The squaring of the circle does not have to be limited to the opening angle of 90° for shut-off valves, but other rotating angles can be individually set.
The bar-agturn actuator series with angle extension up to 180° can be used for valves that have an operating range beyond the opening angle of 90°, such as 3-way valves, pipe diverters, or flap boxes in industrial applications, in bulk material handling and water treatment at System and valve manufacturers; Pump and blower manufacturers; and Plant manufacturers.
A typical process is the use of a butterfly valve for throttling, which must never close completely but must remain open by at least 10° to 15° to maintain the pump function.
Extended end position adjustment is also necessary for 3-way Y-type valves. Despite different switch shapes, the same actuator model can be set up and individually adjusted to the outlet angles.
Optimum adjustment of the fitting is achieved on the bar-agturn with the aid of a newly developed, patented adjustment cam as well as one adjustment screw each for the end position adjustment.
With this cam, the adjustment range has been considerably extended. The setting angle of the drive can now be limited up to 20° before the respective nominal end position. In addition, the special shape of the setting cam ensures that the optimum pressure point is exerted on the setting screw at every set angle. Transverse forces that could damage the screw are thus excluded.
The valves are protected, as caking of the medium is prevented and opening against the process flow is not necessary. Another positive aspect is the reduced loss in the batches due to continuous processes.