[poleman]

I have a high pressured 40 / 40 RO which can take 150 psi

However my problem is that most WFP pumps are 100psi and 12v

And all pumps above 100psi is 240v which is mains electric, how can I over come this problem as we can only fill up from standpipe in the road and wont to reduce the time sat in the van

We need 120 / 140 psi and it needs to be power in the van, any help is appreciated

Andy
PS Just looking here, seems this was built for someone that wont to fill up fast like me, maybe it might be a system for the future, what with RO taking so long to purifier

http://www.purewindowwater.co.uk/Specials.htm

[gsw]

not sure if this will help you, but this bloke seems to have no trouble filling up fast! if he is telling the truth!

I would be interested to know if a) this system works aswell as he states.
b) does anyone else use similar?

greg

[Roy Harding]

Andy

You could by a inverter that plugs in to lighter socket that takes 12volt up to 240volt.

Roy

[freshwater]

Andy,

A 12v pump will not do the job. As well as pressure you also need flow. The only pumps that will give you the required pressure & flow are 240v mains. The only possibly way you could get the high flow & pressure required would be by using a petrol driven pump (I haven’t come across a decent one yet) or by having a petrol driven generator to get you the 240v supply needed. Just take a look at our web page http://www.freshwatersystems.co.uk/series_lc.htm this shows our ARO systems which have 200 psi pumps, but you also need all the other bits of kit to ensure it works correctly & safely, such as pressure gauges, low & high pressure switches, flow gauges etc.

Don’t waste your time and effort trying to do it with 12v pumps or invertors, it won't work.

If you need any prices or info on pumps for you 4040 post on here or e-mail us.


steve@freshwatersystems.co.uk

[poleman]

Freshwater, the 4040 ROs can only take up to 150psi I believe! Flow I have got lots of as its from the mains in the road, as for the pump I would need, if you def have something that would suit what I am trying to set up then I would def be interested, are you around on Monday if so the maybe could we have a chat on the phone!

Andy
Tel: 01202 779831
contract@smart-cleaning.co.uk     

[poleman]

Just to add, I wont to fill a 1000lts in one or two hours!

Andy

[Bonzer]

Steve,

Just looking at your ARO500 system - Would you still need to put the output through a polisher DI? What sort of TDS could you expect on the output from this?

How long does RO membrane last if you're doing 1000L per day?
What sort of pure/waste ratio is there?

[freshwater]

Pole man,

4040 low pressure membranes have a max pres rate of 400psi. It all depernds on what your membrane housing and its pipework can take. We are down south on Monady on & Tuesday fitting a 750 litres duples softener in a nursing home, so if you want to talk please call on Wednesday afternoon.

steve@freshwatersystems.co.uk

[freshwater]

Bonzer,

On cold water you will get 800 to 1000 litres per day. You need to soften on the way in & you will need de-min on the way out. The memnbrane will last 2-3 years. Waste can be adjusted, it you reduce the waste the TDS goes up, if you increase the waste the TDS goes down. On average you will get about 90% reduction of TDS.

steve@freshwatersystems.co.uk

[poleman]

Steve

Been looking at this link http://www.purewindowwater.co.uk/Specials.htm and can only see a 100psi pump, now its stated on there "large amount of water quickly - hence four 40" membranes!" would I still need to have a pump above 100psi or would the more ROs solve my problem of wonting to fill up with 2 hours of a standpipe in the road. (your help is much appreciated)

Andy   

[freshwater]

Poleman,

If you run a 4040 at a low pressure, say 40 psi then you will get less than half the normal production, then you have to take into account the temperature which will also cut your production in half, then the production quality which is dependant on you input TDS. A low pressure 4040 will produce 8000 litres per day at 115 psi, so if you are running at low pressure eg 40 psi your production should be about 2800 per day, divide by 2 for temperature loss so that’s 1400 per day which equals 58 litres per hour. If you want to fill say 500 litres in 2 hours you would need 5 membranes. BUT then you get all the pressure losses in your pre-filters, softening vessels & pipe-work so you need to add at least 20% capacity, so I would go for 7 or 8 membranes. You will also need a softener that can run at 300 litres per hour.

It’s possible, if you want a price for a bank of 8 membranes & a softener let us know.


steve@freshwatersystems.co.uk

[sair]

our single r/o van,mounts produce 250- 300 litres an hour granted there boostered

dont see why you need that many membraines

[poleman]

Tony got your e-mail  yes you was right Williamson Pumps Limited, have a 150psi 12v pump so can come of my battery in the van, which has saved buying   
inverter, generator or more ROs which could of cost hundreds of pounds

Andy
PS Tony whats your phone number! 

[sair]

hi Andy

07944 227635

[poleman]

Tony, are give you a ring tomorrow, I am sure you have finished for the day 

Andy

[abacus]

Hi pole man

I dont sell pumps but have seen flojet pump  with small tank set up  it is 2800 series booster system in 12v or 240 v operating at 2.8 bar and max 17LPM OR 1020 LPh

Sorry dont know how to upload picture cost around £255.00 williamsons pumps should be able to supply
if this helps

regards grant

[freshwater]

abacus,

2.8 bar isn't nearly enough, is only about 40 psi, and have you checked the curve for the pump, its probably does 17 lpm at 0 psi but what does it do at 40 psi? I’ve just been to Flojets site and here is a link to the data sheet http://www.jabsco.com//prodInfo/overview/81000_290D_10_05.pdf
as I suspected if you look at the curve you will see that at 2.8 bar the pump flow is 0 and with the tank its about 10 lpm. DONT JUST READ THE HEADLINE FIGURES FOR PUMPS, YOU NEED TO KNOW WHAT FLOW AT WHAT PRESSURE.

There is no magic solution to high flow and high pressure, you need a good specialist pump, and they cost a few quid.


steve@freshwatersystems.co.uk

[freshwater]

sair,

whats your initial water pressure before the booster pump, and whats the pressure after the booster pump?

steve@freshwatersystems.co.uk

[freshwater]

sair,

waiting for your reply.

steve@freshwatersystems.co.uk

[freshwater]

sair,

still waiting for your reply