Flowserve Seal Gard - Manual (Page 5)

3 Operation
Following these recommendations will ensure maximum MTBPM of the
Flowserve seal being protected by the Seal Gard.
3.1 A clean source of seal water, or compatible sealing fluid, must be supplied to
the Seal Gard at a constant pressure at least 15 psi (103 kPa) above the
product pressure acting on the seal chamber or stuffing box. The Seal Gard
is constructed of 316 SS and acrylic resin. The acrylic is not compatible with
alcohol or steam. It will resist corrosion by most chemicals. However, do not
expose Seal Gard to steam, alcohol, or other materials that will attack acrylic
resins. The Seal Gard body will turn white and it will be impossible to see the
float to set the flow rate.
3.2 Seal Gard I for a Single Flowserve seal
Clean External Flush, Plan 32
(also for Packed Stuffing Box)
Type of Installation Single Flowserve seal or flush to
lantern ring
Flush Plan 32
Part Codes UKDOOSG1020 0 to 20 gph
UKDOOSG1040 0 to 40 gph
Operation (See Figure 1)
• Open flush supply valve
• Open control valve
• Start up equipment
• Set control valve flow rate adequate to remove seal generated heat and to
prevent product contamination of the seal while limiting product dilution
• Set optional low flow alarm
• Record flow and pressure on the operators log
This arrangement can also be used to quench the outboard side of a single
Flowserve seal, Plan 62; supply buffer fluid between the inner and outer seals of
a tandem Flowserve seal, Plan 52; or supply seal water to the lantern ring tap of
a packed stuffing box.
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