The new Southco CA hinge series with torsion spring was designed specially for ensuring secure fixing of very heavy flaps or plates. The weight of the load itself is balanced by a torsion spring acting as a counterweight. All opening and positioning movements are carried out without great effort and without the assistance of extra components. Its space-saving installation from outside means that the CA hinge is ideally suited for use in medical engineering and the food industry as well as in all electrical machinery with heavy covers. There are many different heavy-duty versions and models available, and they can also be modified to suit the customer's specific requirements.