Retsch in Bangladesh

Vvon Technologies Limited supplies, installs and services Retsch equipment across Bangladesh. 61 products are catalogued across Scientific & Laboratory Equipment.

Categories

• Materials Testing Lab (37)
• Soil Mechanics Lab (20)
• Food Technology Lab (3)
• Instrument Software (1)

Products

• PP 40: Pellet Press: Benchtop hydraulic press that compacts powdered samples into solid pellets for X-ray fluorescence analysis. Pressing force is up to 40 tons. Consistent pellet density matters for XRF because a poorly formed pellet changes the measured intensity, so a controlled press is part of the analytical chain rather than an accessory.
• TG 200: Fluid Bed Dryer: Fluid bed dryer that dries bulk material in a stream of warm air before milling or sieving, so moisture does not distort the particle size result. The material is held in suspension by the air stream, which gives short drying times and even treatment without local overheating.
• DR 100: Vibratory Feeder: Vibratory feeder that meters pourable bulk material and fine powder into a mill, divider or analyser at a steady rate. A continuous, even feed is what makes throughput and grinding results reproducible, particularly when a mill is running unattended.
• UR Series: Ultrasonic Baths: Ultrasonic baths for cleaning test sieves and grinding tools between samples. Removing residue from a sieve mesh matters because trapped particles change the effective aperture, and ultrasonic cleaning reaches the mesh without the mechanical damage that brushing causes.
• BB 50: Jaw Crusher: The compact benchtop jaw crusher in the range, designed for laboratories where bench space is limited and sample quantities are small. It crushes medium hard, hard, brittle and tough material down to below 0.5 mm, with the gap width set digitally in 0.1 mm increments so a size reduction step can be reproduced exactly.
• BB 200: Jaw Crusher: Floor standing jaw crusher aimed at fineness rather than feed size, taking medium hard, hard, brittle and tough material down to below 2 mm at up to 300 kg per hour. Grinding tools are available in several materials, so the crusher can be matched to samples where contamination from the jaws would affect the later analysis.
• BB 250: Jaw Crusher: Jaw crusher built around ergonomic handling, with the crushing chamber and collection vessel positioned for easy access during repeated sample changes. It handles large feed pieces of medium hard, hard, brittle and tough material and reduces them to below 2 mm at up to 300 kg per hour.
• BB 300: Jaw Crusher: Jaw crusher aimed at large feed size, accepting bigger pieces than the BB 200 and reducing them to below 5 mm at up to 600 kg per hour. The wider gap setting range suits primary crushing of rock, ore and construction material before a secondary mill takes the sample to analytical fineness.
• BB 400 XL: Jaw Crusher: Jaw crusher combining a large feed opening with ergonomic handling, reducing medium hard, hard, brittle and tough material to below 2 mm at up to 400 kg per hour. The XL designation refers to the enlarged crushing chamber relative to the standard models.
• BB 500 XL: Jaw Crusher: Jaw crusher with a steep crushing chamber and powerful drive, giving crushing kinematics that take 90 per cent of the product below 0.5 mm in a single pass. Throughput reaches 500 kg per hour, which suits mineral processing and cement laboratories handling continuous sample streams.
• BB 600 XL: Jaw Crusher: The largest jaw crusher in the Retsch range, taking the biggest feed pieces and delivering the highest throughput at 3500 kg per hour. Gap width is set with spacer plates from 6 mm to 60 mm. It is used where sample volumes are at pilot plant rather than laboratory scale.
• ZM 300: Ultra Centrifugal Mill: Rotor mill that grinds soft, medium hard, brittle and fibrous material to below 40 µm by impact and shearing between a rotor and a fixed ring sieve. Speed is freely selectable up to 23,000 rpm and the ring sieve sets the final fineness, so one mill covers a wide fineness range. Temperature monitoring protects heat sensitive samples.
• SR 300: Rotor Beater Mill: Rotor beater mill for coarse and fine size reduction of soft to medium hard material, working by impact against a fixed beater arrangement. Speed is adjustable in 500 rpm steps so grinding can be tuned to the sample, and a ring sieve defines the final fineness down to below 50 µm.
• SK 300: Cross Beater Mill: Cross beater mill for coarse and fine size reduction of medium hard and brittle material such as coal, coke, minerals and slag. It runs from laboratory to pilot plant scale and the adjustable rotor speed with an exchangeable bottom sieve sets the final fineness down to below 100 µm.
• HM 200: Hammer Mill: Hammer mill for crushing and pulverising large sample volumes of medium hard, hard, brittle, tough and fibrous material at up to 1500 kg per hour. Feed material is reduced by impact from swinging hammers and passes a bottom sieve at below 0.8 mm. Its size and throughput place it between laboratory and pilot plant duty.
