Flowserve Guardian Sealless Metallic - Manual (Page 26)

GUARDIAN USER INSTRUCTIONS ENGLISH 71569212 08-11
Page 26 of 68 flowserve.com
4.6.5 Auxiliary equipment
4.6.5.1
External flush option E01
Flush option E01 is the use of a recirculation from
discharge or an external process compatible source
through the driven section and a return to process.
Referring to Figure 4-17, determine the inlet location
for the flush fluid. It should be in either location “1JI”
or “1HI” (1JI is standard). Hook up external flush
lines and make sure the required inlet pressure
ensures that liquid is flowing into the pump (1.0 to 1.4
bar [15 to 20 psi] margin over containment shell
pressure). The external flush should start running
either before the pump is rotating or when the pump
starts to rotate.
If flush option E01 is specified, failure
to provide external flush before starting the
motor/pump could result in bearing damage.
Always install a check valve in the inlet
flush line as close to the pump as possible to avoid
reverse flow in the flush line.
Figure 4-17: External flush inlet locations
Figure 4-18: External flush option code E01
Figure 4-19: External flush – cutaway view
4.6.5.2
Piping connection - bearing housing
cooling system
Make connections as shown below. Liquid at less
than 32 °C (90 °F) should be supplied at a regulate d
flow rate of at least 0.06 l/s (1 gpm).
Figure 4-20: Oil cooler - Group 1 schematic