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Hi
How can we determine the amperes required for a coil to energize its coil and to hold the piston?
I have Chinese 12V Solenoid valves but without label.
I need to select proper power supply for them.
View attachment 41773
It is hard to "assume" from a picture with nothing else in it to determine scale, but supposing the pipe diameter is no larger than 1" to judge scale, I would guess that it shouldn't need 2A, probably around 1A to 1.5A and a 3A PSU would be plenty with some margin.
u bought a solenoid without knowing the spec's ??
go back to where you bought it
The "correct amperes" is whatever the solenoid current is when 12 V DC is applied. Put a multimeter in series with the coil and select the 10 A range. Energize the coil from a 12 V DC supply (such as a fully charged automobile battery) and observe how much current is supplied to the coil. Alternatively, measure the un-powered coil resistance in ohms with a multimeter and divide this into 12. The quotient is the current in amperes required to operate the solenoid. See @Minder's post #4 above.I have also checked it is working on 12V but I need to know the correct amperes.
I bought it from a local hardware store.
He confirmed that there is no label on it but it is 12V DC. I have also checked it is working on 12V but I need to know the correct amperes
Is the photo you posted the actual part that you have? If so, please photograph the round metal tag underneath the nut and let us see what is written there. If not, why did you post this photo?
No, I just copied it from the net (to save time).
Both of my parts are almost identical to it. except that both have plain round tag without anything mentioned.
so that photo you supplied ISNT you unit … can you see how that doesn't help us help you
It is always good to supply the correct info
We tried this solenoid at various DC voltages and found we could actuate it down at 6VDC (although it was a little slower to open). Here is the current draw table for various voltages.
Voltage: Current
6V: 1.6 A
7V: 1.86 A
8V: 2.0 A
9V: 2.3 A
10V: 2.5 A
11V: 2.7 A
12V: 3 A