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Old April 13th, 2018, 02:51 PM   #1
milmat1
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Electrically operated valves ?

I have an application where a standard solenoid valve is not working. Mainly due to fragments of dirt getting into them and holding them open. I need something that is positive opening / closing.

I am looking at motorized ball valves from Dealat, but they require as long as 16 seconds to open / close. No good...

Is there another choice for a positive acting valve that can work a bit quicker. Say 5 seconds max ?

3/4" valve flowing water to cool a cutting blade...
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Old April 13th, 2018, 02:55 PM   #2
jimtech67
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https://www.valworx.com/category/motorized-ball-valve
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Old April 13th, 2018, 02:58 PM   #3
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Search Motorized Ball Valves on google
you will find many options

https://www.chemworld.com/Types-of-M...ves-s/2250.htm
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Old April 13th, 2018, 03:04 PM   #4
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If there is supply of compressed air I recommend a pneumatic operated butterfly valve, works very well with dirty liquids, but maybe the minimum size is larger than 3/4 ".

Something like this
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Old April 13th, 2018, 03:04 PM   #5
James Mcquade
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May I suggest creating a sediment tank to allow trash to settle,
then have a secondary filtration system.

no valve likes dirt.
I have used numatics for years. they are spool type valves and can cut small items as they shift.

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Old April 14th, 2018, 04:19 AM   #6
rdrast
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I use pneumatic actuated ball valves all the way down to 1/2", no issues at all, and they are well under 1 second to shift. Not cheap though, so if cost is an issue, it would be more inexpensive to put a dual filter/strainer in front of your solenoid valves, and just clean the strainer/change the element as necessary.
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Old April 14th, 2018, 07:50 AM   #7
Tom Jenkins
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Eccentric plug valves are a good choice for fluids with a lot of suspended solids:

http://www.dezurik.com/products/prod...pec-pef/1/115/

A variety of operators are available.
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Old April 14th, 2018, 09:47 AM   #8
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Pneumatic ball valve would be my go-to. QSM is a good brand- there are lots of others.
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Old April 15th, 2018, 05:34 AM   #9
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But if the particles are metallic I think that sooner or later all valve types will fail.
As others have said before the only reliable thing would be to install a decantation tank and filtering system.
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Old April 16th, 2018, 09:10 AM   #10
milmat1
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All good answers, Thank you..

My suggestion that we simply need clean water didnt go over well. So I'm still digging. The one thing I pointed out is the fact that we are using a very cheap sol valve to begin with.

The cheapest and most reliable solution seems to be a proper filter for the incoming water..
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Old April 16th, 2018, 09:45 AM   #11
Tom Jenkins
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IF you are going to filter I'd start with a strainer with a magnetic plug of the sort provided in hydraulic systems, then a coarse filter downstream.
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Old April 16th, 2018, 02:24 PM   #12
boneless
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Hi!

We have used these in the past for blow down valves (read: sediment/particles...) Pretty quick to open. From what I remember, not cheap. http://www.ta-roloff.com/en/product/...series/?part=1
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