaration Date: 19.03.2009

Condition: new, Year of construction: 2023, functionality: fully functional, machine/vehicle number: 61036721, clamping force: 6,500 kN, screw diameter: 70 mm, clearance between the columns: 1,110 mm, displacement volume: 1,078 cm³, injection pressure: 1,877 bar, injection weight: 981 g, opening stroke: 3,200 mm, plate height: 1,540 mm, drive type: Hydraulisch, clear span: 3,200 mm, tool weight: 22,00,000 g, Injection Moulding Machines Directly from the Manufacturer! As the manufacturer KraussMaffei, we offer you our certified and flexible stock machines: The hydromechanical two-platen clamping unit of the GXW machine sets new standards in terms of quality and productivity. With the sophisticated GuideX sliding shoe, forces are ideally absorbed and the service life of the moulds is extended. The innovative GearX locking system engages instantly and reliably. Powerful, user-friendly and value-retaining. TECHNICAL DATA: KM 650 / 2000 / 2000 GXW G06 (Order 38618339) CONTROL SYSTEM - MC 6 with 24'' TFT color screen with multitouch functions CLAMPING UNIT - Clamping force: 6500 kN - Max. mould opening force: 455 kN - Daylight opening (h x v): 1110 x 960 mm - Platen size (h x v): 1540 x 1440 mm - Mould installation height min. - max.: 1550 mm (without centre platen) - Opening stroke: 3200 mm - Max. mould opening distance: 1650 mm - Max. mould weight: 22,000 kg INJECTION UNIT 1 SP2000 - Screw diameter / type: 60 mm / thermoplastics - Effective L/D ratio: 23.3 - Injection pressure: 2420 bar - Shot volume: 792 cm³ - Shot weight at max. stroke for PS: 720 g - Injection speed: 140 mm/s - Injection throughput: 396 cm³/s - Screw drive speed: 285 rpm - Plasticizing throughput: 72.2 g/s - Nozzle contact force: 82 kN INJECTION UNIT 2 SP2000 - Screw diameter / type: 70 mm / thermoplastics - Effective L/D ratio: 20 - Injection pressure: 1877 bar - Shot volume: 1078 cm³ - Shot weight at max. stroke for PS: 981 g - Injection speed: 140 mm/s - Injection throughput: 539 cm³/s - Screw drive speed: 285 rpm - Plasticizing throughput: 98.3 g/s - Nozzle contact force: 82 kN ELECTRICAL PARAMETERS - Connected load: 341 kW - Power supply: 400 V / 50 Hz, 3 phases with neutral conductor WEIGHT & DIMENSIONS - Net weight: 43.5 t - L x W x H: 11.89 x 3.22 x 2.77 m ADDITIONAL EQUIPMENT - Wear-resistant plasticizing unit - BluePower full insulation for plasticizing cylinder - Open nozzle - BluePower ServoDrive - Pneumatic valve: 1-fold (BWAP), 1-fold (FWAP) - Pneumatic cascade valves: 6-fold (BWAP), 6-fold (FWAP) - Hydraulic core pull: 2-fold (BWAP), 2-fold (FWAP) Tjdjw U N Ixepfx Abteb - Mould heating: 96 zones (3.5 kW each) - Euromap interface for handling: E18 - Euromap central computer interfaces: E67, E77, E78, E63, E82.1 - Adaptive Process Control (APC+) - Graphic analysis package - Sliding table with turning unit, servo-driven - Vertical centre platen - Parallel clamping & opening during injection process with bar parallelism control between FWAP and centre platen or BWAP and centre platen - ColorForm interface signal interface for connecting an RPM unit - Electrical interface for HRS-Flexflow system - Electrical interface and hydraulic valves for "1-K dummy operation" - Interface for connecting a CoMo-Kistler Injection Basic System with good/bad part separation The machine is located at our plant in Parsdorf and is available at short notice. Further additional options can be offered on request. We look forward to your enquiry.

Condition: used, Year of construction: 2002, UV dryer, Cefla UV 2000 - Manufacturer Cefla/Sorbini - Type UV 2000 M2 / TN3000 - Year of manufacture 2003 - Working width 1.300 mm (1.445) mm - Working height 900 + - 40 mm - Operating side right - Max. part height 70 mm - Number of tubes from above 2 pcs. - diagonally positioned tubes 2 pcs. - Suitable for mercury tubes Todpfx Absyifwpetsb - Suitable for gallium tubes - Tube power max. 120 W/cm - with belt transport - Length 3.000 mm - Width 2.300 mm - Height 1.500 mm - Volts, Hz 400 /50 - Total electrical connection 86 A / 36.4 kW - Voltage fluctuations max. +/- 5%

Condition: good (used), Year of construction: 2005, Parts shown by hand not come. Tjdpfx Abozt Sametjb

