Valco Valve Services SAS (formerly called Technor Valve Services and also SNRI Services) was founded in 1990. The idea was to create a specialized company in the commissioning, maintenance and repair of manual valves both on customer's sites and in house.

Then VVS extend its services to control valves and pressure relief safety valves. Today the main market of VVS is the maintenance of valves in the nuclear power plants during annual shut down.