1. DC 24v solenoid valve needs DC power supply, 220v AC solenoid valve does not.
2. DC 24v solenoid valve, low voltage and high safety factor, 220v AC solenoid valve, high voltage is easy to cause safety accidents.
3. If the power of the DC 24v solenoid valve and the 220v AC solenoid valve are the same, the current of the 24V DC coil is about 9 times that of the 220v AC coil. 220v AC solenoid valve drive current is small.
4. There is a short-circuit ring in the coil core of the AC 220v solenoid valve to reduce vibration, and the 24V DC solenoid valve does not have a short-circuit ring.
5. Once the coil of the 220v AC solenoid valve is stuck in the valve body mechanism, or the pull-in stroke is too large, resulting in poor pull-in, or the short-circuit ring falls off or opens, noise will occur, and the coil will quickly heat up and burn. So we often see the 220V solenoid valve coil burned out.
6. When the AC 220v solenoid valve coil is energized, the noise is loud, and the DC 24v sound is much smaller.
7. The DC 24V solenoid valve has a small suction at first, but it is much larger after the suction and the suction is relatively stable. The suction of the 220V AC solenoid valve is alternating with sound.
Summary: In terms of safety, we prefer to choose 24v DC solenoid valve. We only choose AC solenoid valve when there is no DC power supply! When we design the solenoid valve circuit, try not to leave the solenoid valve energized for a long time. The coil will generate a lot of heat when it is energized for a long time and it is easy to burn.