How does an AC solenoid valve works???

Posted in the Electrical Engineering Forum

Helder Silva

UK

#1 Jan 5, 2009
Hello!!!

I know how a DC solenoid valve works. Applying the same principles to an AC type the electro valve would be always opening and closing, since the electrical current reverses each half cycle.
How can an AC solenoid valve be kept always open or closed dependent on its operation?
What is the architecture of an AC solenoid valve (I never opened one)?

Best regards and an happy 2009
Mark

United States

#2 Jan 26, 2009
I'm trying to figure this out as well. This was an interesting article that I found on the subject:

http://www.entrepreneur.com/tradejournals/art...

Hope that it helps.
Helder Silva wrote:
Hello!!!
I know how a DC solenoid valve works. Applying the same principles to an AC type the electro valve would be always opening and closing, since the electrical current reverses each half cycle.
How can an AC solenoid valve be kept always open or closed dependent on its operation?
What is the architecture of an AC solenoid valve (I never opened one)?
Best regards and an happy 2009
khairul

Puchong, Malaysia

#3 Mar 25, 2009
hello,

im khairul from malaysia..
im a new comer in valve engineering.so,i need some help to describe some good information to me.
Actually, i have a job offer from one companies in malaysia,this companies plan to growth the bisness in valve area.So, im one the team to handle about it...I need a help to know.how can i start to measured it.
sebastian

Toronto, Canada

#4 Jul 16, 2011
I'm thinking it has a diode in it that can support the load of how much current is passing through and can prevent it when it travels the opposite direction. so if thats true it will also support dc one way.
Ali YUKSEL

Istanbul, Turkey

#5 Jul 26, 2012
Did anyone find how an ac solenoid valve works? I just wondering that why the valve always open or close when we apply ac signal. Cause sign of ac signals always change each period. and magnetic field always change too...
Mads

Billund, Denmark

#6 Jun 18, 2013
Interesting subject.. It is correct that if you put an AC-current into a solenoid valve it will actually "open and close" all the time, because of the frequency.. But the Ac-solenoid-valves are a little bit different from DC-solenoid valves. There is an extra coil inside Ac solenoid valves. This extra coil will angle the current 90 degrees compared to the main coil. In that way it will reach its max current when the current is 0 in the main coil. Because og this the magnetic-feild will keep its poles stedy.
I hope this will be a help..
Abe Siag Palestine

Ramallah, Palestinian Territory

#7 Sep 19, 2013
The AC solenoid valve has a split Iron tube that is inserted between the coil and the valve stem to prevent the valve from oscillating.

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