Filtering with diaphragm

[s1036s]

Does anybody filter with a diaphragm pump? Specifically the sandpiper...
Sandpiper Air-Operated Double Diaphragm Pump — 1in. Inlet, 45 GPM, Aluminum/Buna, Model# S1FB1ABWAN5000 | Air Operated Oil Pumps | Northern Tool + Equipment Transfer + Lubrication>Air Operated Oil Pumps-_-109715

I think this is the one I have, but any reason not to put some filters before or after the pump? I dont know about using the bag filters, it may make a mess. I can run the pump at a lower psi to pump less gpm.

 

[LowTech]

I do use a diaphragm pump to filter, but not that one. I use one like that to transfer from their tanks to my collection tanks. After that I've been using a single diaphragm pump to push, NOT suck, through filters (3). I do this only because it's 24v and I can do it when we are in travel mode w/ no air power. I tend to top off the tanks at the end of the day, and when ever we get near half-tank (less stress on the pump to only have to pump 20 gals at a time)
You will need to be careful w/ the filter bases, most will have a by-pass press of 15psi (or so). You will need to keep your press below that, or block the by-pass. I would also recommend putting a press gauge before, after, and between each filter so that you can see which one is clogging up.

 

[gimpyrobb]

The bag filters are only rated to 15psi? Wow.

 

[LowTech]

Yep, they rip out after that
NO I'm using spin-ons and the bases have a by-pass that opens at 15psi

 

[gimpyrobb]

I have contacted a few manufacturers of spin-ons that I use. Many are rated to 100psi. I often run pressures up to 60psi while filtering. 15psi seems like it would take forever.

 

[LowTech]

Where did you get the bases? I'm guessing that you found, or made, some bases that don't have a by-pass?

 

[gimpyrobb]

Correct. I got 200 detroit diesel filters in one GL lot. I went to a scrap yard and grabbed some filter bases for them.