Selecting the Proper Oil Pump

Pumps, Oil Transfer and Centrifuge Feeding

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There are several types of pumps such as centrifugal, gear, vane and diaphragm. Some pumps are well suited for use with oil and others may or may not be. The type and viscosity of the oil also determines which pumps are viable.  Thin oils may be moved faster and thick oils require high torque. Pumps are selected depending upon the application such as oil collection, transfer, blending or centrifuge feed.  Generally, centrifugal pumps are not suited to oil transfer. Centrifugal pumps are high volume-low viscosity pumps that require water thin liquids. Oils are too thick and burn up the motors on centrifugal pumps in a few minutes.

Oil Collection: Because waste oil may have a variety of contaminants such as water, dirt, fish parts and leaves among other things, the best collection method is a vacuum tank. The next best option is a gear pump. Gear pumps are relatively inexpensive, compact and powerful. They transfer oil quickly and reliably. However water is often found at the bottom of waste oil tanks and this is both bad for a gear pump and bad for the oil. When collecting oil with a gear pump, do not pump from the bottom of the waste oil tank, but come up a few inches to minimize water collection.

All but the largest diaphragm pumps are too slow for oil collection. Large diaphragm pumps are both expensive and &#; large, making them a poor choice for oil collection.

Transfer: Gear pumps are king of oil transfer. They are inexpensive, fast and reliable making them the best choice for quick oil transfer.

Gear Pump Selection: Oil viscosity and transfer rate dictate they size and speed of the gear pump. High speed pumps require thin oils. Low speed-high torque pumps transfer thicker heavier oils. Colder temperatures cause oil to thicken and motor oil is generally regarded as thick especially at 50°F and below. High speed pumps run at rpm and low speed pumps run at rpm.

Blending: Gear pumps are good and blending and this is an advantage if you are mixing a batch of oil. Their superior blending ability also creates oil-water emulsions if water and oil are sucked up during oil collection.

Centrifuge Feeding: The best pump for centrifuge feeding is a small pneumatic diaphragm pump. They require minimal air input and the output of these pumps is easily adjusted by varying the air pressure. The output may be shut off with no damage to the pump and it does not require a bypass valve. The diaphragm pump is gentle with the oil and does not &#;blend&#; the contaminants into the oil. Nitrile or neoprene diaphragms are used for mineral oils. Viton diaphragms are used for vegetable oils and biodiesel.

Gear pumps are a very poor choice for centrifuge feeding.  Only the very smallest capacity gear pumps match the centrifuge flow. Gear pumps can not be turned down without a bypass valve or variable frequency drive. Electric motors heat up when run much below their rated frequency and gear pumps superior blending ability thoroughly mixes contaminants into the oil making cleaning more difficult.

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What's a good used oil pump?

thefoolishfarmer

Posted 2/9/ 16:35 (#)
Subject: What's a good used oil pump?

South cental Ohio

If you want to learn more, please visit our website Baic Oil Pump.

I've finally had it !!! I have everything set up and have been using my waste oil furnace for a couple of years with excellent results- but- I've discovered today that when it's extremely cold outside ,( which it has been for a long period of time), used oil is like tar and I can't get my make-shift transfer pump to pump from my barrels into my larger main storage tank. What's the BEST pump I can buy to solve my problem? I know some of you guys have run into this ordeal and I am grateful for any replies to base my purchase on. One more question--- if a barrel of oil would happen to have a tiny bit of water in it, would me pumping it cold-(water should be frozen)- am I separating the water out by leaving it in the barrels? Hope you get what I'm asking and I'm sorry for the extra long post. Thanks! greasegun

Posted 2/9/ 16:41 (# - in reply to #)
Subject: Re: What's a good used oil pump?

W.C. Mo.

Move the barrel inside the day before transfer??????

Posted 2/9/ 16:44 (# - in reply to #)
Subject: Re: What's a good used oil pump?

Check surplus center. They did have a good one. GinNB

Posted 2/9/ 17:53 (# - in reply to #)
Subject: Re: What's a good used oil pump?

ARO makes a good air powered diaphragm pump. Your local tire shop likely has one for pumping calcium into and out of tires. As for pumping water, you might get lucky and have most of it separate out and freeze in a chunk but I've seen slush and ice shards get pumped with frigid oil. Same thing with diesel. I told the fellows not to use the diesel out of a tank we had in the yard because it had water in it. Well, they decided to do a little thinking and figured I was wrong because it was cold out and the ice wouldn't pump out. Guess who had to deal with water in the diesel the next day when it thawed out in the tractor tank and the tractor stopped working?? NH

Posted 2/9/ 19:52 (# - in reply to #)
Subject: Re: What's a good used oil pump?

Gilby,ND

Gilby,ND

Paddle pump is what we use, pumps 85w140 pretty good from drain cart to waist oil mini bulk, not the fastest but my opinion the best option

http://www.jmesales.com/product/loren-simers-original-bronze-paddle...

Edited by NH 2/9/ 19:53

dave morgan

Posted 2/9/ 23:37 (# - in reply to #)
Subject: RE: What's a good used oil pump?

Somerville, Indiana

This is a 'here thing' so take it for what its worth...Industrial users have went to pumping thick liquids with air powered diaphragm pumps, they don't take a lot of air to work and move thick oil at a fairly decent pace...About a 1 inch intake hose with a 3/4 exit hose...Have used the pumps to clean up crude oil spills, just need to watch and keep mud from entering the suction...The price is very reasonable once the right guy is up on what we use it for, usually the pumps gets used one time and leave with the empty tank...Cost varies from free to $100, be sure the boss at the factory knows what is going on or the fellow selling the pump may be in a tight place if someone makes a big deal out of selling excess that isn't worth spending factory workers' time to sort out.

Bottom line is the diaphragm pump is the best deal we have found to pump used oil, etc., and work good at it...Gear pumps are bad about not working in cold weather, and have a low input in warm weather, so we got away from them...If the diaphragm pump loses output, just unbolt and clean out the mud and settlement and all is well again. durallymax

Posted 2/12/ 01:58 (# - in reply to #)
Subject: Re: What's a good used oil pump?

Wi

Contact us to discuss your requirements of foton spare parts dealer. Our experienced sales team can help you identify the options that best suit your needs.

Graco Air powered diaphragm. We went through a bunch of expensive other setups before this one. Pumps faster than any of them, very reliable and primes easily. We have a Y strainer befor eours which helps keep most of the crap out of it.

We move our totes/barrels inside and drop the suction wand in immediately so it hits the ice at the bottom, then raise it an inch and clamp it at that height.