PTFE filter for 47mm Vacuum filtration and pre filtering

[focussvt]

I was looking around for some PTFE 47mm unsterilized filters for a vacuum filtration setup and was thinking it might be easier if I prefiltered with a larger than 0.22 um filter. I was looking at these filters here in the link. Has anyone with experience on this done anything similar?Hydrophobic PTFE Membrane

 

[Photon]

I was looking around for some PTFE 47mm unsterilized filters for a vacuum filtration setup and was thinking it might be easier if I prefiltered with a larger than 0.22 um filter. I was looking at these filters here in the link. Has anyone with experience on this done anything similar?Hydrophobic PTFE Membrane

It'll work
But why
Just how dirty are your raws?

 

[focussvt]

Hopefully not terrible, the worst are some QSC raws from last December of Tren A, Test E and Sustanon at 90%, 91% and 91% respectively. I was thinking more of an unsterilized pre-filter step so that when I do the final sterilized filteration with the .22 um, it doesn't get clogged up part way through the batch. I've done something similar with .45 um and then .22 um syringe filters in the past.

 

[Walter Hype]

I was looking around for some PTFE 47mm unsterilized filters for a vacuum filtration setup and was thinking it might be easier if I prefiltered with a larger than 0.22 um filter. I was looking at these filters here in the link. Has anyone with experience on this done anything similar?Hydrophobic PTFE Membrane

Pre filter with glass fiber pre filter pad designed for this. They are sold all over for 47mm sizes. They are better on paper than smaller filters because they are thicker. So rather than filtering with pure pore size they filter by creating a deep network of torturous paths that actually end up filtering smaller then even 0.22 micron due to the natural chaotic network of their lattice

This will result in a longer life of your main final filter. You can stack this right on top of your 0.22 micron filter.

Some old heads do 0.45 micron as a pre filter and that works too. But glass fiber pre filter works much much much better. I'm going to assume you need to filter volume. This is the most efficient path for this route.

Lots assume 0.22 micro filters purpose is to filter dirty oil and make it clean. Wrong. Very wrong.

The only purpose of a 0.22 micron filter is to decrease bacterial load in the final oil stream. Your pre filters are designed to catch the things 0.22 micron would slow down with. Hair. Dust. Skin cells. Ect ect ect. Any of that will clog 0.22 and give it less room to do it's real job.

Sterile filtering.

Pre filtering is smart. Efficient and gives little bitty 0.22 micron room to work best.

 

[focussvt]

Pre filter with glass fiber pre filter pad designed for this. They are sold all over for 47mm sizes. They are better on paper than smaller filters because they are thicker. So rather than filtering with pure pore size they filter by creating a deep network of torturous paths that actually end up filtering smaller then even 0.22 micron due to the natural chaotic network of their lattice

This will result in a longer life of your main final filter. You can stack this right on top of your 0.22 micron filter.

Some old heads do 0.45 micron as a pre filter and that works too. But glass fiber pre filter works much much much better. I'm going to assume you need to filter volume. This is the most efficient path for this route.

Lots assume 0.22 micro filters purpose is to filter dirty oil and make it clean. Wrong. Very wrong.

The only purpose of a 0.22 micron filter is to decrease bacterial load in the final oil stream. Your pre filters are designed to catch the things 0.22 micron would slow down with. Hair. Dust. Skin cells. Ect ect ect. Any of that will clog 0.22 and give it less room to do it's real job.

Sterile filtering.

Pre filtering is smart. Efficient and gives little bitty 0.22 micron room to work best.

Something like this?Glass Fiber Membrane Filters, GA-100, 47mm, 100/Pk