EPI Industries Family of Companies, to which we belong, has obtained the Silver medal of the EcoVadis certification, one of the main corporate sustainability rating platforms worldwide. Lidering’s commitment to sustainability Lidering’s commitment to integrating sustainability into its areas of work, together with its constant interest in wanting to be part of a responsible industry for a safer future, has earned it the EcoVadis Silver Medal, now reaping the rewards of the work and effort made to achieve one of our corporate purposes “Helping the industry build a sustainable future”. One of Lidering’s goals, along with helping to create a…

Mechanical seals in contact with food must meet the demanding standards applicable to the sector, such as the FDA or EC 1935/2004 as two of the most relevant. How do these certifications apply to mechanical seals? EC 1935/2004 Compliance is obligatory, and it controls the transfer of substances from the materials from which the mechanical seal has been manufactured to the product with which it is in contact (milk, juice, chocolate, jams, etc.). The aim is to guarantee that all materials in contact with food are safe and meet the same quality requirements. FDA (Food & Drug Administration) The North…

Grinding mills for paints or pigments require special sealing systems, as these products are extremely abrasive. The grinding mills can be either vertical or horizontal. The grinding takes place in a closed chamber in which very hard pellets of various oxides, glass and silicates, among others, are added, which are agitated via an axle with “fingers” where the pellets collide and the required texture is achieved. These mills, both vertical and horizontal, have a pump with a mechanical seal which pumps the paint. This technology is used for the production of high-quality paints and varnishes. This mill grinds paint pigments,…

Some mechanical seal applications involve working at high temperatures, either with respect to the fluid product, or when it is the secondary fluid or barrier fluid. In these cases, it is possible that, in order to control the process, a high thermal dissipation capacity is required. For those applications, Lidering has an advanced liquid refrigeration system, the LHE. This is a multi-tubular heat exchanger designed in accordance with API 682/ISO 21049 standards. They are often used for API 21, 22, 23 or 41 assemblies, with the barrier fluid flowing via the interior multi-tubular circuit, and a second refrigeration fluid, for…

  Our knowledge and experience in mounting mechanical seals has enabled us to go one step further by being able to repair and improve the behaviour of pumps. At our facilities in Tarragona, we analyse pumping equipment behaviour and failures, and determine the most appropriate type of mechanical seal.     The main problems we usually find in the pumps we have to repair are: Leaks: they are the cause of half the problems we encounter that require improvement, according to statistics. In the case of aggressive chemicals, these leaks may pose a danger to people and to the environment….

Rotary seals are systems that are used to seal unions between fixed and rotating elements.     They basically consist of a connection guide element, a graphite bearing or bushing and a mechanical seal to seal the union. There are rotary seals for water, steam, oil and many other applications.     They usually function by letting the fluid to be sealed pass through the rotary connection, which is known as a one-way rotary seal. There are also seals that permit the fluids to pass through in both directions, without the incoming fluid being mixed with the outgoing fluid. This…

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…

Water is the most important fluid not only for life but also industry in general. Refrigeration systems, concentrators, evaporators and reactors need either water or steam in order to function correctly. This is why, nowadays, it is essential to make good use of hybrid resources, which require specific solutions. There are many industrial areas that also work with water as a main fluid, and some of these can acquire great economic importance. Out of all water-related industries, the most important might very well be hydroelectric generation plants, desalination plants or pumping stations. One of the most characteristic factors of these…

For applications where working under high pressures is required, Lidering has developed the mechanical seal LSC10B-FQ, which has certain characteristics that provide it with excellent stoutness and reliability. These kinds of seals are usually used in power generation industries, not only thermal plants but hydraulic plants as well. They can also be found on the oil and gas industries. How does the mechanical seal LSC10B-FQ work? This cartridge seal has a special seal assembled inside in order to work under high pressures: a balanced multispring seal. The balance of its friction faces is designed to reduce their wear when under…

From its start more than 40 years ago, Lidering pursues constant improvement, quality services and client satisfaction, and it also respects and endorses the main European and worldwide normative. In this desire for constant improvement, Lidering has joined as a full right member of the ESA, European Sealing Association, as of the past March. What is ESA? ESA is a non-profit commercial association, which represents fabricants and suppliers of sealing devices and material. ESA members form the vast majority of sealing industry in Europe. Just like Lidering, ESA bets on safety, energetic efficiency and environmental protection. Its goals are: ·…

When the value of a mechanical seal is high and the conditions of its parts allow it, there is the possibility to repair it, thus significantly saving money on the system’s maintenance. Repairing operations on mechanical seals The operations carried out during the repairing of a mechanical seal mainly are as follows: Rectifying/lapping of friction faces. Sanitation/fabrication of metal components. Replacing of secondary seals. Rectifying/lapping of friction faces in mechanical seals Friction faces in mechanical seals usually are the most damaged parts after a certain time of use. In order to repair them, they have to regain the flatness and…