Clean It Up
UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: Alex Wingrove on March 31, 2008, 06:22:49 pm
-
OK
might need to get a new RO, enough to make 1500-2500l a day, well i say a day, as fast as possible (no merlin)
it has to a shut off valve when the tank is full,
has to have DI
has to have auto flush,
what could i buy?
Thanks
Alex
-
Go 4040, then just get a di vessel. If you can put a booster on it even better.
Heres a 4040 well under a grand
http://cleaningspot.co.uk/acatalog/RO_system_spare_parts.html
Simon.
-
ok so how much for the booster pump, these things can take upto 150psi right?
auto flush and auto shut off
-
http://www.gapswater.co.uk/acatalog/copy_of_Reverse_osmosis_kits.html
go for the basic twin RO - and ring June, tell her you want the stainless steel housing for the same money!
for a booster pump this will do fine
http://www.machinemart.co.uk/shop/product/details/cpe120-1in-self-priming-water-pump
or
http://www.machinemart.co.uk/shop/product/details/tam120-11-2in-230v-centrifugal-water-pum this is probably a better pump for the job.
All in you'll still have change from a grand and will make around 300ltrs/hr easily = 7200ltrs a day.
Alternatively you could just go for a single 4040.
Before you buy a pump though, check your water pressure at home, if its over 60psi you don't need a pump.
-
sorry just reread the post - you need a di - look on ebay (guy there sells them for £35) search under DI filter.
Auto shut off - 12v solenoid kit
http://www.stcvalve.com/Process%20Valve.htm?gclid=CNq7jP-huJICFQN0sgod1W0FQQ
you want to order one that is normally closed and a vertical/horizontal level switch - they're easy to install.
-
that is loverly thanks for the info,
i heard that i could get 4l a minute from a single, didn't know if this was accurate as my tap is about 215ppm and it comes out through my normal 300gpd ro at 1 or 2
the solenoid wont effect my ibc will it? i will definitely be able to fill it up to 1000l?
i heard ro man do a auto flush for £20, any good?
-
are 20 inch pre filters better than 10?
-
the 20inch prefilters last roughly twice as long - they're twice the price too - however I would recommend them as the more contact area for water/carbon the less likely you'll get chlorine in the membrane.
the IBC will still fill to 1000ltrs - actually a bit over it and you need to make sure you position the level switch at the lowest point of the top of the IBC so that it can't overflow.
so what do you think - twin RO?
Our twin RO (we have a merlin as well - very good) is twin stainless steel with desal membranes, a grundfos pump (expensive) and 10inch prefilters, we run it at 85psi - 95psi and it makes around the 300ltr/hr mark. If i turn the pressure up to 100psi it makes about 450ltrs/hr but I prefer more waste water.
-
I like the idea of twin RO, the more pressure i put through i get more water, but does this also take away some life from the membrane?
Also if i have an auto flush and the larger membranes, will i be able to make a membrane last 2 years?
-
I have a 4040 Ro. I can fill my 1000ltr tank in 4 hours.
My water pressure is low so I use a Booster pump. The Booster pump lets you produce more water per minute as it pumps more water into the Ro memmbrane. The memmbrane works more efficently the higher the pressure. So your memmbrane will last longer if you use a booster pump.
I have this pump,http://www.machinemart.co.uk/shop/product/details/cbm240e-1in-multi-stage-230v-booster-pum/path/booster-centrifugal-pumps
It comes highly recommended. I have my valve set on permenant flush when filling my Ibc tank and I can still produce 240 ltrs an hour. The reason its set to flush all the time is to preserve my memmbrane, my first memmbrane only lasted 18 months. Some expensive lessons learned.
My current memmbrane is 11 months old. I dont have a Di tank attached to it as It produces 0 tds from an average of 100tds, though I have di tanks in the van as I still want the water to go through resin.
A quality pump is a must and reguler changes to your pre filters will preserve your investment.
Regards Neil.
-
20" prefilters, how long can i expect them to last making 6500l a week,
how does constant flush work?
-
i guess you all hate me dont you
i expected more from you NWH,
oh well
-
??? ??? ??? ??? ??? ???
-
dont act all sheepish now, you had your chance
-
20" prefilters, how long can i expect them to last making 6500l a week,
how does constant flush work?
i guess you all hate me dont you
?