Condition: reconditioned (used), Year of construction: 1998, functionality: fully functional, Fully automatic package jointing line 500 mm Packaging width - Consisting of: - Finger jointing Central Milling Machine - 2 fixed transport tables - 1 Wheeled processing unit - 2 milling spindles - 2 flakers - Glue - Separating station with tilt-back - Threading section 2 transport chains - Feed with double rollers - Extrusion press 12 ton - crosscut Tsdpslatv Asfx Abtjb - Packaging width 500 mm - wood in max. 1950 mm - wood in min. 200 mm - Workpiece 50-215 mm - Workpiece thickness of 25 to 100 mm - Performance 2,5- 3 tables / min - Press force max. 12000 kp - Length of the threading section 3900 mm - Lenght of the press bed 5000 mm - wood with fingerjoint endless - Engine performance milling spindle 2x18,5 kW - Engine chipper 2x 7.5 kW

Condition: good (used), Transport trolley, order picking trolley, Corlette, furniture transport trolley, roll container, furniture Corlette, roll container, order picking trolley, sofa trolley, upholstered furniture trolley, trolley, upholstered trolley Tsdpfjzt Nt Dox Abtsb -Manufacturer: Cordes, Furniture transport trolley - Corlette -Type: Furniture Corlette 2000 2000x1150x2350 mm Folding and collapsible -Load capacity: approx. 600 kg -Quantity: 1x transport trolley available -Dimensions: 2100/1220/H2350 mm -Weight: 97 kg

Year of construction: 2019, condition: used, For sale: a partial injection molding cell consisting of a hydraulic press, a linear Cartesian robot, and a perimeter safety fence. This system is ideal for those seeking a ready-to-use package for molding and automatically unloading parts. The package includes only the 3 items listed below: Tsdpfozw H Dbjx Abtob 1. HYDRAULIC INJECTION MOLDING MACHINE Brand and Model: ARBURG ALLROUNDER 520 C 2000-675 Year of manufacture: 1998 Clamping force: 2,000 kN (200 tons) Screw diameter: 50 mm Distance between columns: 520 × 520 mm Platen size: approximately 715 × 715 mm Opening stroke: approximately 650 mm Control: SELOGICA Machine weight: approximately 6,500 kg 2. LINEAR CARTESIAN ROBOT Brand and Model: STAR AUTOMATION XW-1000VI 2V Year of manufacture: 2019 Configuration: 3 servo-assisted linear axes (brushless motors), space-saving telescopic vertical arm. Included: Control cabinet, original operating keyboard (remote control) for programming, and manuals. 3. PERIMETER SAFETY FENCE Manufacturer: Star Automation Europe Features: Modular structure with a metal mesh to protect the work area. Access door equipped with safety microswitches and an interlocked electric lock. Included: External control panel for access requests and emergency chain reset.

Condition: used, Year of construction: 1998, functionality: fully functional, machine/vehicle number: 173340, clamping force: 2,000 kN, screw diameter: 50 mm, clearance between the columns: 520 mm, plate length: 715 mm, plate height: 715 mm, total length: 5,360 mm, total width: 1,800 mm, total height: 2,200 mm, overall weight: 6,900 kg, Equipment: documentation/manual, ARBURG ALLROUNDER 520 C 2000-675, hydraulic injection molding machine for plastics, year of manufacture 1998. The machine has a clamping force of 2,000 kN (200 tons) and an injection unit with a 50 mm diameter screw. Technical data: Manufacturer: ARBURG Model: ALLROUNDER 520 C 2000-675 Year of manufacture: 1998 Clamping force: 2,000 kN / 200 tons Injection unit: 675 Todpfx Abezw Hnyotsb Screw diameter: 50 mm Distance between columns: 520 × 520 mm Platen size: approximately 715 × 715 mm Opening stroke: approximately 650 mm Control: SELOGICA Condition: The machine was dismantled in perfect working order and is sold in its current condition. Operating hours are not available. The machine is available for viewing/inspection by appointment. Sale includes the injection molding machine only. The Cartesian robot and other components of the cell can be purchased separately.

