Check up to five results to perform an action.
Rexroth Actuator Positioners are compact, pneumatically operated devices used for accurate positioning of engine governor control arms, butterfly valves, carburetors and other low-force mechanisms.Emerson Aventics offers three types of positioners: diaphragm with radial motion lever, diaphragm-linear, and cylinder-linear. All three models use the same basic principle of applying a predetermined air pressure (supplied by a Aventics Type "H" Controlair® Valve or Type M PLUS™ proportional pressure control valve) to act on a diaphragm or piston to compress a positioning spring. The actuator lever then assumes a specific position which corresponds to the applied pressure and to the control valve handle position.Our Actuator Positioners feature light-weight, strong, die-cast construction with a minimum of connections. Years of performance in heavy construction vehicles, drill rigs, marine applications, and other types of installations have proven them to be rugged and highly dependable.AB-1Basic AB Type Two-Direction Positioner is made from the basic AA Type and the addition of a separately controlled stop cylinder.BA-1Basic AA Type, Single Direction Positioner with a "vernier" feature added by the use of an additional diaphragm that is controlled separately. (An H-4 Controlair® Valve is a great combination.) This allows for exact positioning and very fine control.