TS93G BC DC - Push. The dormakaba (formerly known as Dorma) TS93 Cam Action Door Closer system provides a high-quality architectural solution for all project application requirements. The TS93's technology, with its the heart-shaped cam, ensures exceptional ease of opening. This cam action door closer system is suitable for all fixing positions and can be mounted on both single- and double- leaf doors.. Adjustable sweep & latching speed. Adjustable closing force, delayed action & backcheck. Unique cam and roller design. Suitable for all fixing positions