Flowserve ERPN-M - Manual (Page 31)

ERPN-M USER INSTRUCTIONS ENGLISH 02-08
Page 31 of 37
7.3.3 Flushing plan no. 21S according to API 685
Flushing of magnetic coupling is performed according
to API 685 flushing plan no.21S. Thereby the pumped
medium is led to magnetic coupling (connection „F“)
from pump discharge through an orifice and a cooler.
Flushing medium circulates through magnetic
coupling and enters afterwards into pump casing, into
the space behind impeller, (low pressure).
Circulation is necessary for lubricating the bearings
and for eliminating heat caused by the eddy current
losses
7.3.4 Flushing plan no. 31S according to API 685
Flushing of magnetic coupling is performed according
to API 685 flushing plan no.31S. Thereby the pumped
medium is led to magnetic coupling (connection „F“)
from pump discharge through a cyclone separator.
The cyclone separator separates the solids content
from the pumped medium and returns them to
suction.
Clean flushing medium circulates through magnetic
coupling and enters afterwards into pump casing, into
the space behind impeller, (low pressure).
Circulation is necessary for lubricating the bearings
and for eliminating heat caused by the eddy current
losses
7.3.5 Flushing plan no. 31SE according to API 685
Flushing of magnetic coupling is performed according
to API 685 flushing plan no.31SE. Thereby the
pumped medium is led to magnetic coupling
(connection „F“) from pump discharge through a
cyclone separator and a magnetic separator. The
cyclone separator separates the solids content from
pumped medium and returns them to suction. The
cleaned flushing medium runs afterwards through the
magnetic separator, which separates even the
smallest metallic parts from the medium. Cleaning of
magnetic separator should be done regularly
independently from contamination of medium.
Clean flushing medium circulates through magnetic
coupling and enters afterwards into pump casing, into
the space behind impeller, (low pressure).
Circulation is necessary for lubricating the bearings
and for eliminating heat caused by the eddy current
losses.