Flowserve ESP2 - Manual (Page 13)

ESP2 USER INSTRUCTIONS ENGLISH PCN-(71569292) 4-12
Page 13 of 64
3.4.3 ESP2 Bearing Materials
CARBON - Carbon graphite, especially developed
for sump pump applications, is chemically inert.
The self lubricating properties of graphite
present in the carbon bearings enhances its
dry running capabilities.
BRONZE - SAE 660 Bronze (grooved when
grease lubricated).
CAST IRON - ASTM A48 Class 30 iron (grooved
when grease lubricated).
RUBBER - Resilient compounded rubber, fluted to
allow abrasives to wash away.
VITON - Resilient Viton, fluted to allow handling of
dirty corrosive liquids not able to be handled by
carbon or rubber.
TEFLON - Fiberglass & moly-disulphide-filled, with
low cold flow, high tensile and elongation char-
acteristics.
All bearing materials are enclosed in an AISI-316
shell (ex. Bronze & Cast Iron). Higher alloys are
available (grooved when grease lubricated).
FIGURE 3-4: ESP2 Bearing selection
Bearing
Material Max. Product
Temp. Pumped Liquid Lubricant Shaft
Material
CARBON 177°C
(350°F) Most clean acids,
genera! chemical, cold
or hot water, cleaning
fluids, gasoline,
kerosene, jet fuels External Flush
Product Lube Steel or SS
Steel or SS
BRONZE 82°C
180°F Water and other
compatible liquids External Flush
Product Lube
Grease Steel only
Steel only
Steel only
CAST IRON 82°C
(180°F) Water and other
compatible liquids
including alkaline
caustics External Flush
Product Lube
Grease Steel
Steel
Steel
RUBBER 71°C
(160°F) General abrasive liquids
compatible with rubber External Flush
Product Lube SS only
SS only
TEFLON 177°C
(350°F)
Liquid Lube
Clean acids not
compatible with carbon External Flush
Product Lube SS only
SS only
TEFLON 82°C
(180°F)
Grease Lube
Clean acids not
compatible with carbon
Grease SS only
VITON 149°C
(300° F) Dirty acids not
compatible with carbon
or rubber
External Flush
Product Lube SS only
SS only