`Air Operated Diaphragm Pumps
`Air Operated Diaphragm Pumps
(OP)
Hi all,
I am pumping a mixture of oil and water, and sometimes dirt out of a sump and into a tank (from the tank it will be gravity fed through an oil/water separation process. I have been told that the best pump would be an air operated diaphragm pump, as it will not emulsify the oil. I need to specify the pump and air compressor, but do not have a good `standard' spec to start from....anyone know of a good source?
Thanks!
I am pumping a mixture of oil and water, and sometimes dirt out of a sump and into a tank (from the tank it will be gravity fed through an oil/water separation process. I have been told that the best pump would be an air operated diaphragm pump, as it will not emulsify the oil. I need to specify the pump and air compressor, but do not have a good `standard' spec to start from....anyone know of a good source?
Thanks!





RE: `Air Operated Diaphragm Pumps
RE: `Air Operated Diaphragm Pumps
As for AODD pump manu'f. see the above, or check with Ingersoll Rand ARO pumps.
Also, make sure that the piping is designed correctly to minimze any flow turbulence; i.e., Reynolds number significantly below the turbulent flow regime. Also use the minimal number of fittings, valves, strainers, etc. that can cause turbulence.
Hope this helps.
saxon
RE: `Air Operated Diaphragm Pumps
If you do go with AODD, however, I'd say Wilden and Ingersoll Rand are your best bets.
RE: `Air Operated Diaphragm Pumps
In my opinion, your choice of pump type depends a lot on how often you have to perform the task.
If the pumping must be done on a frequent basis, ( about daily) then "scipo" and "saxon" are probably correct.....Just be prepared to purchase an expensive pump.
If the pump-out is infrequent AND you have the capacity in your air system, AND you do not want to pay a lot for the pump, go with the AODD.
Also if you have an NEC Class-1 Div-1 (explosive) area the AODD will be the best choice.....
Gimmie a star.......
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: `Air Operated Diaphragm Pumps
You may want to consider using a mechanically driven diaphram pump similar to the type commonly used for dewatering at construction sites. If such a pump is operated with relatively low shaft speeds, the flow rates and fluid turbulence can be more precisely controlled in comparison to AODD pumps.
You may want to consider peristaltic pumps as another possibility.
AODD's have many suitable applications, but from the information that you provided, AODD pumps would be well down on my list of potential choices.
RE: `Air Operated Diaphragm Pumps
I share MJCronin's opinion. In my platform, all the slop oil pump and chemical injection pump are AODP pump. it mainly depend on these factor below.
1. Corrosion (AODP pump will have good performance if adequate material of diaphagram and valve have been seclected.
2. Class of your pump location. (just like what MJCronin said "Also if you have an NEC Class-1 Div-1 (explosive) area the AODD will be the best choice". My ADOP pump is located in explosive area.)
3. frequency. in my application, AODP pump is runned intermittently.
4. Cost. the price of ADOP pump is cheaper than others. but if you have to buy the new air compressor for it, I don't think it is a good idea. you should compare with other pump.
5. Maintaince (now my ADOP pump need replacing the diaphragm every half year.)
Above, I only tell you about my application. I hope it is helpful to you.
David yang
Dec 27, 2003