Liquid CO2
Liquid CO2
(OP)
Hi all,
Am kinda new here. Can the experts advise on liquid CO2 pumping specs.
SG 1.1
Temp. -60F
Am not sure where to look for info
Thanks in advance
Am kinda new here. Can the experts advise on liquid CO2 pumping specs.
SG 1.1
Temp. -60F
Am not sure where to look for info
Thanks in advance





RE: Liquid CO2
RE: Liquid CO2
The biggest problem we had with out pumps was mechanical seals. CO2 will absorb into some o-rings resulting in explosive decompression when the pressure is removed. Seal faces can become frozen together if moist atmosphere is allowed to contact the ID of the seal faces. We used a CO2 vapor quench to keep the seal face area dry and this helped some. We used special face materials and light loading to reduce heat generation. We considered converting to a gas seal, but did not have CO2 vapor at high enough pressure available.
If I was starting with a blank piece of paper to design a CO2 pumping station, I would use horizontal, overhung pumps. I would have a continuous vent through an orifice back to the vapor space in the tank to automatically vent the high point of the case and the seal chamber (API Plan 13). I would use a single seal with a gland bushing and a CO2 vapor quench on the atmosphere side. I would insulate the pump very will with cold-service insulation. And I would have very specific procedures for my operators regarding flooding and venting prior to start-up.
Johnny Pellin
RE: Liquid CO2
David