
6
Notes for Figure 3:
• Recommendationsareforuseinwaterorothersimilarviscosityliquids.
• Theserecommendationsapplytoproductshavingamaximumtempera-
ture of 71°C (160°F).
• Onverticalequipment,usePlan13toventthesealareaevenwhen
operating in zone B
Cooling Recommendations for PSS II Figure 3
Ifthesealrunshot,checkforpropersealsetting,seeStep7,andchecktheush
line for obstructions.
For special problems encountered during installation, contact your nearest
FlowserveSalesandServiceRepresentativeorAuthorizedDistributor.
Operational Recommendations
Do not start up the equipment dry.Ventairfromthestufngboxbefore
startup.Circulatecleanproduct,Plan11,oracleanuidfromanexternalsource,
Plan32,throughthesealchamberwhenevertheequipmentisinoperationun-
lessoperatinginZoneBofFigure3wherenoushisrequired.
3600
2700
1800
900
RPM
By-pass flush Plan 11, or
Externa
Not Recommended,
Exceeds PSS II
Speed Limitations
Seal Size
Zone
Zone C
(38.1 to
50.8 mm)
1.500 to
2.000"
(54.0 to
76.2 mm)
2.125 to
3.000"
(79.4 to
101.6 mm)
3.125 to
4.000"
(104.8 to
127.0 mm)
4.125 to
5.000"
(130.2 to
152.4 mm)
5.125 to
6.000"
Flush Recommended to Keep Stuffing Box Clean
No Flush Required for Cooling of Seal, Vent Required
Can be Run Dead-Ended Plan 02
Zone B
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