Anyone have experiences using AC valve coils on DC. I just built a squirrel sprayer(water jets to keep the pests out of the bird feeders) using sprinkler valves and didn't want to bother with 24vac to run them. Figured AC impedence is higher than DC resistance, so I tried lower DC voltage, a 12v battery.....works great.
Next thought....Stainless steel ITT solenid valves (UL listed) on the shelf from old project with 120vac coils.......will they work on my 24vdc system?? yes, and they work on 12vdc. Don't get warm on 24vdc, so I think this will work for FOGBANK .
Anyone done this successfuly or have xperience doing this??
Next thought....Stainless steel ITT solenid valves (UL listed) on the shelf from old project with 120vac coils.......will they work on my 24vdc system?? yes, and they work on 12vdc. Don't get warm on 24vdc, so I think this will work for FOGBANK .
Anyone done this successfuly or have xperience doing this??
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Portland
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Re: AC vs. DC solenoid coils
Tue, May 6, 2008 - 6:11 PMIn a water type situation without potential harm in failure, sure. It won't last forever, and will probably fail big time at some point.
If you're working with something that can cause potential harm or death to people in a failure scenario, use the proper coil with the proper voltage with the proper solenoid at or below its rated capacities and limits. I hate the concept of hospitalizing and/or burying a bunch of bystanders because someone wanted to save a hundred bucks.
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Re: AC vs. DC solenoid coils
Tue, May 6, 2008 - 6:21 PMOn the A/C D/C coil design....
A/C impedance is not nessecarily higher or lower in a coil. Depends on the size of the windings, number of windings, size of the core, voltage potential, and duty cycle it is designed for, etc.
its hard to judge an equivalent DC voltage that will operate the coil correctly. The resistance of the coil is variable with current flow. That is: the coil resistance changes from its static unloaded state and increases when current flows.
Remember that with A/C, the current flow starts and stops 120 times a second. With D/C the current flow peaks when the switch is energized and then decreases as the field builds.
Two totally different design paramenters.
