Ahead thanks to own technologies

Welcome to Company "LEG" Ltd. - the leading manufacturer of carbon-based materials in Ukraine.


Our site will help you get acquainted with our manufactured carbon materials and products. Our experts will select the material according to your requirements and make of it high-quality precision products.

Why you should choose us:

  • Own production with full quality control, starting from raw material to finished product. The company implement a quality management system certified for compliance with ISO 9001;
  • Only high-quality raw materials from regular and reliable suppliers from all over the world;
  • Partnership with Science and Technology Center, that allows us not only to improve product quality, but also expand the range of materials and products, as well as improve own technologies;
  • More than 20 years on the market. Our regular customers are manufacturers of large electrical machines, instrument-making plants, glass and repair works plants, etc .;
  • Successful periodic independent testing of our products;
  • Individual approach to each client;
  • Willingness to participate in the development of new mechanisms and conjugated products.

Contact with our managers and you will receive professional advice and the best solution according to your requirements.


News
Serial production of material grade LE34 and brushes of it for turbine- and hydro-generators has been mastered
Serial production of material grade LE34 and brushes of it for turbine- and hydro-generators has been mastered
06.04.2020
The brushes of material grade LE34 manufactured by Firm LEG ltd. have been tested and are successfully used at Zmiev thermal power plant (PJSC Tsentrenergo) in brush and contact joints of turbine-generators.The material grade LE34 has run a full cycle of tests to demonstrate a long operational lifetime, unipolarity, stable operation at higher vibration of contact rings and complete absence of sparking.In comparison with material grade ЭГ-4, which is generally unstable in high-power machines, LE34 grade shows a stable operation under more severe conditions. The tests have shown, that LE34 material can not only substitute for ЭГ-4, but also enhance the service of turbine-generator brush and contact joint due to more stable rates.The average wear of brushes grade LE34 in high-power electric machines (200-300 MWth) is 3,5 mm/1000 h, while the brush material grade LFC554 (recommended by manufacturer Mersen (former Carbon Lorraine) in exchange for ЭГ-4) has an average wear of 3,8-5,0 mm/1000 h at 80-160 MWth power (source http://inkommash-novosib.ru). Technical specifications of brushes made of material grade LE34* and ЭГ-4**: Brush grade Specific electrical resistance, mkOhm•m Voltage drop on a pair of brushes, V Coefficient of friction, max/average Wear at SCC installation, mm, not moreLinear velocity, m/sec, not moreCurrent density, А/sm2, not more  Suggested specific pressure on a brush, kPa LE34 from 6 to 16 from 2,0 to 3,6 0,19/0,11 0,50 80 20 from 15 to 25 ЭГ-4from 6 to 16from 0,8 to 2,00,25/н.д.0,6060 12from 15 to 25 Well-functioning production cycle allows Firm LEG ltd. to manufacture graphite electrical brushes of material grade LE34 in any design and number.Application of electrical brushes LE34 with brush holders made by Firm LEG ltd. improves operational quality of rotor contact rings, prolongs their operational service and maintenance interval, reduces the influence of human factor on the quality of generator brush joint maintenance. *Specifications according to technical conditions TУ У 27.9-14111810-006:2018 * Specifications according to technical conditions ТУ 16-88 ИЛЕА.685211.037ТУ
Today Company LEG ltd. celebrates 27th anniversary of its foundation
Today Company LEG ltd. celebrates 27th anniversary of its foundation
01.04.2020
Our congratulations to a friendly, united team of talented and high-experienced coworkers on this great day! We with you to progress and move forward and upward! Never stop at what you have achieved. Stability, reliability and сonfidence in the future! Ahead thanks to own technologies!
The positive results of works of  the electric brushes were obtained with upgraded polymer overlays NK-8
The positive results of works of the electric brushes were obtained with upgraded polymer overlays NK-8
21.08.2018
Dumper rubberized overlays NK-8 had successfully tested on Zmiev HES. Undoubted effect were marked at reduction of vibrations in compared with metal overlays NK-1 and NK-2.

щетки для электрических машин

Brushes for electrical machines

Production of all range of carbon brush materials: EG, BDH, MG. For rotational motors and generators, machines without collectors, electric transport.
 
brush holders

brush holders


Production of brush holders one of the key elements of electric machines
 
Скользящие контакты

Sliding contacts

Production of sliding contacts for electric transport: carbon trolleybus inserts, pantagraph strips.
 
печи и углеродная оснастка

Furnaces and carbon mounting

Production of carbon heating units for vacuum furnaces, graphite heaters and current collectors, carbon mounting, heat insulators.
 
графитовые изделия

Graphite materials and products

Production of antifriction materials, seals, graphite crucibles, compressor blades, graphite dies and crystallizers, blocks for electro-erosion, products for glass industry.