IKA T 18 brushless digital ULTRA-TURRAX disperser, 1 to 1,500 ml, 3,000 to 25,000 rpm, 0020102476

An overhead stirrer such as the IKA RW 20 digital needs its own stand to hold the drive securely above the stirring vessel. The IKA R 1825 plate stand (MPN 0003160000) is the entry-level model in the IKA stand series for this purpose, with a stable base plate on which the stirring vessel itself can also stand.With a rod height of 560 mm and a rod diameter of 16 mm, the stand has enough room to position the stirrer head above vessels of different heights, and takes up to 5 kg of load according to the manufacturer.CompatibilityOfficial accessory for the IKA RW 20 digital stirrer (MPN 0003593000), listed under stands on the corresponding accessory page. For higher demands, the same series also includes the larger models R 1826 and R 1827.Technical detailsHeight560 mmBase plate (W x D)200 x 316 mmRod diameter16 mmMax. load5 kgContents of the package1 x IKA R 1825 plate stand (MPN 0003160000).Individual requirements & procurement serviceFor mounting the stirrer to the stand rod we also carry the matching IKA R 182 cross clamp. Our procurement service also advises on the larger stand models R 1826 and R 1827 if more height or stability is required.

The IKA R 182 cross clamp (MPN 0002657700) connects the drive head of the IKA RW 20 digital at a right angle to the stand rod and fixes the stirrer at the desired height above the stirring vessel, without the position shifting during stirring.CompatibilityOfficial accessory for the IKA RW 20 digital stirrer (MPN 0003593000), listed under fixing elements on the corresponding accessory page.Technical detailsDesignCross clamp for mounting the stirrer to the stand rod at a right angleContents of the package1 x IKA R 182 cross clamp (MPN 0002657700).Individual requirements & procurement serviceFor the matching stand rod we also carry the IKA R 1825 plate stand. Our procurement service helps put together the complete stirrer stand assembly.

Perfect emulsions without unwanted air entrapment: the IKA Silentstream flow breaker In demanding product development, cosmetic formulation, food technology and chemical synthesis, high-performance dispersion is one of the most important, yet physically demanding, methods of sample preparation. When a dispersing tool based on the rotor-stator principle operates in an open beaker or reactor at speeds of 10,000 to 25,000 revolutions per minute, it not only generates enormous shear forces to break down the particles. At the same time, a massive rotational flow is generated within the liquid. This flow inevitably leads to the formation of a deep, crater-shaped vortex – known as a ‘trombe’. This vortex often extends right down to the stator’s suction ports. The fatal consequence: the disperser continuously draws in massive quantities of ambient air into the liquid medium. It is precisely to address this serious process-related problem that IKA has developed the innovative Silentstream accessory (MPN 0003754000). This intelligent flow baffle is the ultimate solution for reducing air ingress to an absolute minimum and significantly improving the quality of your dispersions. The negative consequences of air entrapment in everyday laboratory work Why is air in a dispersed sample so extremely harmful? The unwanted introduction of air through vortex formation causes three major problems in everyday laboratory work: Firstly, the entrained air leads to excessive foaming. Highly foaming samples (such as protein-containing solutions or surfactant-containing shampoos) overflow from the beaker, contaminate the workstation and result in the loss of valuable sample material. Secondly, microscopic air bubbles ruin the physical stability and texture of fine emulsions. A high-quality cosmetic cream or pharmaceutical ointment produced with air entrapments looks unattractive, feels dull on the skin and is prone to rapid phase separation (coalescence). Thirdly – and this is the most critical point for analytical purposes – constant contact with atmospheric oxygen at extreme shear rates leads to severe oxidation. Ingredients susceptible to oxidation, such as valuable vitamins, highly sensitive active pharmaceutical ingredients (APIs) or unsaturated fatty acids in food samples, are inevitably destroyed by this process, which completely skews the subsequent analysis. The physical solution: the flow breaker principle The IKA Silentstream tackles the physical cause of this problem head-on. The ring-shaped component is simply slid from below over the shaft of the dispersing tool (for example, the T 25 series) and positioned within the liquid medium. Thanks to its specially calculated, asymmetrical geometry, the Silentstream acts as a highly effective flow disruptor (flow disruptor). It disrupts the uniform rotational movement of the liquid generated by the rapidly rotating rotor. The liquid is slowed down by the Silentstream and redirected into a chaotic, predominantly axial flow. The result is absolutely astonishing: The rotation of the entire fluid mass comes to a near standstill, the surface of the medium instantly stabilises and the deep, air-sucking vortex disappears completely. The disperser can continue to operate at maximum speed and full grinding capacity, but now draws in only pure liquid instead of a destructive air-liquid mixture. Time savings and cost-effectiveness (TCO) in production In addition to the dramatic improvement in the quality of your end products, using the IKA Silentstream offers an invaluable economic advantage. If you have previously had to disperse highly foaming samples, you will be familiar with the problem of extremely long waiting times: you had to switch off the disperser after just a few seconds and wait for the voluminous foam to subside before you could continue the process. Alternatively, you had to add expensive chemical defoamers (antifoam agents), which distorted the chemical composition of your pure sample. With the Silentstream, these forced pauses are completely eliminated. You can complete the dispersion process in a single, continuous and rapid pass. This drastically reduces process times in your laboratory, increases daily sample throughput and significantly lowers the laboratory’s total cost of ownership for sample preparation. Occupational health and safety and seamless system integration A further positive side effect of the stabilised liquid surface is the substantial improvement in occupational health and safety. As the strong vortex and chaotic wave formation against the vessel wall are suppressed, the splashing of potentially hazardous, hot or toxic sample liquids out of the open beaker is extremely effectively prevented. The fume cupboard remains clean, and staff are protected. The Silentstream is manufactured from high-quality, chemical-resistant materials that easily withstand the common solvents, acids and alkalis encountered in everyday laboratory work. Thanks to its flow-optimised design, it can be cleaned very easily and thoroughly after use, leaving no residue, which prevents dangerous cross-contamination between different sample batches and ensures compliance with strict GLP guidelines. Invest in this unassuming yet technologically outstanding accessory to realise the full potential of your IKA disperser and produce flawless, air-free and highly stable dispersions. Technical data Function: Flow breaker / flow stabiliser (baffle) Mode of action: Prevents vortex formation and the ingestion of air Analytical benefit: Prevents oxidation of sensitive active ingredients and foam formation Quality benefit: Produces homogeneous, air-bubble-free emulsions and suspensions Health and safety benefit: Prevents the medium from being ejected at high speeds Compatibility: Designed for mounting on the shaft of IKA dispersion tools (ideally for standard tool diameters of the T 25 series) Handling: Can be slid onto the tool shaft without the need for tools Cleaning: Easy-to-clean, chemical-resistant surfaces Contents of delivery 1 x IKA Silentstream flow breaker (Important note: The essential IKA drive motor, as well as the dispersing tool and the stand system, are available separately and are expressly not included in this scope of delivery.) Individual requirements & accessories To make the best use of this accessory, you will need a high-performance drive such as the IKA T 25 digital or T 25 easy clean control, as well as the appropriate dispersion tool (e.g. from the S 25 N series). If, despite the Silentstream, you are working with extremely volatile solvents that must not be allowed to escape into the ambient air, we recommend switching to fully vacuum-sealed reactor systems with the corresponding KD dispersing tools. Our experienced procurement service will be happy to advise you on selecting the ideal tool sizes and establishing optimal Standard Operating Procedures (SOPs) for your foam-free sample preparation.