I would like to use two pumps for my processor. I want to use 1" pipe from the tank bottom to a 1" T. The t would feed the inputs to the two blue pumps. The output side of the pumps would be 3/4" pipes to the top of the tank. Anyone run this setup before? I am worried the 1" will not provide enough volume for the two pumps with 3/4" outputs.
Thanks

What two pumps are you using?

If its the little blue pumps, then 1 inch will be plenty.

I would think that there can't be too much if in doubt use 1-1/2". In biulding my new processor I am using 2 of Murphy's big pump's with 1-1/2" suction port's. I chose to use 3" plumbing tee'd at the bottom with bell reducers coming out of the tank. Is this safe as sorry or is this just overkill? Should I drop down to 2"?

Yes, the NT 720 per hour pumps. My stainless steel tank has only one 1" fitting at the bottom, so both pumps have to draw off the one fitting. Thanks

quote:

Originally posted by marvingvx:
I would think that there can't be too much if in doubt use 1-1/2". In biulding my new processor I am using 2 of Murphy's big pump's with 1-1/2" suction port's. I chose to use 3" plumbing tee'd at the bottom with bell reducers coming out of the tank. Is this safe as sorry or is this just overkill? Should I drop down to 2"?

3 inches is a bit over kill but no harm done.... 2-1/2 would have been more than enough.

What I thought but 3" was easier to get than 2-1/2". 2-1/2 was my first choice. plus the bigger drain will make it easier to get thick gly out should I leave it too long. I have a 3" cross the 3rd outlet will be a drain

I will consider it but did not want to reweld another fitting in if in was not required.

quote:

Anyone run this setup before? I am worried the 1" will not provide enough volume for the two pumps with 3/4" outputs.

I do, more or less. I have a 3/4 outlet from the tank to a 1" inlet in the larger pump and a 3/4" inlet in the smaller. The smaller pump has a 3/4" outlet and the larger has a 1" outlet.



A reverse path through the smaller pump provides a second input to the larger pump during processing, so in that case two 3/4" inlets provide for a 1" outlet; backwards of what you propose, and it seems to work OK. If you are using 2 of the smaller pump, I think you'll be fine. If its a bigger one, its not gonna be enough. My big pump creates so much vacuum in the 3/4" inlets that it sucks air through the 1-way valve on the methanol port and collapses the methanol jug.

I just choke the big pumps outlet down some to slow the exit and increase the "residual time" of the fluid in the bigger pump.

OK thanks for the replies.
I think I will give it a try since I have all the parts.
If I don't like it I will redo it with a larger bulkhead fitting.

OK, did it today. Lots of valves because I isolate the pumps and use air to empty the tank. I can also use the pumps separately, one for drying and the other for pumping oil around to other tanks.

Raynor3480_0508.JPG (47 KB, 35 downloads)

Guess I can't post more than one photo at a time.

Raynor3480_0507.JPG (42 KB, 35 downloads)

jdr where did you score that stainless steal tank from??

Do you know if its pressure rated?

Local plumber had it in his dumpster. He traded for some coffee and donuts. I had to cut the top off, remove the bad copper coil and weld the top back on. I put about 150 psi in it and it did not blow up.

wow what a fantastic score.

Im getting a free 372L propane tank from the propane suppliers once they take all there valves or whatever off. You could say Im pretty excited

Poly cone bottom reactors are good, but Im board, Its time to start playing with vacuums..