Various types of valves are used in industry as shut-off devices. They are suitable for gaseous and liquid media. A distinction is made between cocks, gates and valves. Cocks isolate a pipeline quickly, acting transverse to the flow. A quarter revolution is sufficient for full actuation. Valves regulate the flow and require several turns of the spindle for full opening or closing. Gates are not intended to seal off the pipeline completely, but serve to restrict the flow. When one of these fittings is combined with a driving mechanism, the resulting control device is known as an actuator.
RT 395 presents the various types of fittings. The test stand investigates the operating response of a segmented ball valve (corresponding to a cock type fitting), a gate (butterfly valve), a pneumatic control valve and a pressure reducer. The control panel allows the necessary electrical and pneumatic parameters to be set  to test and calibrate the valves. Instruments indicate pneumatic pressures, voltage and current. There is a vice on the workbench for maintenance and assembly work. The workbench also incorporates the necessary tools, and small parts such as seals, for the carrying out of testing procedures.

An MP3 player can be used to play back different valve noises.

The comprehensive instructional material provides a description of all the components and of the complete system, including all drawings, and precisely sets out the assembly and maintenance operations involved.