time for a change.

[GedsJeep]

ok.

i was going to ask about nylon till you mentioned the steel mesh.

quick blast with warm water and away again.

but the nylon is squeezeoutable.....

tell you what, unless its gazillions of quids it could turn filtering on its head.

[greasemonkey]

I reckon a steel mesh at tiny microns is going to be awful expensive.
Could be wrong, but it just strikes me as being pretty labour intensive and fiddly to make. Like, how do they make the holes, then coat them in whatever protective coating they use, and still keep holes that small accurate?
Different story with a bigger hole, because the thickness of the coating is not such a great proportion of the hole size. Possibly why fabric is so much more popular.
Worth asking though.

[GedsJeep]

5 micron nylon @1% open is 78 quid sqm.

6 micron nylon @5% open is 72 quid sqm

sorbtex is like rocking horse shit and they can t give samples of that.

so, how many bags could you get out of a square metre?

and the micron rated steel was telephone numbers.

[greasemonkey]

By my calculations, if you cut it in half, you get two bags, at approx 42 litres each, so four bags at 20 litres. So a shade less than £20 a bag.

Then you gotta make them, which isn't gonna be super expensive, nor very fiddly really, but it will loose a bit of volume.

I have been working in the blistering sun all day, so I wouldn't bet the house on my calcs.

Good effort getting the info. Tidy.
Shame about the mesh being crazy money.

[Diysurgeon]

Some people cut 3 or 4 holes into a top of a barrel and put 32 inch sock filters into each. This might help speed things up. Also filter bags are not 100% efficient they range from 80 to 90%. That's why I double filter my oil to one micron. Yes I am " Force10skodaboy" n the bay. I don't use the nylon bags but smallest micron nylon bags I have are 100 micron. It is possible to get 10 micron but delivery time could be about 4 weeks.

[GedsJeep]

i have 4 socks of that (or close enough) length. the bugbear is the cleaning.

when the socks are new they filter great, but unless you wash them, you can never fully clean them. so, each subsequent batch is done through a partially blocked sock. also when you wash them they can take 24 hrs to dry, losing a days filtering.

thats why i thought of a nylon mesh, as it "should" be easier to clean.

perhaps you could compare for us?

secondly, what is the difference between polyester felt and the "other felt" as seen on eblag.

thirdly, how many bags would you be able to get from 1sqm?

fourthly, what would you charge to make bags if materials were supplied?

finally, how much would the 10 micron nylon bags be?

Thanks and sorry for all the questions.

[dgs]

Have you ever tried petrol to wash them with. Methanol works great on the ones used for bio.

Diysurgeon, I bought a 0.5 micron sock off you @ 3 years ago, it works great. I always thought it was a sort of nylon material it was made from.

[GedsJeep]

just went and did that now, but misfuel is valuable up here......

cleaned them up a treat, thanks.

now i just need to work out what im buying next......

[GedsJeep]

spoke to these people today.


http://www.alliedfilter.co.uk/


much more helpful.

size 2 bags (7"x32") in 5 micron nylon mesh would be £30 per bag. now i was prepared to pay that, but it seems they wont last. they get a bit fragile the tighter the weave.

the 15 micron steel mesh would also break down over a particularly short period.

so i asked about the difference in polyester felt and standard felt.

the standard has more particle retention than the polyester.

nope, i didnt know either.

what we will see with the polyester felt is a "caking" of the inside as the crud forms a layer. with the standard felt a lot more is absorbed into the fibres of the felt.

they can supply direct, but diysurgeons prices are better.

so, its either 10 micron mesh or 5 micron polyester.

hmm

[Diysurgeon]

Hi

I don't make the filters myself but import them in fairly large numbers. I will get some 10 micron nylon mesh ones to test with my next order, which will be in about four weeks. The cost of these is a lot more than the normal polyester felt. They would be in the region of £12 each.

[GedsJeep]

just gone for some of mikes polyester felt 5 micron 32" jobs.

can get some work done then 

[Diysurgeon]

Dgs - the 0.5 micron filters I sell are the polyester felt ones.

Another way to clean them is turn them inside out and pour warm water through them. The disadvantage is you have to let them drip dry.

With my filters I made a "cap" for them so it's is possible to pump the oil through them under pressure. This will quicken the filtering process. I put pictures of this on the other site a few years ago. I Came up with this as I pumpp my oil from barrel to barrel and on occasion left it unattended to return with oil all over the floor!! At least with the cap it stops the oil from overflowing out of the bags.

This is an old version, I have since change the design so you don't need all the bolts.

[simonallen]

I was always under the impression that it was a bad idea to pressure filter through socks because the pliable nature of them means you could end up opening the holes in the bags to bigger than what they are meant to be (10 micron etc)

[GedsJeep]

been busy so i couldnt reply.


got these the other day thanks to mike and havent really had chance to test them fully.

as i use a lot of oil a week (48L dontcherknow ) my final drum is a 210L that i pump into four cubbies at a time, then fill the drum up again (or the filters as has been the case ) so its full for the next time....

now normally i refill the filters with a 40LPM pump, and the three of them are left to run through till the next day.

i hung one of mikes up and turned the pump on........

and filled it half way......

then turned it off.

i turned it off because it filtered all 80L without filling more than half way......

so in 2 mins i had filtered 80L of oil through one 5 micron sock.

i nearly rang mike to check they werent 100 micron by mistake....

so i did this a few times to dirty the filters and really tried to test them...

and couldnt...

they didnt really block and the one that did i washed in petrol and did exactly the same again......

so, the stitching looks good, the felt inside was like normal felt and the outside was like the same feel as a blown 10" element.

they were thinner than the normal felt, so were easier to clean out and wash with petrol.

overall im pretty impressed and would quite happily buy some more.

i`ll pop back in a few weeks as i have a load to get ready for a holiday so will really be putting them to the test...

Ged.

[GedsJeep]

ok, i had to do it.....

i rang mike....just to make sure....

i went in the shed again and 100L whizzed through so fast that i just had to check.

i`m really impressed with these filters. they are thinner than the standard felt ones, so easier to clean and dry, the flow rate is brilliant.

cant recommend them enough.