![]() One piece of magnetic material has its attachment to the other end of the flapper, and we position it near the electromagnet. The Flapper of the flapper nozzle has a connection to Pivot so that it can move up and down. Typically I/P converter converts 4- 20 mA current input into 3- 15 psi output.Īs shown in the diagram, as with the change of the current signal, the coil generates a magnetic field. I/P converter uses a principle of forces in electromagnetic balance to change electrical signals into pneumatic signals. The midpoint value of the electrical signal is 12 mA, which provides 9 psi. Also when the electrical signal is at its maximum limit (20 mA), the air pressure signal will be at its maximum (15 psi). The above graph allows for a selection of a current signal value in milliamps and determines the amount of air pressure the I/P converter should produce.įor example, when the electrical signal is at its minimum value (4 mA), the air pressure signal will also be at its minimum value (3 psi). Relationship between Current and Pneumatic signalĪ graph showing the relationship of current to air pressure. The air supply for the I/P converter should be about 20 psi so that the converter can control pressure between 3-15 psi. The pilot air pressure controls the main air pressure to regulate it at 3-15 psi. It is an electromagnetic coil, used to change the position of a flapper plate that controls a small amount of pilot air pressure. ![]() Working principleĪ typical I/P transducer is a force balancing device in which a current flowing through the coil generates the movement of the flapper plate. ![]() We call the converter I/P converter because it changes a current signal (I) to a pressure signal (P). ![]() The proportional electrical signal is generally a 4-20mA current signal, and the air pressure signal is generally 3-15psi. Signal RangeĪ current to-pressure (I/P) transducer converts an analog signal (4-20mA) to a linearly proportional pneumatic output signal in the range (3-15psi). In many cases, the device is mounted remotely on instrument mounts in pipes to reduce vibrations.We can mount it directly on the valve actuator when it is capable to withstand vibration.On pipe support or directly on the valve actuator.We can mount the I/P converter on the wall,.Therefore, we mount the converter in the pipeline. We should install the converter in a place where a technician can approach easily for attending repairs. I/P converter produces a faultless, perfect, reliable, and repeatable process of converting an electrical signal to a pneumatic pressure in many control systems. Its purpose is to convert the analog signal output of a control system into an accurate repeatable value of pressure to control pneumatic actuators/operators, pneumatic valves, dampers, vanes, etc. In some instances, the converter is a separate part mounted near the valve. Generally, the converter comes as part of the valve. Pneumatically operated control valves require a converter or transducer to change the proportional electrical signal to a proportional pneumatic signal. I/P converter translates the input 4 to 20mA current signal into equivalent output of 3 to 15 PSI pressure. I/P converter is a current to pressure transducer that works on the flapper nozzle method.
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