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I was searching and surprisingly unable to find a simple continuous duty electric water valve? Below is my requirement.

We get water from government. They release water only every 6th day., for few hours. So most of the time our manual water valve is closed. Every 6th day, we manually open and keep the water valve opened for few hours (typically 6 to 8 hours), because the timing is not consistent.

I want this process to be automated. If I have electric valve, I could simply connect to internet and schedule this. Only problem is, I see that solenoid valves cannot be activated for hours together. So I need a one (I don't care if its solenoid or anything, just something I could activate electrically), which I can activate and open electrically for few hours when needed.

Most of the aliexpress like platforms have valves, but not clear how long they can be operated. And numerous reviews suggest, even an hour of operation makes the coil/valve over heated, and even damaging the valve thereafter.

So can some one kindly suggest which device I should go after in the market? Do they have a different name than "continuous duty"? Kindly advice.

Update: Kindly suggest something affordable (within $20 or so) if suggesting buying links. Kindly note, I am looking for ready made solution, not as a project. Something like plug and play. I intend to connect it to IOT, but that is separate(we have plug and play switches) so kindly focus only on suitable low cost continuous duty valves. Motorized valves are good fit as one of answers suggested,and am already searching for low cost ones but in vain so far.

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closed as off-topic by DoxyLover, mkeith, Olin Lathrop, Transistor, Kevin Reid Aug 6 '18 at 16:13

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  • \$\begingroup\$ Maybe "potable water solenoid valve?" automationdirect.com/adc/Overview/Catalog/… \$\endgroup\$ – mkeith Aug 2 '18 at 6:48
  • \$\begingroup\$ They again fall under same solenoid valve categories Piloted Diaphragm , Zero Differential, Direct Acting - not sure which is fit for long run \$\endgroup\$ – Parthiban Rajendran Aug 2 '18 at 6:51
  • \$\begingroup\$ I doubt that even plumbers buy from aliexpress. Speak with a plumber. \$\endgroup\$ – Andy aka Aug 2 '18 at 7:08
  • \$\begingroup\$ They appear to be quality items. Max temp is 52C and max fluid temp is 146C. The solenoid may get hot, but no failure should occur, given the high temperature rating. Maybe you can find a ball valve or gate valve actuated by a servo. \$\endgroup\$ – mkeith Aug 2 '18 at 7:13
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    \$\begingroup\$ Why are you opening and closing this valve in the first place? Perhaps all you need is a simple passive check valve that only passes water in one direction. I assume you're just trying to prevent back-flow. \$\endgroup\$ – Dave Tweed Aug 2 '18 at 12:12
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Search Web for "motorized water valve". Unlike solenoid drives, motors need be energized only long enough to reach the desired open or closed state.

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  • \$\begingroup\$ Like this. It is great, but prohibitively costly ($135) \$\endgroup\$ – Parthiban Rajendran Aug 2 '18 at 7:31
  • \$\begingroup\$ There are many different styles available, many at lower prices. As an alternative solution: Use a solenoid valve with 2-level drive. That is, drive solenoid initially with full rated voltage. After a short time (ms to sec depending on valve) reduce the drive. You may have to experiment with how much you can reduce the drive while still keeping the valve in the state (open/closed) that you wish. Of course you must know enough electronics to build the 2-level drive (or find a published circuit) appropriate for whatever drive voltage you must use. \$\endgroup\$ – TeeKay Aug 2 '18 at 8:02
  • \$\begingroup\$ I forgot to mention, this is not a project I have time for, but an annoyance I am trying to avoid, so preferring a ready made solution ;) \$\endgroup\$ – Parthiban Rajendran Aug 2 '18 at 8:03
  • \$\begingroup\$ @mkeith Why do you discourage? Is it wrong to ask for help for readily available solution? \$\endgroup\$ – Parthiban Rajendran Aug 5 '18 at 4:21
  • \$\begingroup\$ First of all, you did not specify everything up-front. So people suggested things, and you rejected them by introducing new information. Every suggestion, there was some new requirement disclosed by you that made it not suitable. Then you say "this is not a project I have time for..." Well, maybe we don't have time for it either. Maybe our time is just as valuable as your time. \$\endgroup\$ – mkeith Aug 5 '18 at 5:29
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Aliexpress has motorised ball valves. They only use power while moving from one state to the other state.

I got a 3 way 1/2" one to switch the solar hot water down my chimney.

Most of them have no visible indication of which state they are in. (annoying) A few have a visible indicator, and even fewer have a manual knob as well.

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  • \$\begingroup\$ yeah, something like this would be great or at least LED indicators. Also option to operate manually in case of power failure. I am already in touch with these suppliers as well, with no results yet. \$\endgroup\$ – Parthiban Rajendran Aug 3 '18 at 4:43

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