pump selection for liquid propyelne

[naturalgas01]

what kind of pump and manufacturer should be recommended for liquid propylene at saturated condition ? how can i size the pump for boiling propylene at 27 psig ? what should be suction and discharge piping diameter ?

thanks
naturalgas01

 

[nickelkid]

naturalgas01,

For a useful reply you will need to provide additional information. You may want to review:

http://www.mcnallyinstitute.com/The Tutorials/pump_selection.tn002.htm

 

[GaTechTheron]

If you are at the vapor pressure of the fluid, you wouldnt be able to effectively pump it.

 

[bk19702]

You'll definitely need to cool the fluid down somehow to pump it. Whatever seal you use will be special in this application too. Contacting wet seals will require an external fluid to function; the alternative would be a gas seal designed specifically for vaporizing liquids.

 

[offonoff]

you cool the liquid to a temperature such that the rise from the heat of compression and friction does not bring it to boiling? Or are there other concerns?

I have a similar situation and would like to find a suitable pump for CO2. 5000 psi and capable of a few gallons a minute for short periods (10 min).

If only slightly cooled, pumping to this pressure would drive my liquid supercritical. Is that an issue in pump selection? Must the fluid be cooled so that after compression it is still less than the critical temperature?

 

[Longinthetooth]

Nothing special about liquid propylene. Practicaly every depropaniser in the industry pumps liquid C3s at boiling point. Just watch the NPSHR/A and you will be OK. Basic centrifugal should be fine.

 

[dcasto]

nobody can answer this one. Missing discharge pressure required and flowrate.

If the delta P is under 1000, then a centifugal looks good. If the flowrate is under 100 GPM an PD pump looks good. IF flowrate is over 100 GPM centifugal, if, if, if.....


It may call for a combination of a verticle can pump to get NPSH right then a PD pump.

As for line size, could be 1" could be 100 feet, how much do you want to move.