• SM 50: Cutting Mill: Benchtop cutting mill for small quantities of soft, medium hard, tough, elastic and fibrous material such as plastics, textiles and plant matter. The grinding chamber design allows a high proportion of the sample to be recovered, which matters when only a small amount of material is available.
• SM 100: Cutting Mill: Basic model cutting mill for routine size reduction of soft, medium hard, elastic and fibrous material. A fixed 1,500 rpm rotor cuts the sample against stationary knives until it passes the bottom sieve, which sets the final fineness between 0.25 mm and 20 mm.
• SM 200: Cutting Mill: Standard cutting mill for preliminary size reduction of a wide range of soft, medium hard, tough, elastic and fibrous materials. It has a stronger drive than the SM 100 and a chamber arranged for straightforward cleaning between samples, which is the usual bottleneck when running mixed material types.
• SM 300: Cutting Mill: High performance cutting mill with RES technology, in which a flywheel stores energy and releases it into the cut, so the rotor holds speed through tough material that would stall a conventional mill. Speed is adjustable from 100 to 3000 rpm, which lets heat sensitive samples be run slowly.
• RM 200: Mortar Grinder: Motorised mortar and pestle that grinds, mixes and triturates soft, hard, brittle and pasty material, wet or dry, to below 10 µm. It reproduces the manual mortar process with a set pestle pressure and a fixed 100 rpm speed, so the result does not depend on who is operating it.
• DM 200: Disc Mill: Disc mill that reduces medium hard, hard and brittle material between a fixed and a rotating grinding disc, with the gap set continuously from 0.05 mm to 5 mm. It covers both preliminary and fine grinding, and the choice of disc material governs how fine it will go and how much contamination is introduced.
• RS 200: Vibratory Disc Mill: Vibratory disc mill that homogenises medium hard, hard, brittle and fibrous samples to below 20 µm in seconds, which is the fineness spectral analysis needs. A grinding set of rings and a puck oscillates horizontally inside a sealed jar, so the sample is not exposed and loss of fines is limited.
• RS 300 XL: Vibratory Disc Mill: Large capacity vibratory disc mill taking batches from 35 ml up to 2,000 ml, for laboratories preparing large samples for spectral analysis. It reaches the same sub 20 µm fineness as the RS 200 but with grinding sets up to 2 litres, so a bulk sample does not have to be split before grinding.
• Emax: High Energy Ball Mill: High energy ball mill that combines high frequency impact with intensive friction, reaching a final fineness below 80 nm. Integrated water cooling and temperature control allow long grinding runs without the sample overheating, which is what normally limits nanoscale grinding. It is used for nano grinding, mechanical alloying and colloidal milling.
• CryoMill: Mixer mill that cools the grinding jar continuously with liquid nitrogen to minus 196 degrees Celsius during grinding, so elastic and temperature sensitive material becomes brittle enough to fracture. Cooling runs before and throughout the cycle, and the jar is cooled rather than the sample being immersed, so the sample stays dry.
• MM 400: Mixer Mill: Multipurpose mixer mill for dry, wet and cryogenic grinding of small sample quantities, and for cell disruption in reaction vials. Two jars oscillate radially at 3 to 30 Hz, and typical grinding times are 30 seconds to 2 minutes. It also handles mixing and homogenisation, which makes it a general purpose bench unit.
• MM 500 control: Mixer Mill: High energy mixer mill with jar temperature control from minus 100 to 100 degrees Celsius, so the thermal conditions of a grinding or mechanochemical run can be set and held. It runs at up to 30 Hz for dry, wet and cryogenic grinding, and reaches a final fineness of about 0.1 µm.
• MM 500 nano: Mixer Mill: Mixer mill developed for producing particles in the nanometre range from batches of up to 2 x 45 ml, reaching about 0.1 µm. It supports dry, wet and cryogenic grinding as well as mechanochemistry and mechanical alloying, and the larger jar volume distinguishes it from the MM 400.
• MM 500 vario: Mixer Mill: Mixer mill with six grinding stations, so up to 50 samples can be processed in one run when adapter racks are used. It is aimed at laboratories with a high sample count rather than a single demanding sample, and covers mechanochemistry, homogenisation, size reduction and cryogenic grinding.
• PM 100: Planetary Ball Mill: Single station planetary ball mill in which the jar rotates about its own axis on a counter rotating sun wheel, so grinding balls are driven across the jar wall by Coriolis forces. That produces high pulverisation energy and short grinding times, down to below 1 µm and to 0.1 µm for colloidal grinding.
• PM 200: Planetary Ball Mill: Two station planetary ball mill for grinding two samples in parallel under identical conditions, or one sample with a counterweight. Jar sizes go up to 125 ml and the mill reaches below 1 µm, and 0.1 µm for colloidal grinding. Input energy can be measured, which supports mechanochemical work.
