Agitators are of the most common industrial systems. They can be used in practically any sector, with the chemical and food industries being those in which this type of machinery is used most. There are many agitator/mixer designs with a greater or lesser degree of complexity, but they all have a common basic concept; they are used in tanks or similar devices into which different substances are poured and stirred using a rotating paddle system to mix them. Reactions usually occur between the added products, and for this reason these mixtures/reactions must remain under controlled pressure and/or temperature conditions. Again,…

As already seen in the previous blog entry, in an agitator/reactor, it is very likely that a cartridge seal will operate under dry conditions, as the fluid/product is at the bottom of the system and hardly enters into contact with the seal. In such conditions, it is essential to use a lubricant other than the product fluid. The LDC40 cartridge seal is a double seal that facilitates the use of a secondary fluid (barrier fluid) to lubricate the seal. Another benefit of using a secondary fluid is that the maximum linear operating speed of the seal is higher than that…

There is a great variety of brands and models of pumps that, due to their design and structure, allow the assembly of different types of seals and other sealing systems like packing. There is a tendency, in such cases, to adapt the pump so a mechanical seal or a cartridge can be used without it being necessary to make major modifications to the housing. Nevertheless, some of these brands, due to their special structure, which is specifically designed to work in particular applications, use special designs of mechanical seals made to fit in the housing of these pumps. This type…

To manufacture the paper used in high-quality prints like magazines, catalogs, etc., a special treatment called stucco is required. This process consists of adding one or more layers, based on the quality, of a special mixture of Calcium Carbide (70%), Latex (20-30%) and other substances like starch and NaOH, to the finished paper. This mixture is transformed into a viscous and adhesive substance that must be applied in very specific concentrations and dry in short spans of time, so that the paper does not stick when winded and forms a solid cylinder of unusable material. The properties of this substance, added…

Le magazine Eureka Flash Info consacre un article à Lidering dans son numéro spécial pompes (nº91). Eureka Industries, fondée en 1988 est leader en formation technique. Cet organisme forme des équipes spécialisées dans les process industriels des secteurs de l’eau, l’environnement, la chimie, l’alimentation, la pharmacie et l’énergie. En 1991, cette entreprise familiale décide de lancer un magazine technique sur le thème des équipements pour les fluides liquides et gazeux. Avec aujourd’hui près de 40000 lecteurs tous ingénieurs ou techniciens dans des industries de process ou dans les secteurs eau énergie, ce magazine est devenu incontournable : il tient les professionnels informés…

The Productive Centre in Reus has been Saqr-ATEX certified. This certification allows us to carry out repairs on non electrical equipment with ATEX certification of any type and category: mechanical seals, cartridges, pumps, agitators, etc.; Area 0, 1, 2, 20, 21, 22, etc.; while maintaining the same level of ATEX certification. As a reminder, the ATEX certification is applied to those devices that work, or can at any time find themselves working, in potentially explosive atmospheres. The ATEX normative classifies these situations using Areas, thus we have: Area 0 for applications in which the presence of an explosive atmosphere is…

Lidering has recently inaugurated the renewed facilities of his Mechanical Seals Productive Centre. The new facilities dispose of almost 1.000m2 of productive area, which makes possible the incorporation of automatic machinery. This will considerably amplify production capacity and allow for the execution of our processes in less amount of time. We are counting with machining lines that include lathes and conventional milling machines, as well as an automatic CNC line with milling capacity for serial production.  We have widened the isolated work area of graphite, incorporating a milling machine for the sole purpose of machining this particular material. The room…

Companies that are really committed to the improvement of their processes are all betting on investing time and effort in their staff’s training. Lidering and Epidor Technical Distribution actively share this principle, and following a joint activity programme, they imparted a seminar on Mechanical Seals, materials and specific applications of the iron and steel industry in SIDENOR ACEROS ESPECIALES, in Azcoitia. 15 people involved in the maintenance service attended this seminar. During the session, different types of materials available for manufacturing friction surfaces in mechanical seals were analysed according to the specific needs of each application. One of the improvements…

When a process implies working with chemically very aggressive fluids, our systems’ components must be prepared for it, including mechanical seals, thus avoiding their becoming of the weak link in the installation. Acid and alkaline solutions in very high concentrations are common both in the chemical and food industries. In the automotive sector, for example, decanting pumps of acids, such as hydrochloric and sulphuric, can be found as mordants to strip metal plates destined to bodywork. In the paper industrya multitude of alkaline, such as sodium hydroxide, and acid substances, like chlorine dioxide and hydrogen peroxide, are used to obtain…

It is known that a mechanical seal is a complex device in its design, assembly and functioning. Nevertheless, its efficacy does not often depend on any of the aforementioned points but on another one, which is not always considered: the state of the installation of mechanical seals for pumps. The state of the installation and the shaft where the seal must be assembled is determining for the mechanical seal’s proper functioning. It is common for these components of the pumps to suffer from wear and damage at the time of the repair. The first element that must be revised to…