If your making that much water I'd change the prefilters every 3 months. I'd also seriously consider investing in a water softener depending on what you tap tds is of course.
Simon.
-
tap tds is 215,
every 3 months!!!!
even 20inch ones?
-
dont act all sheepish now, you had your chance
Sorry Alex,i would go to Gaps water and speak to June.They have a really good after sales rep,and will talk you through any problems over the phone.If you`d had said a month ago you could have had my 40x40 with pre filters off of me.
-
Make a point of changing the pre filters regardless of quality at a set time that way your saving the membrane.
-
dont act all sheepish now, you had your chance
Sorry Alex,i would go to Gaps water and speak to June.They have a really good after sales rep,and will talk you through any problems over the phone.If you`d had said a month ago you could have had my 40x40 with pre filters off of me.
yeah gaps water was where i was going to buy, but i like to be armed first.
why would you sell a 4040 ro?
unless you bought a systems that does it all for you?
even so, why sell?
-
It was all on the van mount set up.
-
How much would a set of 20 pre filters set me back then, would 25l of resis last a year if its coming out at about 2-4ppm
-
For a year at that reading 50ltrs would last you a year ie 1 change after 10-11 mnths,that reading at out RO your membrane should last.You can get the waste down to 20% with fine tuning.
-
The should resin will last that long easy. The 20 inch filters are about £35 - £40 for the both. If your producing that much water and earning the money coming from it then replacing them every 3 months should not be a problem. The whole thing works better for longer if cared for. Hence maybe a good idea for the water softener.
Simon.
-
How much would a set of 20 pre filters set me back then, would 25l of resis last a year if its coming out at about 2-4ppm
last longer if you have twin di ;)
-
At 3-4ppm i wouldn`t bother with another DI you won`t need it.
-
At 3-4ppm i wouldn`t bother with another DI you won`t need it.
::) pure water is 000.
3/4 is not make the water right you dont have a problem with the water.
I am not knocking you if you do this, but myself it will always be 000, anything else is not good enough, I'm funny like that.
same as trad top job or money back
-
I really think you should spend a little extra - get the twin 4040, one of the booster pumps I recommended and 20" prefilters. Get the lot from June @ Gapswater in a deal.
You really don't want an auto flush - the quarter turn valve included with the RO does the same job.
Single RO will still produce all the water you will ever want though, even if you do go for single ro it should last 5 years or so if well maintained.
-
At 3-4ppm i wouldn`t bother with another DI you won`t need it.
::) pure water is 000.
3/4 is not make the water right you dont have a problem with the water.
I am not knocking you if you do this, but myself it will always be 000, anything else is not good enough, I'm funny like that.
same as trad top job or money back
I mean you don`t need twin Di vessels in van not don`t bother with a DI lol.
-
At 3-4ppm i wouldn`t bother with another DI you won`t need it.
::) pure water is 000.
3/4 is not make the water right you dont have a problem with the water.
I am not knocking you if you do this, but myself it will always be 000, anything else is not good enough, I'm funny like that.
same as trad top job or money back
I mean you don`t need twin Di vessels in van not don`t bother with a DI lol.
lol.
the reason i want auto flush is apart from changing filters every 3 months, i dont want daily weekly maintenance stuff, i want to pump the water to my van and subsquent vans, and it starts making the water when it get below 1000l stops the ibc is full, flush when it is supposed to automatically, i dont want to flush each time i fill, this would be an absolute pain,
but if i can flush all the time at a quarter turn? this sounds good,
alan what pump the one you recommended or one you have?
-
if you want to spend loads of money then buy what I have.
Grundfos £465
If you want something a bit cheaper then either of the ones I recommended will be fine. The big plus with the Grundfos is build quality (second to none - ensuring reliability) and the fact that even at 90psi or so it still pumps about 15lpm, something that the cheaper pumps wont do.
I ran the twin ro today @ 100psi for 2hrs and made almost 1000ltrs of pure with about 50/50 pure/waste.
With a less gutsy pump I doubt it would have made 600ltrs in that time.
-
impressive, i have no idea what our current tap pressure is, i know it is pretty good, it must be at least 50-60, but i want to be able to pump it through the 4040 at least 90.
i would like a twin ro but just for the RO its £950 always room to upgrade though.
with the RO on constant flush what waste ratio etc etc will this achieve,