Condition: refurbished (used), Year of construction: 2012, functionality: fully functional, travel distance X-axis: 350 mm, travel distance Y-axis: 250 mm, travel distance Z-axis: 256 mm, GF AgieCharmilles CUT 2000 Oiltech Year of manufacture: 2012 Travel distances: X = 350 mm, Y = 250 mm, Z = 256 mm Travel distances U/V axis: +/- 70 mm Maximum taper: 30° at 100 mm height Maximum workpiece dimensions: 750 x 550 x 250 mm Maximum workpiece weight: 200/450 kg AGIE IPG-VO generator Achievable surface quality: Ra: 0.05 µm Available wire diameters: 0.07 – 0.30 mm including option KIT 70 Water bath machine with automatic wire threading With automatically lowering tank (accessible from 2 sides) Includes AGIEJOGGER hand box for comfortable setup VISION 5 control 15" LCD color screen, jog control panel and mouse Includes AGIESETUP 3D Includes Fast-Threading option Dimensions (length x width x height): 2095 x 1950 x 2232 mm Net weight: 3600 kg The machine will be completely overhauled and tested by us. A customized test cut is also possible. We also offer commissioning and on-site training for this machine. Tedjztp Emepfx Abteb

Condition: used, Year of construction: 2021, Carrying capacity: 4.500 kg Attachment suited for: Construction machines Tjdpezxqdnsfx Abteb

Condition: like new (used), Year of construction: 2023, operating hours: 1 h, actuation type: manual, working width: 2,030 mm, back gauge: 750 mm, Equipment: documentation/manual, type plate available, Panel shear, like new, unused. The machine was delivered by Schröder in January 2023 and put into operation. Since it was unsuitable for the intended application (see photos), it was subsequently stored and is in absolutely new condition. The new price was €12,381 (excluding transport + assembly). Manufacturer: SCHRÖDER Type: HS 2000 x 1.25 Year of manufacture: 2023 Usable length: 2,030 mm Cutting capacity at 400 N/mm2: 1.25 mm Equipment: - Rear stop 750 mm, digital display, adjustable at the front - Hold-down device 750 mm - Stainless steel blade - Clamping beam with hard rubber strip Todpfszl A Raex Abtsb - Front support table, extendable - Angle stop right + left - Sliding carriage

Condition: excellent (used), Year of construction: 1995, Maximum center height: 330 mm Maximum distance between centers: 2000 mm Working area: Max. turning diameter over bed cover: 650 mm Max. turning diameter over cross slide: 360 mm Main spindle: Spindle diameter at front bearing: 140 mm Spindle bore: 107 mm Main drive: 58.5 kW 2-stage speed range: 4 – 750 rpm / 750 – 3060 rpm Tedpfxox Sx Htj Abteb Feed drive: Rapid traverse rate X/Z axis: 10/10 m/min Turret: Number of tool positions: 12 Of which, driven tool positions: 6 Cylindrical shank tool holder: VDI 50 mm Dimensions / Weight: Footprint L x W x H: approx. 6400 x 2150 x 2000 mm Weight: 9400 kg Accessories / Special features: • CNC control system HEIDENHAIN TurnPlus EP 90 with color screen • Spindle orientation C-axis • 12-position turret, VDI 50, of which 6 positions with driven tools, manufacturer SAUTER DIN 5482 B 20x17, max. speed 3000 rpm. • Hydraulic 3-jaw chuck Ø 315 mm with various clamping jaws • Hydraulic steady rest with follower device • Hydraulic quill actuation • Air extraction system, manufacturer LTA • Various tool holders VDI 50 • CE compliant In 08/2025, GILDEMEISTER Service replaced the following parts: 1 servo motor, 1 AC servocontroller inverter power module for 2 axes, 1 power module Simodrive, 1 rectifier/inverter module, 1 control unit for 1 axis, 1 control module for 2 axes inverter servo drive, 1 Simodrive power module (1-axis motor) Total repair costs: 17,000.00 EUR net Siegfried Volz Werkzeugmaschinen Rüschebrinkstr. 151-153 DE - 44143 Dortmund - Wambel

Condition: good (used), axle configuration: 1 axle, permissible axle load (axle 1): 10,000 kg, first registration: 12/2012, loading space length: 10,600 mm, loading space width: 2,480 mm, loading space height: 2,620 mm, total length: 10,890 mm, total width: 2,550 mm, total height: 4,000 mm, suspension: air, tire size: 275 / 70 / R22.5, wheelbase: 7,060 mm, color: green, Year of construction: 2012, Equipment: tail-lift, Axle configuration Tyre size: 275 / 70 / R22.5 Make axles: SAF Brakes: disc brakes Suspension: air suspension Rear axle: Double wheels; Max. axle load: 10000 kg; Steering; Tyre profile left inner: 30%; Tyre profile left outer: 30%; Tyre profile right outer: 30%; Tyre profile right outer: 30% Weights Empty weight: 6.880 kg Carrying capacity: 15.120 kg GVW: 22.000 kg Functional Tail lift: Dhollandia DHLSU.40, tail lift, 2000 kg Make of bodywork: Groenewegen Jumbo Plywood Box Maintenance, history and condition Number of owners: 1 APK (MOT): tested until 12/2026 Technical condition: good Visual appearance: good Product safety Manufacturer: Kuijpers Trading BV Minosstraat 8 5048CK TILBURG, NL Tjdozxirdopfx Abtob

