was founded in 1969 as a Company specialized in the DESIGNING and MANUFACTURING of ball valves from 1/4" up to 36".
It became a worldwide leader in industrial & hydraulic field, GEMELS since 2010 started to focalize and to invest more and more also in OIL&GAS field. In the middle of North Italy, GEMELS is located in Trescore Balneario, Bergamo, less than 50 km from Milan, with an area of more than 10.000 mq.


  • The excellence in quality, our company’s true and personal mission towards the continuous innovation and improvement on every front, that allows us to work with sectors and clients of high position and importance.
  • Reach the goal together with developing personally and professionally our partners and preserving a safe and friendly environment.


  • To be proud to present our company founded on solid and honest grounds that succeeded to expand at international level and become a worldwide leader in ball valves production.
  • Transmit to our partners every year new and more reliable products offering various, technologically advanced and Lean solutions for any application.
  • Propose the best quality-price ratio in a competitive market in continuous renewal.
  • Share the principles of continuous improvement and the experience that Gemels pursues for our products to our partners.


    The principles of TPS (Toyota production system) are the basis of GEMELS philosophy, based on lean production, on 5S, on excellence in quality and on a process of continuous improvement (kaizen 改善).
    Thanks to these strong believes, GEMELS has specialized over the years in the design and manufacture production of valves for special & critical applications, providing customers with lean solutions and customized valves. Thanks to the rigorous study of advanced and innovative solutions, GEMELS also obtained 2 patents in Italy and Europe.


    To ensure an additional quality guarantee, at the beginning of 2017 it was installed in our plant a new automatic assembly line for the mounting and testing of the ball valves. This machine permits the assembly and the relative test, of all the standard valves up to 1”. For each assembled valve it is done an automatic report that shows every step of the process, thanks to the pictures shot by the cameras placed in each station of the machine. For additional information about this automatic assembly line, it is possible to view the video in the gallery section.
    Besides this machine, there is the ‘historic’ manual assembly line for the assembly of the valves with bigger DN and special models.


    With a warehouse of 2.000mq, divided between components and finished product, Gemels is able to guarantee a wide range of products with fast delivery.


    The production area, where GEMELS produce more than 50.000 ball valves per month, consists of more than 40 machines including automatic numerical controlled machines and semi-automatic ones, among which CNC, lathes, transfers, boring machines, machining centers etc.
    These technologies and the high qualified personnel help GEMELS to achieve the quality standards and excellence, obtaining the required technical characteristics and being trustworthy in the field. All the production is guaranteed 100% MADE IN ITALY.


    The quality department guarantees that all the production follows all the required standards, performing rigorous tests before and after the assembly of all the production. After the internal assembly, all valves are 100% tested using specific test benches. Moreover, in our Internal Laboratory GEMELS qualified personnel tests the life of the valves, simulating with special machineries (burst test, impulse test, saltspray test, climatic room, tridimentional check, microscope, hardness gauge, bidimentional gauge) critical applications and conditions to constantly ensure the highest quality.