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'[EE:] Miniature solenoid-style valves'
2003\12\26@172250 by Jim Tellier

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Anyone have recommendations for a U.S. supplier of small (tiny?) valves for use with chemical solutions?  The flow rate should be somewhere in the neighborhood of 30L/Hr (1/2L per min.) and operate at less than 5 PSI.  Ideally, I'd like to run from 5VDC, but can use other (low) voltages if need be.   Response times for open/close aren't critical, and I wouldn't necessarily say they "must" be solenoid types if something else is equally suitable.
I've been looking all over the web and see a *lot* of possibilities out there, but wonder if any of you folks have actual experience with these things.
Thanks for any ideas!
Jim

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2003\12\26@185539 by Larry Green

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Subject: [EE:] Miniature solenoid-style valves


Anyone have recommendations for a U.S. supplier of small (tiny?) valves for use
with chemical solutions?  The flow rate should be somewhere in the neighborhood
of 30L/Hr (1/2L per min.) and operate at less than 5 PSI.  Ideally, I'd like to
run from 5VDC, but can use other (low) voltages if need be.   Response times for
open/close aren't critical, and I wouldn't necessarily say they "must" be
solenoid types if something else is equally suitable.
I've been looking all over the web and see a *lot* of possibilities out there,
but wonder if any of you folks have actual experience with these things.
Thanks for any ideas!
Jim

Hi Jim,

I sent your request to a good friend of mine in the irrigation/fluid transfer
business, his replies to your questions are below (preceded by @@@@).......

--------------------------

> Anyone have recommendations for a U.S. supplier of
small (tiny?) valves for use
> with chemical solutions?

@@@@ I make 'em in PVC or Delrin plastics... Delrin is
impervious to most everything....

> The flow rate should be somewhere in the neighborhood
> of 30L/Hr (1/2L per min.) and operate at less than 5
PSI.

@@@@ Volume is not the major problem, but at 5 PSI or
LESS pressure, delivering 1/4 Gpm is a tough order.  It
takes a minimum of about 20PSI to seal electrical
non-diaphragm solenoids.  Diaphragm type valves are
going to be quite expensive and aren't really
applicable in the pressures mentioned, let alone the
size.

> Ideally, I'd like to run from 5VDC, but can use other
(low) voltages if need be.

@@@@ To locate/purchase 5VAC/DC solenoids is going to
be exorbitant in cost.  They might be available from
Beckman, the medical testing machine folks, but I'll
guarantee they will be well in excess of $100 each as
they are tied into the medical testing profession.  24
VAC solenoids are, however,  easily obtained and
downright cheap to buy, so perhaps small relays with a
5 VAC activation voltage might be used to get 24 VAC to
the solenoid....

> Response times for open/close aren't critical, and I
wouldn't necessarily say they
> "must" be solenoid types if something else is equally
suitable.

@@@@ Hydraulic type valves could be addressed here, but
they, too, are of the diaphragm type, and probably not
usable here.

> I've been looking all over the web and see a *lot* of
possibilities out there,
> but wonder if any of you folks have actual experience
with these things.
> Thanks for any ideas!

@@@@ Well.... I MAKE 'em!!   Sent him to my website and
have a look at the "Hermie" valve.  The basic body can
be pared down in size and in/outlets can be most
anything he might want....  Might be worth his looking
at the site and see if it's applicable in his case...

-------------------------

So if you are interested Jim my friends website for his valves is.........

http://members.cox.net/tismaz/hermie.htm

and his main site is at...........

http://members.cox.net/tismaz/billtism.htm

Hope the information is useful.

Larry Green VE3YET

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2003\12\26@203656 by Jim Tellier

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Thanks for the info Larry!  I'll check out his web site!
Jim

----- Original Message -----
From: "Larry Green" <larry.greenspamKILLspamSYMPATICO.CA>
To: <.....PICLISTKILLspamspam.....MITVMA.MIT.EDU>
Sent: Friday, December 26, 2003 3:56 PM
Subject: Re: [EE:] Miniature solenoid-style valves


> Subject: [EE:] Miniature solenoid-style valves
>
>
> Anyone have recommendations for a U.S. supplier of small (tiny?) valves
for use
> with chemical solutions?  The flow rate should be somewhere in the
neighborhood
> of 30L/Hr (1/2L per min.) and operate at less than 5 PSI.  Ideally, I'd
like to
> run from 5VDC, but can use other (low) voltages if need be.   Response
times for
> open/close aren't critical, and I wouldn't necessarily say they "must" be
> solenoid types if something else is equally suitable.
> I've been looking all over the web and see a *lot* of possibilities out
there,
> but wonder if any of you folks have actual experience with these things.
> Thanks for any ideas!
> Jim
>
> Hi Jim,
>
> I sent your request to a good friend of mine in the irrigation/fluid
transfer
> business, his replies to your questions are below (preceded by
@@@@).......
{Quote hidden}

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2003\12\31@225317 by amg amg

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You might try Precison Dynamics in New Britian, CT.  Not sure about the
5vdc, but Pre-Dyn does specialize in custom valves.  Watch out for long
lead times.  http://www.predyne.com/index.asp


On Fri, 26 Dec 2003 14:20:06 -0800 Jim Tellier <@spam@jimtellierKILLspamspamCOX.NET>
writes:
{Quote hidden}

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'[EE:] Miniature solenoid-style valves'
2004\01\01@124058 by Jim Tellier
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amg amg wrote:
> You might try Precison Dynamics in New Britian, CT.  Not sure about the
> 5vdc, but Pre-Dyn does specialize in custom valves.  Watch out for long
> lead times.  http://www.predyne.com/index.asp
Thanks!  That's a great web-site... looks like they could probably give me
what I'm looking for.  Since they're custom, we'll have to see what the $$$
will be.

