The acquisition of Johnston Sweepers by German firm Bucher Automotive, a manufacturer of compact and truck-mounted sweepers, will be completed by early April.
Johnston Sweepers operates specialised production facilities in the UK, Denmark and Australia and employs around 800 people.
It supplies a range of sweeping equipment to customers that include local authorities and waste contractors.
Johnston Sweepers marketing director Steve Douglas said: "It is rare and exciting when two such successful companies combine resources to become a global leader. We believe that this will provide many benefits to our customers and distributors."