• PM 300: Planetary Ball Mill: Two station planetary ball mill taking jars up to 500 ml, with a higher sun wheel speed and a centrifugal acceleration of 64 g. The larger batch volume and higher energy input suit mechanochemistry and co-crystal screening as well as conventional fine grinding.
• PM 400: Planetary Ball Mill: Floor standing planetary ball mill with four grinding stations, taking a maximum batch of 4 x 220 ml, or eight samples with stacked jars. The speed ratio can be set to 1 to minus 2, 1 to minus 2.5 or 1 to minus 3, which changes the balance between impact and friction in the grinding action.
• TM 300: Drum Mill and Bond Index Tester: Drum mill for dry and wet grinding of soft, hard, brittle and fibrous material, with drums from 5 to 43.3 litres. Fitted with the ball or rod module it also serves as a Bond Index Tester, which is the standard way to quantify the grindability of ores and minerals ahead of plant design.
• TM 500: Drum Mill: Large drum mill for sample volumes up to 35 litres, grinding by friction and impact down to about 15 µm. It is the unit to use when a single sample is too large for a planetary or vibratory mill, for example in cement, mining and ceramics laboratories.
• XRD-Mill McCrone: Micronising mill developed specifically for preparing samples for X-ray diffraction. Forty eight cylindrical grinding elements arranged in the jar apply a gentle grinding action that reduces particle size below 1 µm while preserving the crystal lattice, which is what a diffraction measurement depends on.
• GrindControl: Pressure and Temperature Measuring System: Measuring system that records pressure and temperature inside a sealed grinding jar during a run and transmits the data wirelessly. It turns a ball mill into an instrument for studying what actually happens during grinding, which matters for mechanochemical reactions where gas is evolved or consumed.
• AS 200 basic: Vibratory Sieve Shaker: Entry level vibratory sieve shaker for dry and wet sieve analysis on 100 mm, 200 mm and 203 mm sieves. The electromagnetic drive produces a three dimensional throwing motion with angular momentum, so material is distributed evenly across the whole mesh. Amplitude and sieving time are set on an analogue panel, making it a straightforward choice for routine grading work.
• AS 200 digit cA: Vibratory Sieve Shaker: Standard vibratory sieve shaker with digital setting and electronic control of the sieving amplitude, so the same amplitude is held whatever the mass of the sieve stack. Suitable for dry and wet sieving of powders, bulk materials and suspensions. Sieving time is set digitally and interval operation can be selected.
• AS 200 control: Vibratory Sieve Shaker: Quality control sieve shaker with digital setting and control of every sieving parameter and memory for 99 standard operating procedures. The patented electromagnetic drive gives a three dimensional throwing motion, and sieve acceleration is held independent of mains frequency so results are reproducible between laboratories. It handles dry and wet sieving and carries a test certificate, and it can be calibrated.
• AS 300 control: Vibratory Sieve Shaker: Vibratory sieve shaker built for the larger 305 mm and 315 mm sieve diameters used for aggregate and construction material grading. It uses the same controlled electromagnetic three dimensional drive as the AS 200 control, with digital parameter setting and SOP memory. Dry and wet sieving are both supported.
• AS 400 control: Horizontal Sieve Shaker: Horizontal sieve shaker that moves the sieve stack in a circular motion in the horizontal plane. That action suits needle shaped, flat, long or fibrous particles and abrasives, where a throwing motion would give a poor separation. It takes sieve diameters up to 400 mm, so it covers coarse aggregate fractions.
• AS 450 basic: Vibratory Sieve Shaker: Large capacity vibratory sieve shaker for 400 mm and 450 mm sieves, giving up to 10 fractions in a single sieving run. Amplitude is set in steps rather than continuously, which makes it the budget alternative to the AS 450 control for laboratories handling large sample volumes of sand, aggregate and other bulk material.
• AS 450 control: Vibratory Sieve Shaker: The largest vibratory sieve shaker in the Retsch range, using controlled electromagnetic tapping technology to drive sieve stacks of up to 25 kg. It accepts 400 mm and 450 mm sieves and covers a measuring range from 25 µm to 125 mm, which takes in coarse aggregate as well as fine fractions. Amplitude is digitally set and held constant regardless of load.
• AS 200 jet: Air Jet Sieving Machine: Air jet sieving machine for fine powders that agglomerate or will not pass a mesh under vibration alone. A rotating slotted nozzle blows a jet of air up through the mesh to disperse the sample while a vacuum draws the undersize away, so each cut is made on a single sieve rather than a stack. It is used where a conventional vibratory shaker cannot disperse the material.