Jim

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2004\01\02@222112 by amg amg

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On Thu, 1 Jan 2004 09:38:50 -0800 Jim Tellier <RemoveMEjimtellierspamTakeThisOuTCOX.NET>
writes:
> amg amg wrote:
> > You might try Precison Dynamics in New Britian, CT.  Not sure  about
the
> > 5vdc, but Pre-Dyn does specialize in custom valves.  Watch out for
long
> > lead times.  http://www.predyne.com/index.asp

> Thanks!  That's a great web-site... looks like they could probably
give me
> what I'm looking for.  Since they're custom, we'll have to see what the
$$$
> will be.
>
> Jim

Jim,

Pre-dyne does have some standard catalog items.  I buy small quantites of
the D series valves valves and they are in the $40-60 range through a
local distributor.

I forget your original requirements, but you might also check out
http://www.clippard.com.  The list some 6 vdc (0.67 watt) valves as standard
with other voltages available on request.

amg

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2004\01\03@090755 by Jim Tellier

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amg wrote:

> I forget your original requirements, but you might also check out
> http://www.clippard.com.  The list some 6 vdc (0.67 watt) valves as standard
> with other voltages available on request.
Thanks for the pointers... it's been difficult to reach people over the
holiday, but we'll see what I can find next week!
One thing I didn't mention was that I'm looking for 8 of these valves;
$40-60 a pop would definitely blow the budget!  I've been keeping tabs on
Ebay and LabX, but no luck yet.
Thanx!
Jim

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2004\01\03@105742 by John Ferrell

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I have acquired some interesting valves in the past from places like
Alltronics. They were used in auto emission controls & such. Fine for one
off projects, but supply may be unstable.
John Ferrell
6241 Phillippi Rd
Julian NC 27283
Phone: (336)685-9606
johnferrellEraseMEspam.....earthlink.net
http://DixieNC.US
NSRCA 479 AMA 4190  W8CCW
"My Competition is Not My Enemy"

{Original Message removed}

2004\01\03@200759 by William Chops Westfield

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On Saturday, Jan 3, 2004, at 06:07 US/Pacific, Jim Tellier wrote:

> One thing I didn't mention was that I'm looking for 8 of these valves

Well, there's these that have shown up on the surplus market recently:

http://www.allelectronics.com/cgi-bin/
category.cgi?category=search&item=SV-2

Like most complex items found in surplus, it's difficult to tell whether
it's suitable or not, but at ~$5.00, it might be worth buying 8 of them
just in case (the other big problem with surplus, of course, is that
even
if they work GREAT, you may never be able to find more to buy...)

BillW

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2004\01\03@222141 by William Chops Westfield

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On Saturday, Jan 3, 2004, at 17:06 US/Pacific, William Chops Westfield
wrote:

> Well, there's these that have shown up on the surplus market recently:
>
> http://www.allelectronics.com/cgi-bin/
> category.cgi?category=search&item=SV-2
>

Similar (?) at american science and surplus (http://www.sciplus.com) for
only $3...

I don't supposes there's a "partminer" equivalent for hobbyist
and surplus stuff?  I can't quite decide whether I believe that
that would be a good idea...

BillW

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2004\01\04@162002 by Jim Tellier

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William Chops Westfield wrote:
> Well, there's these that have shown up on the surplus market recently:
>

http://www.allelectronics.com/cgi-bin/category.cgi?category=search&item=SV-2

Hmm,, now that's one I hadn't seen .. and I just looked at their site
yesterday...  price is right,,, I think I'll have to make up an order!
Thanks for the pointer!
Jim
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2004\01\04@163455 by Jim Tellier

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> Similar (?) at american science and surplus (http://www.sciplus.com) for
> only $3...
>
Hey, that's a fun site! I hadn't heard of that one before... lots of cool
"stuff"!

> I don't supposes there's a "partminer" equivalent for hobbyist
> and surplus stuff?  I can't quite decide whether I believe that
> that would be a good idea...
  When you say "partminer", you mean a search engine? Haven't heard of one
specifically like that; don't know why it wouldn't be a good idea though,
except maybe on the wallet! :^)
Jim
>
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2004\01\04@221653 by DOC

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I could be wrong, but this doesn't look like a balanced valve.

This means that the solenoid is likely working against the air
flow when it is active.

May or may not be a problem for you and for the price prolly
worth checking out.


DOC

http://www.robot-one.ca


At 01:18 PM 1/4/2004 -0800, you wrote:
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