what is the Operation of Current to pneumatic signal converter?
Operation of Current to pneumatic signal converter is described in the video.
First of all this current to penumatic signal converter is a field mounted instrument that converts a DC milliAmps input signal to a proportional pneumatic output signal by giving supply air by air filter regulator to the signal converter.
This output signal can be used to operate pneumatic devices such as dampers,valve actuators, etc., or as the input to various pneumatic instruments.
Do you know how a current to pneumatic signal converter operates?
A dc milliAmps input signal is converted to a proportional pneumatic output signal by this following way.
A coil positioned in the field of a permanent magnet reacts to the current by producing a tangential thrust proportional to the input signal flowing through it. The thrust, acting through coil flexures, varies the gap between a flapper and a nozzle. This causes a change in the output pressure of the relay, which is also the converter output pressure. This pressure is fed to a feedback bellows which exerts a force on a feedback flexure to move the nozzle and establish a throttling relationship between the flapper and the nozzle. Thus producing the output pressure according to the input milliAmps.
This is the operation of current to pneumatic signal converter
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