• AS 200 jet pro / AS 200 jet pharma: Air Jet Sieving Machines: Air jet sieving machines that combine sieving and weighing in one instrument, so the sieve does not have to be removed between fractions. The pharma version adds audit trail functionality for regulated laboratories. Both work on the rotating air jet principle for fine powders that will not disperse under vibration.
• AS 200 tap: Tap Sieve Shaker: Tap sieve shaker that mechanises the manual sieving procedure specified in several national standards, superimposing a vertical tapping action on a horizontal circular motion. It is used where a standard calls for tapping rather than vibration, and gives the reproducibility of a machine in place of hand sieving.
• Woven Wire Mesh Test Sieves, 200 mm / 203 mm diameter: Woven wire mesh test sieves in the 200 mm and 203 mm (8 inch) frame diameters that most laboratory sieve shakers are built around. The mesh is tensioned into a stainless steel frame and the sieves are supplied to ISO 3310-1 and ASTM E11, with inspection, calibration or certified quality options depending on the level of documentation a laboratory needs.
• Woven Wire Mesh Test Sieves, other frame diameters: Woven wire mesh test sieves in 100 mm, 305 mm, 400 mm and 450 mm frame diameters for shakers outside the standard 200 mm format. The 305 mm and larger frames suit aggregate and construction material grading where sample masses are high, while the 100 mm frame is used where sample quantity is limited.
• Perforated Plate Test Sieves: Test sieves made from perforated metal plate rather than woven mesh, used for the coarse fractions where a woven cloth would distort. Round and square apertures are available, and the sieves are supplied to ISO 3310-2 and ISO 5223 in 200 mm, 305 mm and 400 mm frame diameters.
• Test Sieve Accessories: Supporting items for sieve analysis, including collecting pans, intermediate pans, lids, spacer rings, sieving aids for materials that blind the mesh, and test sieve racks for storage. These are the consumable and ancillary parts that a sieve laboratory needs alongside the shaker and the sieves themselves.
• SieveCare: Test Sieve Cleaning, Inspection and Recalibration Service: Service programme for test sieves in use, covering ultrasonic cleaning, optical inspection of the mesh and recalibration against the relevant standard. It is how a laboratory keeps documented evidence that its sieves still meet ISO 3310 after months of use.
• PT 100: Sample Divider: Rotating sample divider that splits a bulk sample into equal representative sub-samples, so what reaches the analytical instrument reflects the whole consignment. It handles pourable solids with a feed size up to 10 mm and can be set to 6, 8 or 10 divisions depending on the head fitted.
• PT 200: Rotating Tube Divider: Rotating tube divider for powdered and granular bulk materials with a feed size up to 10 mm. The dividing ratio is set by the bottom cone fitted, giving one, two or three fractions, which suits laboratories that need a specific split ratio rather than a fixed number of equal parts.
• PT 300: Rotating Sample Divider: Rotating sample divider for dust free division and volume reduction of large quantities of powdered or granular bulk material, with a feed size up to 30 mm. It can be set to 4, 6, 8 or 10 divisions, or configured to reject part of the stream, which is how large field samples are cut down to laboratory size.
• RT 6.5 to RT 75: Sample Splitter: Riffle sample splitters that halve a sample by passing it through alternating chutes, the classic method described in DIN 51701. The series runs from RT 6.5 to RT 75 with slot widths matched to feed sizes from about 4 mm to 50 mm, and requires no power supply.
• RT 100: Sample Splitter: Riffle sample splitter with an adjustable slot width, so one unit covers a range of feed sizes instead of needing a different splitter for each. Slot width is adjustable from 12 mm to 108 mm and it divides the sample in two. It is built for laboratory and on-site use.
• TWISTER: Cyclone Mill: Cyclone mill developed for preparing food and feed samples ahead of near infrared analysis. A cyclone separator draws the ground material out of the grinding chamber quickly, which limits heating and moisture loss, both of which would otherwise shift the NIR result. Final fineness is below 250 µm.
• GRINDOMIX GM 200: Knife Mill: Knife mill for preparing food and feed samples, homogenising material that contains water, fat or oil as well as dry and fibrous samples. Two blade speeds allow coarse cutting then fine homogenisation in one vessel, and a boost setting raises speed to 14,000 rpm for the final stage.
• GRINDOMIX GM 300: Knife Mill: Large capacity knife mill taking batches up to 4500 ml, for food and feed samples that need to be homogenised in bulk rather than in sub-samples. All parts that touch the sample are autoclavable, which matters where microbiological testing follows the milling step.
• EasySieve pro / EasySieve pharma: Sieve Analysis Evaluation Software: Software that records sieve weights straight from a connected balance and produces the particle size distribution without manual transcription. It controls the sieve shaker, stores standard operating procedures and generates the grading report. The pharma version adds the record keeping features regulated laboratories require.