The KOLANKY Group was founded in the 1980s. The Group started with oilfield chemicals. After more than 30 years of development, the Group involves Three businesses, one is oilfield chemicals,other is Brazing Alloy welding materials of HVAC Industry and EV Charger.Please click on the link for details.
Brazing Alloy Welding Material of HVAC Industry
Started in the 1980’s, we are the famous Chinese professional company, which are specialized in research development and sale brazing materials, we are the member of China Welding Association and Henan Welding Professional Committee Syndic Unit.
We started out from the production and R&D of oil field chemicals since 1995.After more than 20 years of development and technological innovation, now we have developed two main product range drilling fluid additives and oil cement additives now.
As a professional EVSE manufacturer, ISIGMA focuses on providing customers with professional charging equipment that is safer, more efficient and more stable.and mainly engaged in all kinds of connectors, charging products series, high-voltage wire harness series products, and it is also a high-tech intelligent manufacturing enterprise of core components in new energy electric vehicles integrating R&D, production and sales.