[DASERVICES]

It's a pity we are not scientific enough to analyse all this data, what we need is now litres will be produced from a bag at xxxxppm.

Suppliers do not have to inform wether the resin is reginerated or virgin on the bag, they have the option to put any grade in.

There is a huge difference with some products with some lasting twice as long. Locally produced resin will more and likely be regenerated as it far more cost effecive to produce this way.

[macmac]

GEEEEEEEEEEES doug, i'm a window cleaner!
You're right, for one i am certainley not scientific enough to analise all that info
I can't specificaly tell you how many litres of water i purify with one bag of resin etc. What i can say is that my findings are correct with my situation as i also have tried many things to reduce my resin costs without sacrificing water quality. As stated, i use much more water now than i did two years ago but less than half the resin! My tap tds is 76ppm (recentley dropped from 96ppm)

1. purolite- when this resin hits 001ppm there is generaly no stopping it just rising by the minute & in no time, usualy a day or two at the most is un-usable for window cleaning i.e. tds= 20/30/40 etc.
2. When this happens with dowex 001ppm will stay at 001ppm all week & only start rising slowley, a quick shake of the vessel ( performed in the correct way) will put the reading back to 000ppm. Obviousely it will rise again & the periods of time at 000ppm get less & less & so this is when i switch vessels round.
3. with either of these resins the higher the flow the less efficient they become, i.e. if say i have a reading of 001ppm & i then run water through at full mains pressure the reading will start to shoot up. I tried it with a 000ppm reading too & found the tds starting to rise but slow the flow back to normal & hey presto- 000ppm again.
4. With purolite i could never get more than 4 weeks out of a 3/4 fill of 2- 11Ltr DI's, but with dowex i can get 7/8/9 weeks & i'm using more water now.

Dave @ st ives

You havent answered the most important aspect of this topic yet mate- have you run your di's at only a low flow rate to steadily fill your tanks- or have you always filled at full tap pressure- 600lph? as i'm pretty sure this is having a big affect on your resin economy but i can't seem to get it out of you

Tony

[[GQC] Tim]

macmac, he can't do it at half the pressure, cuz he fills up the van directly, not in a holding tank, so time is of the essence.

What exactly do you mean with shaking the vessel the right way, is there some sort of dance I should perform?

[Moderator David@stives]

I have turned the tap down and nothing happens.

I bet your one of those guys who turns the shampoo bottle upside down just to get that last inch out

[DASERVICES]

That's what I found out as well Tony.

With Purolite and Rohm I would get around 2 months usage out of a bag and the TDS went from 001 to 010+ after a couple of fills.

With Tulsion I am getting between 5 to 6 months usage and the TDS gradually rises, that is with one di vessel and tds around 34.

What we have to remember these products are not designed for the window cleaning industry and are soley used in other industries. Window cleaning has tagged along behind so the manufacturers make these products to their customers requirements but unfortunatley window cleaning is not one of them.

I know there is an even better preforming Tulsion product than MB115 but we would have to pay through the nose for it. And as we know us window cleaners like things to be cheep

So from forking out around £540 a year to around £192 a year there is a huge difference.

Doug

[Mike 108]

Dave Morris @ St Ives - I assume your post about the shampoo bottle was with tongue-in-cheek!  Tony (macmac) is really trying to help and save you money!

[Paul Coleman]

I have turned the tap down and nothing happens.

I bet your one of those guys who turns the shampoo bottle upside down just to get that last inch out

I've got a better way.  I run a bit of water into the bottom of the bottle to get the last wash from it.  I do it with bubble bath too   

[Mike 108]

Tony (macmac)/Dave @ St Ives/anybody

I do all my WFP work on 2/3 consecutive days and it is not used again until the following week.

Have I understood correctly in the 'purolite specification' post that if you do not use the resin continuously, you will get a (low) tds reading when you next start using it and will have to 'run off' a certain amount before it returns to a 0 tds reading?

Thanks

[DASERVICES]

Dave,

I am hazarding a guess here , it depends on what size vessel you have and what resin you are using. Like myself you went on the BWCA course and learnt all about mesh size etc..

A couple of guys that I sold resin to use the Cleantech DI vessel which if I am correct the volume is 10 litres. Their TDS went upto 001 and stayed there for ages but I was surprised that it went upto 001 quicker than what it does for me. Rang the supplier and he told me flow rate, volume etc.. has an impact. This info I forwarded on and immediatley TDS went back to 000 .

Mike,

Not using resin continuously will have no effect on tds levels, it will not drop down once it rises only when you give it a shake etc.. it drops for a period. One things that I have noticed if you empty your di vessel of water after each fill this is one of many factors that helps prolong your resin. Stagnent water in your di vessel can have an impact on your resin life.

Doug

[Mike 108]

Doug (D A Services) - Thanks, but can you look at the reply from macmac (High Reach) time 12.41 - next to the last paragraph in the Purolite specification.

What does that mean?

Thanks

Mike

[DASERVICES]

Mike,

Are you reffering to this statement :-

Water may be passed either intermittently or continuously at flow rates up to 40 bed volumes per hour, depending upon the total dissolved solids of the water to be treated. Where use is intermittent, the provision of a recycle system will ensure that the treated water quality is the best possible. Alternatively, after a period of shutdown, the first water obtained when starting up can be discarded until the quality is satisfactory.

If so sorry do not know what it is reffering to but can ask.

[Mike 108]

Doug - Yes, that is what I was referring to.

If you find out anything you can post it on here or email me.

Thanks

Mike

[DASERVICES]

Will do.

[Moderator David@stives]

Mike

You are a funny guy.

I use 3 vessils a 25 litre and 2,-- 18 litre vessils

So my water goes through 61 litres of resin on its travels to my van, some times i lie them downd and turn them upside down.
I have even got the kids to roll them around the garden.

It takes long enough to fill the van as it is without turning the flow rate down (which i have noticed doesnt do much if anything)

One thing i have noticed nothing much happens.

You cant teach your Grannie to suck eggs.

Been there , done it tried it.

I think i will have a go with Dougs resin and see how that goes.

[Moderator David@stives]

p.s

Dont forget i am using between 1000 and 2000 litres every single day.

[macmac]

macmac, he can't do it at half the pressure, cuz he fills up the van directly, not in a holding tank, so time is of the essence.

What exactly do you mean with shaking the vessel the right way, is there some sort of dance I should perform?

Yeah i know but what i was going to suggest is that he fills statics then these will fill his van tank, however, you can'y teach an old dog new tricks & if he's happy to over 1k per year on resin then thats fine & his supplier will be even more happy
As for shaking the vessel- i've done with this thread & tbh can't be arsed banging my head against a brick wall, as they say- it's no good knocking if there's no one in

Tony

[Moderator David@stives]

Tony 

Dont be like that,dont go 

if you read the back posts , you will see i am about to invest in some tanks, the first phase in trying to make water cheaper.

[Mike 108]

Dave Morris

Sorry, Grannie! : :  

[Moderator David@stives]

macmac
how much water do you use a week.

I know you have to give the resin time to do its work, i have spokn to Alan Matthews quite a bit about this subject.
Resin should be able to handle 10 litres a minute going through 50 litres of the stuff.

There are guys here using 2 litres a minute on there vans going through 1 litre vessils , so 10 going through 50 plus should be more than enough.

[Mike 108]

Yeah - your right.  I can see where you're coming from now.

Sorry for butting in.

Mike