What are Valve I/P Transducers?

by | Sep 6, 2018 | Services, Consulting & Training, Valves, Actuators & Regulators

Jim Cahill

Chief Blogger, Editor

As we continue to see a generational shift in the manufacturing industries, I like to highlight educational videos developed across the Emerson business groups.

Our group managing Fisher Valves & Instruments products has recently posted a 2:51 YouTube video, What are I/P Transducers?

This video, developed by the Valves, Actuators & Regulators educational services team, opens by defining the “I” and the “P”. The “I” stands for an electrical current signal and the “P” stands for a pneumatic or pressure signal.

The I/P transducer converts an electronic signal, typically from a control system, to a pneumatic signal used to control a valve. This signals from the control system are typically analog signals in the range of 4 to 20 milliamps. These signals are not compatible with control valves outfitted with pneumatic actuators.

Beam, Nozzle & Flapper assembly on electro-pneumatic, I/P transducerThe video displays an animation showing how this process works converting an electrical input signal to a pneumatic output signal to drive the valve’s actuator. Starting at the 1:18 mark of the video, the animations shows the process of how the 4-20mA electrical signal, electromagnets and beam, nozzles and flappers assemblies in the I/P transducer convert the electrical signal into 3-15psig pneumatic signal.

The electromagnets control the movement of the beam to open and close the nozzles and flappers to control the pneumatic pressure within the 3 to 15 psig range.

This pneumatic signal goes to the valve actuator which controls the position of the valve in a range from close to open.

You can learn more about the training available for valves, actuators and pressure regulators on Emerson.com.

Also, join us in San Antonio, Texas, October 1-5 for the Emerson Exchange conference for some great Educational Services courses, such as Blended Learning: FIELDVUE Digital Valve Controller using ValveLink.

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The opinions expressed here are the personal opinions of the authors. Content published here is not read or approved by Emerson before it is posted and does not necessarily represent the views and opinions of Emerson.