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johna
 Post subject: valves
PostPosted: Jan 24th, '15, 03:59 
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Is there a electric valve on the market that is not to exy that will open without to much pressure. I have tryed out a few now and every one needs a lot of pressure to open.
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BuiDoi
 Post subject: Re: valves
PostPosted: Jan 26th, '15, 16:47 
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..
BALL VALVES... Stainless Steel..
I just bought some, but they were worth about $30 each..
..
.
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Stuart Chignell
 Post subject: Re: valves
PostPosted: Jan 26th, '15, 17:31 
Seriously, this cant be healthy.
Seriously, this cant be healthy.
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Joined: Feb 23rd, '07, 03:48
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Short answer seems to be no.
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Johnh
 Post subject: Re: valves
PostPosted: Jan 26th, '15, 17:53 
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Recently Pond_sucker was playing around with pool diverter valves and Indexing valves.
from his link though it still seems the actuators are US$100 plus on top of the
valve price. A couple of years ago someone on here was trying a rotisserie
motor to drive a SS ball valve. I can't find it now and didn't hear how it worked out
but if you like playing with things it looks feasible
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Johnh
 Post subject: Re: valves
PostPosted: Jan 26th, '15, 20:03 
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Just saw the post on Float valves in another thread and did a search at that site
there are some reasonable priced motorized valves here
biggest I saw was 1" http://www.aliexpress.com/wholesale?catId=0&initiative_id=AS_20150126035345&SearchText=electric+water+valve
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BuiDoi
 Post subject: Re: valves
PostPosted: Jan 26th, '15, 21:23 
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Johnh wrote:
Recently Pond_sucker was playing around with pool diverter valves and Indexing valves.
from his link though it still seems the actuators are US$100 plus on top of the
valve price.


Gee... did you not read thirty bucks

http://www.aliexpress.com/item/1-DN25-Electric-Ball-valve-DC12V-24V-Stainless-Steel-304-Motorized-ball-valve-T25-S2-B/1337671102.html

I hope this works.. but they are fourth bucks now... :upset:

You may. May. Find cheaper

PS... get real guys... if you are not shopping on ALIEXPRESS.... then you are seriously missing out...
I have bought fantastic things on there and only one dud.... well, it was too good to be true... just use common sense..
..
.
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Johnh
 Post subject: Re: valves
PostPosted: Jan 26th, '15, 22:09 
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BuiDoi wrote:
..
BALL VALVES... Stainless Steel..
I just bought some, but they were worth about $30 each..
..
.


Sorry BuiDoi didn't get the fact you where talking motorized valves

What are you using as a driver for them?
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johna
 Post subject: Re: valves
PostPosted: Jan 27th, '15, 04:15 
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I have a few solinoid valves but there the ones that need pressure to work. The electric ball valves on ali express are the ones i would need but are a bit pricy as i would need a few.
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BuiDoi
 Post subject: Re: valves
PostPosted: Jan 27th, '15, 05:37 
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..
The price IS a little high, but nothing like what you would pay in Australia..
And when you look at alternatives, they become more attractive..
The thing is to watch the sellers who will send for free..

To come clean... I am not currently using them as control valves.. :oops: as I am just using time clock control and flood all beds at the same time.. likely, the next addition to the system, will exceed the sum capacity and I will have to find the time to implement sequential control and constant pump operation..
..
.
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johna
 Post subject: Re: valves
PostPosted: Jan 30th, '15, 03:43 
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found one now trying it out. its a bit expensive though but when you look at all the piping and joints and everything that you have built the system with its normal.( this is not a cheap hobby) it starts out ok but expansion kicks in.
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BuiDoi
 Post subject: Re: valves
PostPosted: Jan 30th, '15, 05:37 
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johna wrote:
found one now trying it out. its a bit expensive though but when you look at all the piping and joints and everything that you have built the system with its normal.( this is not a cheap hobby) it starts out ok but expansion kicks in.

:notworthy: oh how true...

What is the valve you found and how much..
..
.
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Food&Fish
 Post subject: Re: valves
PostPosted: Jan 30th, '15, 09:19 
Seriously, this cant be healthy.
Seriously, this cant be healthy.
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Joined: Aug 24th, '06, 19:46
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Ah the good old search button
Ellkaybee a very active and smart member here in 2007 had low pressure valves filling and draining his grow beds
viewtopic.php?f=18&t=755&start=105
start reading at page 8 or 9
apparently these ran quite successful for quite a while till a flood wiped out the whole thing I believe with the flood and health issues he just lost intrest
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johna
 Post subject: Re: valves
PostPosted: Jan 30th, '15, 16:21 
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BuiDoi wrote:
johna wrote:
found one now trying it out. its a bit expensive though but when you look at all the piping and joints and everything that you have built the system with its normal.( this is not a cheap hobby) it starts out ok but expansion kicks in.

:notworthy: oh how true...

What is the valve you found and how much..
..
.

good old bunnings $27. its sounds like a motorised gate valve runs on 2 AAA batterys has hours and minuites on the timer. got it set . every hour open for 10 miuites, because its such low pressure it fills and kickes in the syphon.in time. no more fiddling with the valve to tune it to fire off and then break.
doesent seem to matter how much hight is in the header tank as long as its flowing. quite happy with it at the moment, i might get some more.
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