Brochure

20 | Fisher
®
Olefin Production Solutions
Amine Pump Recirculation Valve
Maintaining the proper ow of lean amine to the acid gas absorber
is necessary to ensure sufcient removal of carbon dioxide (CO
2
)
and hydrogen sulde (H
2
S) from the cracked gas stream. The lean
amine pump ensures the stable ow of amine to the absorber.
The amine pump recirculation valve is most commonly used to
facilitate startup and commissioning as the acid gas absorber is
brought to capacity. This valve controls the pump discharge ow
that is routed back to the suction side of the pump. When needed,
the recycle ow increases the suction pressure to keep it above
the vapor pressure of the amine. As a result, the amine pump
recirculation valve must be responsive in order to protect the
pump from cavitation damage.
Due to the high pressure differential from discharge back
to suction, the valve trim must be capable of mitigating the
potentially damaging effects of cavitation as it recycles ow. Any
unplanned maintenance on these valves due to cavitation damage
can bring the amine pumps down and reduce plant throughput.
To learn more about how Fisher
anti-cavitation technologies can
help prevent damage to your
valves, view an animation video
at www.FisherSevereService.com
or scan the QR code.