suitable pumps

Collecting, filtering and dewatering of WVO SVO vegetable oil. For Biodiesel producers too.

Moderators: SunWizard, coachgeo

suitable pumps

Postby puravida » Mon Sep 28, 2015 8:18 am

I'm looking to build our own on board centrifuge filtration system with SunWizards beautiful design. looking for a little guidance on the most space-efficient pump we can use without salvaging. Admittedly, I'm not sure what I would be looking for at the junkyard. I found this pump on ebay and I'm wondering if I would work with your design?

http://www.ebay.com/itm/Perfect-12v-Sca ... 5731.m3795

Any help is greatly appreciated!
puravida
 
Posts: 7
Joined: Mon Sep 28, 2015 8:14 am

Re: suitable pumps

Postby SunWizard » Mon Sep 28, 2015 9:49 am

No that doesnt list a a flow rate at a given pressure, and its probably way too low from the max. lift of 15' which equals max of only about 10psi. It needs to put out 1gpm at 90 psi, see the CF thread for links to many pumps that will work. Gear pumps are small, then you need to add a motor or belt to drive it.
YVORMV - Your veg. oil results may vary.
95 Dodge Cummins 4x4 SVO WVO conversion.
81 Mercedes 300D- stock and happy on V80/D20 blend.
Low fossil net zero house- 100% solar power and heat.
SunWizard
Site Admin
 
Posts: 1720
Joined: Mon Dec 11, 2006 2:53 pm
Location: N. Colorado

Re: suitable pumps

Postby puravida » Tue Sep 29, 2015 3:17 am

Thanks for the reply.

I'm looking now at the Oberdorfer 991 on ebay, but I don't see anything less than $80 for the pump alone. I keep reading posts about people finding good pumps and motors on ebay for around $30. Is there something I'm missing? Thanks in advance.
puravida
 
Posts: 7
Joined: Mon Sep 28, 2015 8:14 am

Re: suitable pumps

Postby SunWizard » Tue Sep 29, 2015 9:17 am

Some on ebay are really cheap if used, its supply and demand. $80 is a cheap price for a new one, and about average for used.
YVORMV - Your veg. oil results may vary.
95 Dodge Cummins 4x4 SVO WVO conversion.
81 Mercedes 300D- stock and happy on V80/D20 blend.
Low fossil net zero house- 100% solar power and heat.
SunWizard
Site Admin
 
Posts: 1720
Joined: Mon Dec 11, 2006 2:53 pm
Location: N. Colorado

Re: suitable pumps

Postby puravida » Wed Sep 30, 2015 9:22 am

Thanks, wizard! I just found an n991 for sale that comes attached to a LEESON L12A 114889 AC motor. 1/3 HP at 1425RPM using 220Volts. is this motor strong enough? The ad says : "Paired with the Leeson motor, these pumps can produce about 60psi of preasure at about 1.5 gallons per minute."

I'm wondering if I use a valve to Restrict the flow to 1 gallon per minute, will that bring me to 90 psi? Or is this motor simply not strong enough?
puravida
 
Posts: 7
Joined: Mon Sep 28, 2015 8:14 am

Re: suitable pumps

Postby SunWizard » Wed Sep 30, 2015 10:33 am

Yes thats about the right HP but a DC motor is better for onboard unless you have a 220V inverter. Flow versus pressure is a curve on any pump. See the Oberdorfer website for the specs on the N991 which I have proven to work well. You don't want a valve to restrict flow, the CF jets do this. If you look at mine, the valve is to let extra flow bypass the CF so it doesn't exceed 90psi.
YVORMV - Your veg. oil results may vary.
95 Dodge Cummins 4x4 SVO WVO conversion.
81 Mercedes 300D- stock and happy on V80/D20 blend.
Low fossil net zero house- 100% solar power and heat.
SunWizard
Site Admin
 
Posts: 1720
Joined: Mon Dec 11, 2006 2:53 pm
Location: N. Colorado

Re: suitable pumps

Postby puravida » Fri Oct 02, 2015 7:26 am

I just found a nice dc motor with the n991 attached...It looks like the one for the job except it has this bizarre plug on the end, has anyone seen this before? I'm wondering if there's an adapter for it or I'll need to cut it off and attach a normal 3 prong plug.
Attachments
plug.jpg
plug.jpg (70.97 KiB) Viewed 284 times
puravida
 
Posts: 7
Joined: Mon Sep 28, 2015 8:14 am

Re: suitable pumps

Postby SunWizard » Fri Oct 02, 2015 9:15 am

Yes I have seen that plug. You don't want a standard plug since DC plugged into an AC outlet or vice versa will ruin something. Most often a DC motor is direct wired since a plug can't handle 27 amps. Is it 12V DC, and is your bus 12V? If not, a voltage converter may cost more than the motor.
YVORMV - Your veg. oil results may vary.
95 Dodge Cummins 4x4 SVO WVO conversion.
81 Mercedes 300D- stock and happy on V80/D20 blend.
Low fossil net zero house- 100% solar power and heat.
SunWizard
Site Admin
 
Posts: 1720
Joined: Mon Dec 11, 2006 2:53 pm
Location: N. Colorado


Return to Vegetable oil Collecting, Filtering and Dewatering

Who is online

Users browsing this forum: No registered users and 0 guests