The years passed, and even the pumps up to the 70s had some technical limits: they were bulky, noisy and difficult to maintain. Therefore Bertolini, ready to accept the indications that came from the market, turned towards the design of more compact, handy, silent and structured pumps in such a way as to facilitate the replacement of parts subject to wear (e.g. suction and delivery valves inspectable by the ‘external). The first 3-piston high-pressure pumps for industrial use were designed in Bertolini in the early 70s, because Bertolini was also the birthplace of competing companies on the market today. The company has always continued its activity by designing patented and non-patented technologies,