Flow transmitter
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What is the difference between 24VDC and 220VAC for powering flow transmitters and associated solenoid valves, and which one is better?
How to combine a flow transmitter with a solenoid valve? Electromagnetic valves are generally used in the cylinders of shut-off valves; it doesn’t matter whether it’s 24V DC or 220V AC – it depends on the power supply available there. Personally, I recommend using 220V AC as it results in lower current consumption!
It should be some kind of interruption in the traffic, right? Solenoids are usually installed on-site; in chemical companies, explosion-proof versions are generally required. It is best to use a 24V power supply. If explosion protection is not required, then it doesn’t matter. But one thing to keep in mind is that the safe voltage level is below 36V; therefore, 24V is the most reliable choice
You mean an electromagnetic flowmeter, right? It requires external power supply of 24VDC and 220AC. Depending on the operating conditions, it is recommended to use 24VDC
If the distance is large, 220 volts can only be used; using 24 volts results in significant voltage loss. I remember consulting the flow meter manufacturer, who suggested that 220 volts is better
The question is a bit unclear; transmitters have nothing to do with solenoid valves. Regarding transmitters alone, there are two-wire and four-wire types. The two-wire type relies on a DCS card or a secondary meter with built-in power supply to provide a working voltage of 24VDC, while the four-wire type can use either 24VDC or 220VAC as its power source. The choice between these options doesn’t make much difference; it depends on the conditions at the installation site. Solenoids are generally used to control actuators; when selecting a power supply, distance and explosion-proof requirements need to be taken into account.