Glass filtration setup or bottle top?

[narta]

I have been brewing the past 17 years.

The golden standard when I started, whatman puradiscs, have a PTFE hydrophilic membrane. Hydrophobic membranes are used in gas filtration since we are not pre wetting the filter with alcohol in order to make them aqueous compatible.

I hope you are speaking from experience and not from something you read in the internet. Here is the revelant info

 

[Bigguy81]

I have been brewing the past 17 years.

The golden standard when I started, whatman puradiscs, have a PTFE hydrophilic membrane. Hydrophobic membranes are used in gas filtration since we are not pre wetting the filter with alcohol in order to make them aqueous compatible.

I hope you are speaking from experience and not from something you read in the internet. Here is the revelant infoView attachment 173602

Omg. Yes I'm speaking from personal experience and plenty of it. You are right hydrophobic membranes are used in gas filtration I said that before but they are also used to filter aqueous solutions, and why don't we pre wet the filter? Like you said you have to prewet the filter you are correct, and you can do that with a number of different things. Personally I use BA, but you could use MCT just as easy, and it will wet filter as well as activate it, then you will be filtering 3 times faster. The only way you can filter the same speed with a hydrophilic membrane is if you're using a capsule filter like a whattman polycap or a pall acropak.. Remember there's more than one way to skin a cow.. I just happened to like the most efficient way.

 

[narta]

Omg. Yes I'm speaking from personal experience and plenty of it. You are right hydrophobic membranes are used in gas filtration I said that before but they are also used to filter aqueous solutions, and why don't we pre wet the filter? Like you said you have to prewet the filter you are correct, and you can do that with a number of different things. Personally I use BA, but you could use MCT just as easy, and it will wet filter as well as activate it, then you will be filtering 3 times faster. The only way you can filter the same speed with a hydrophilic membrane is if you're using a capsule filter like a whattman polycap or a pall acropak.. Remember there's more than one way to skin a cow.. I just happened to like the most efficient way.

If speed is the target then a capsule filter with a peristaltic pump should be used as it filters faster and far more liquid making them the most efficient

 

[carn1t9]

@Bigguy81 and @narta

1)How much oil can be filtered without any problem using a 2.5inch capsule filter (1200cm³) ?

2)As I couldn't get my hands on pall capsule filter where I come from, i contacted a Chinese manufacturer via Alibaba. He asked me which connection type I'd like to purchase and gave me these options 0.5" Tri clamp, 1.5" Tri clamp 9/16" hose barb, 1/2" NPT, 1/4" NPT.

3) Can you help me pick a peristaltic pump from this or give me an idea of how to choose a peristaltic pump?

Baoding Shenchen Precision Pump Co., Ltd. - peristaltic pump, oem peristaltic pump

Baoding Shenchen Precision Pump Co., Ltd., Experts in Manufacturing and Exporting peristaltic pump, oem peristaltic pump and more other Products.

scby.m.en.alibaba.com

4)What's your take on buying a pump which can be used to do both filtering and filling ? I'm more keen on lightweight pump which will primarily need to help with filtration.

5) Most peristaltic pumps and motor have a max temperature of
40°C(pump)
60°C(capsule filter)

What would be the ideal temperature of oil for filtering?


Thank you in advance!

 

[narta]

1) Till it clogs depending raws and oil debris
2) 9/16" hose barb
Peristaltric pumps need to be strong enough to push oil through the filter and thats it
5) Warm enough 40 C is fine


Whatever you do, don't try to start a lab. Bad decision all around and prison ain't a happy place

 

[filtros29]

Hola, tengo la posibilidad de comprar un filtro de cápsula PTFE Whatman de 0.22 micras, me pregunto cuál es la diferencia entre el filtro de cápsula y el filtro desechable de 0.22 micras que se puede encontrar en todas partes, incluso en Aliexpress.

 

[narta]

Hola, tengo la posibilidad de comprar un filtro de cápsula PTFE Whatman de 0.22 micras, me pregunto cuál es la diferencia entre el filtro de cápsula y el filtro desechable de 0.22 micras que se puede encontrar en todas partes, incluso en Aliexpress.

Capsule filters are bigger, need a peristaltic pump and can be re-sterilized in order to be used more that one time. Disposable filters are smaller and one time use.

 

[filtros29]

Capsule filters are bigger, need a peristaltic pump and can be re-sterilized in order to be used more that one time. Disposable filters are smaller and one time use.

Hello @narta, thank you very much for your help. I understood that the Whatman capsule filters also got clogged and had to be thrown away. By the way, before I was referring to, instead of the Whatman, using a disposable filter with a reusable filter holder, like this one attached. As I imagine it would be the same, but cheaper since the 0.22 micron PTFE filters are easy to find and are very cheap.
Still, both seem like good options. I'm preparing gear for a year and I don't want to have to wait like last time with syringe filters.

 

[narta]

Hello @narta, thank you very much for your help. I understood that the Whatman capsule filters also got clogged and had to be thrown away. By the way, before I was referring to, instead of the Whatman, using a disposable filter with a reusable filter holder, like this one attached. As I imagine it would be the same, but cheaper since the 0.22 micron PTFE filters are easy to find and are very cheap.
Still, both seem like good options. I'm preparing gear for a year and I don't want to have to wait like last time with syringe filters.

For personal use, syringe filters are fine. .22micron 33mm diameter, filter while hot.

The reusable ones are pricier (you want a 50mm at least), you will need to source presterilized disk filters and sterilize the housing before usage. Plus you need a decent peristaltic pump to operate it.

The whatman capsule filters are good up to 5L I think and have a much better flowrate than the ones you posted due to their higher contact surface area. But they are disposable.

 

[filtros29]

Para uso personal, los filtros de jeringa están bien. .22micron 33mm de diámetro, filtro mientras está caliente.

Los reutilizables son más caros (desea al menos 50 mm), deberá obtener filtros de disco preesterilizados y esterilizar la carcasa antes de su uso. Además, necesita una bomba peristáltica decente para operarla.

Los filtros de cápsula whatman son buenos hasta 5L, creo, y tienen un caudal mucho mejor que los que publicó debido a su mayor área de superficie de contacto. Pero son desechables.

Indeed, you were right, I just tried using the housing with the disposable filter and it's crap, the flow rate is literally one drop per minute, I suppose it's also due to the PBT tube which is very narrow, I tried to change it for one with a larger internal diameter and oil came out everywhere, thank goodness I did the test with only oil.
Any suggestions other than putting plastic or metal ties on it?

 

[narta]

Any suggestions other than putting plastic or metal ties on it?

That's probably the best course of action

 

[filtros29]

That's probably the best course of action

I have it solved, I have filled the female tube to adapt it to the male, I have a decent peristaltic pump but the pipe keeps bursting, it's like hitting a wall, not a filter.

 

[filtros29]

Ok, problem solved, if this happens to you check that your filter has the correct direction

 

[Bigguy81]

Ok, problem solved, if this happens to you check that your filter has the correct direction

Smoot side facing up, and rough side down?

 

[filtros29]

By the way, I know this has nothing to do with the topic, but does anyone here sterilize their vials in an autoclave with the oil already inside? I mean, I have the vials already sterilized and dried, once they are filled and filtered I normally seal them and that's it, but recently I've seen that there are people who sterilize everything together to finish the process, sounds good, but wouldn't this poison the benzyl benzoate and benzyl alcohol? I mean it's 138º Celsius, wouldn't that also degrade the hormone?

 

[filtros29]

Hi @Bigguy81, the smooth side is where the oil comes out.