What is "best" pump for waste oil applications
What is "best" pump for waste oil applications
(OP)
I am stuck...at our facility, we use a Flowserve rotary gear pump to feed waste oil to our boilers which provides steam for our process. The oil is treated with sulfuric acid to help remove the Al fines and over the viscosity. The viscosity is between 20 to 50 cP and Al fines are around 20 microns or less, temperature is about 100 degrees F. So far, they have purchased several of the same pumps with the same result -- within two weeks it fails. I took the pump apart and did see mild scratches on the shaft but no gear damage. The pump is a 10 gpm at 100 psi, it uses a herringbone gear, and uses babbit bearings with the waste oil as the lubricant. The 10 Hp motor turns at 1800 rpm.
I feel the speed should be by half and the bearings should be lubricated outside the pump cavity.
I feel the speed should be by half and the bearings should be lubricated outside the pump cavity.





RE: What is "best" pump for waste oil applications
RE: What is "best" pump for waste oil applications
RE: What is "best" pump for waste oil applications
The Viking Rotory Lobe type works well for us in acidic and gritty asphalt and slop oil services...
RE: What is "best" pump for waste oil applications
For pumping neutral or corrosive liquids, uncontaminated or abrasive liquids, liquids containing gases or which tend to forth, and liquids of high or low viscosity, including liquids containing fibrous and polid meterial,
There are many manufacturers around:
http://www.ctp.com.cn/monopump.htm
http://www.netzsch-pumps.com/
RE: What is "best" pump for waste oil applications
1. Get rid the fines
2. use harder materials
3. lower rpm logically can extent the lifetime
4. Read Karrassik
hope can help.
RE: What is "best" pump for waste oil applications
RE: What is "best" pump for waste oil applications
I partially agree with "stewbaby" above, a Viking pump may be best....I do not think a very expensive "progressing cavity pump" is appropriate
I think that you may be using the wrong type of "rotary gear" pump. Is your pump a "Flowserve GAX cast iron series, double-helical, herringbone type gear pump" ?
If so consider using an "internal gear" pump.....I have seen a lot of these on "dirty oil" service
See:
www.vikingpump.com/products/internal_gear_pumps/interna...
MJC
"There comes a time in the affairs of man when he must take the bull by the tail and face the situation." W.C. Fields
RE: What is "best" pump for waste oil applications