Condition: good (used), Offer 26117 Technical data: - Worktop, approx. dimensions: W 2000 x D 700 mm - Worktop thickness, approx.: 45 mm - Working height, approx.: 850 mm Tjdpfxszkg E Es Abtjb - 2 pcs. drawers on roller bearings - Drawer extension, approx.: 80% - Drawer dimensions, approx.: W 500 x D 500 x H 150 mm - 2 cabinets with doors - Space required, approx.: W 2000 x D 700 x H 850 mm - Weight, approx.: 100 kg

Year of construction: 1993, condition: ready for operation (used), Vertical lathe machining centre Dörries Scharmann type: VCE 2000/160 Pallet size: 1.600 mm Pallet load: max. 8.000 kg Number of pallets 13 pcs Table indexing C-Axis 0.001° Table cross travel (X) 2.300 mm Column longitudinal travel (Z) 1.500 mm Crossbeam positions: 9 steps off 100 mm Feed X/Y/Z 1 – 6.000 mm/min. Rapid X/Y/Z 8 m/min. Max rotary diameter 2.000 mm Max workpiece height 1.500 mm Main Spindle Spindle drive motor: 69KW Spindle speed: 2.8 – 315 rpm ATC for turning 59 pots - system 240.2 Live spindle – SK50 Spindle drive motor: 30KW Spindle speed: 10 – 1500 rpm ATC for SK50 61 pots CNC controller Siemens Sinumerik 880M Tedpfx Asguk S Ssbtsb Accessories FMS 13 pallets Rotary loading stations 2 pcs Coolant unit with filtration system Coolant through spindle Machine weight Approx 40T. Build year 1993

Condition: used, Year of construction: 2002, turning diameter max. 480 mm turning length max. 2.000 mm control Sinumerik 840 D Siemens Todpfovy Ig Tsx Abteb swing diameter max. over bed cover 520 mm turning speed range - main spindle 7 - 2.800 min/-1 transmission ratio 2 power capacity - main spindel 53 kW max. Torque 3.456 Nm spindle nose 11 DIN 55026 chuck diameter 315 mm spindle bore 103 mm usable bar diameter 82 mm x-travel 405 mm z-travel 2.049 mm diameter of quill 100 mm quill stroke 100 mm tension force 14 kN capture 30 DIN 2079 rapid traverse 10 m/min Working speed 0,1 - 10.000 mm/min feed power 15 kN number of toolpositions 12 pos. driven statition 6 pos. Shank diameter 50 mm power capacity 5,4 kW Max. Speed 2.500 / 625 min/-1 max. Torque 25 / 100 Nm total power requirement ca. 50 kW weight of the machine ca. 14 t dimensions of the machine ca. 6,4 x 3,8 x 3,0 m CNC-Lathe VDF BOEHRINGER - VDF 315 Cm / DL 2000

Condition: ready for operation (used), Year of construction: 1981, Immediately available ex works: Hydraulic guillotine shear Köllschen Model BSH 2000/12.5 Year of manufacture: 1981 Tjdozwuh Uspfx Abtsb Cutting length: 2050 mm Material thickness: up to 12.5 mm Motorized backgauge: 5 – 1000 mm Drive power: 15 kW Weight: 11 t Price: EUR 3,000 plus VAT ex location

Condition: good (used), Platform trolley, transport trolley, heavy-duty trolley, table trolley, assembly trolley, industrial trailer, container dolly, double turntable steering, heavy-duty trailer Tsdpfx Asl Sr Aasbtjb -Heavy-duty transport vehicle: Industrial trailer with 2-axle steering -Platform: 2000/990/H390 mm -Load capacity: 3.3 t -Tires: solid rubber -Number: 2x transport trolleys available -Price per piece -Transport dimensions: 3395/1200/H1380 mm -Weight: 340 kg/pc.

Condition: new, Fanuc A06B-0213-B100 AC servo motor, with pulse encoder A860-2000-T301, mounting hole spacing: 70 x 70 mm, unused, in very good condition, 100% functional. Todpfsi D Hyxex Abtsb

Year of construction: 2020, operating hours: 30 h, condition: new, Semiautomatic filler for hot or cold filling of fruit or vegetable juice or other liquids into bag in box bags with Vitop or Postmix seal. Components: Stainless steel buffer tank Pneumatic acted filling valve Stainless steel design with 4 rolllers Filling quantity: 3 to 20 l bag content Filling capacity 10 l bags approx. 2.000 l/h 5 l bags approx. 1.200 l/h The filling process is checked by the flowmeter system and controlled by a pneumatic valve. Todpo Uwrqofx Abteb bags evacuation before optional nitrogen superimposed after filling possible