AC or DC Solenoid Dirrectional Valve

Hook it up and see if it works. 24V isn't gonna hurt anything if it's rated for something else. You had no clue when you bought it, right?

Are you familiar with the saying "pig in a poke"?

tendem wrote: "Can i use the resistance meter to guess it is DC 24 V."

Probably, but I would consider these approaches:

* Can you identify the original manufacturer of the valve? If so, look into their data (sheets, catalogs, whatever) or contact them to find out what options existed for solenoids when the valve was new. Then get the specs on those solenoids (like DC resistance)--that might be distinctive enough to let you use a resistance meter to guess the design voltage for the coils. (I'm guessing that coils were rated the same for AC and DC (i.e., one coil was sold for 24 volts, AC/DC, but the information from the oem should tell you that.)

* If the coils you have are not for 24 volt DC, but that was an optional coil voltage available at the time of purchase, I would assume (I know) that you could buy replacement coils for the valve rated at 24 volt DC. Further, if the resistance did not tell you for sure which solenoid you have, you could simply buy new solenoids for 24 VDC.

Hook it up to 24v AC, if it chatters, it is DC. No harm done!

Disconnect the solenoid. Energize the wires that we're going to the solenoid and measure the voltage across the wires. That's the voltage of the coil.

Usually, blues wire represent 24Vdc, orange 24Vac, and red 120Vac