[poleman]

Well set up the ROs and pump! but it didnt work  was hoping with the higher PSI pump (150) and mains water, it would have a high fill rate, only getting 4lts a min  which will take 4 hours for a 1000tls any advice sair or freshwater?

Andy

[freshwater]

TOLD YOU SO

THE VOICE OF EXPERIENCE

steve@freshwatersystems.co.uk

[sair]

 240 liters an hour of one membraine thats good,  thats more than enough to supply two men at 2 litres a min and you can fill and work

i never got your call andy

[poleman]

TOLD YOU SO

THE VOICE OF EXPERIENCE

steve@freshwatersystems.co.uk

hehehe  :

Andy

[freshwater]

Go back to what I said earlier in this thread about 12v pumps, flow & pressure. There aren't any pumps powerful enough at 12v. Your best option as I said previously is more membranes

steve@freshwatersystems.co.uk

[poleman]

240 liters an hour of one membraine thats good,  thats more than enough to supply two men at 2 litres a min and you can fill and work

i never got your call andy

Tony will ring tomorow

Andy

[poleman]

Well the company that built this http://www.purewindowwater.co.uk/Specials.htm said you can only do with more ROs & quoted me 2k for the system

be honest with you every industry expert I have spoken to has given a different view   

Andy

[freshwater]

Andy,

Not every expert it would seem that I have the same opinion as your suppliers. Just stop and think about it. If you have a membrane that produces x litres of water then 2 membraes will produce twice the quantity. Its pre school maths. And I would hazard a guess that based on the same theory 4 membranes might produce four times as much water but I only did A leve maths so this is a bit advanced for me.

steve@freshwatersystems.co.uk

[welmac]

Andy,

 but I only did A leve maths so this is a bit advanced for me.

steve@freshwatersystems.co.uk

should of done more spelling lessons 

[freshwater]

Welllllllllllllllllllllllllmacccccccccccccc

We did A leve maths, it was a shorther course than A level.

steve@freshwatersystems.co.uk

[poleman]

I never disagreed with you, however the ROs came from a static system that fill in 1 hour and 40mins, which is what I am trying to do same psi pump

Andy   

[poleman]

How about filling the tank of tap water and when we need pure water we can run it thought the ROs! To clean?

Andy   

[freshwater]

What was the pressure of the water where the static systems was? Compare this with the water you can get when you’re out and about, if they are different by a large degree then yes you need a pump, BUT you can't get a big powerful 12 volt pump they don't exist. If you are prepared to buy a generator you could use a 240v pump we do a high pressure high flow pump it does 7 lpm at 100psi with a 1hp motor, not to be confused with the pressure boosting sets being sold by other suppliers this is 7 lpm at 100ps not 7llpm or 100psi.

Or as I have said before add more membranes, its cheaper and easier than pumps.

steve@freshwatersystems.co.uk

[freshwater]

If you fill your tanks with tap water you will still need pressure to get it through your memnbranes, plus out a 1000 litres of tap water how much pure will get?

steve@freshwatersystems.co.uk

[poleman]

750lts with a 25% waste, think I am going to try this, is there any downsides?

Andy

If you fill your tanks with tap water you will still need pressure to get it through your memnbranes, plus out a 1000 litres of tap water how much pure will get?

steve@freshwatersystems.co.uk

[freshwater]

Yes,

The down side is you don't have a pump capable of doing the job.

Anyway give it a go with what you've got and report back, I for one would like to know the result. Let us know the TDS in, the TDS out and the flow rate of the pure.

steve@freshwatersystems.co.uk

[poleman]

OK are let you know, the only downside i can think of is waste water being dump on the road or pavement in the winter

Andy

[thewindowcleaner1]

http://www.ro-man.com/shop/product_info.php/products_id/235

I'm having one of these should sort my problems out...

[freshwater]

The,

Let us know how well it works, also your input & output TDS and your water pressure.

steve@freshwatersystems.co.uk

[JM123]

Hi guys, I've gotta back up the steve man, as long as you have sufficent pressure (above 60psi or so) then the only 'real' way to boost production is to add membranes or use a higher capacity membrane. 

I just had a look at the purewindowwater pictures and let me tell you something - that is a death trap.  You cannot properly secure an IBC tank in a van - Intermediate Bulk Carrier, its for transporting fluids on the back of a lorry, where it poses no threat to the driver etc etc, not in the back of a van where it can tear away from its pallet and ....well, I don't need to say any more.