Flowserve ESP3 - Manual (Page 15)

ESP3 USER INSTRUCTIONS ENGLISH 26999943 08-11
Page 15 of 64
3.4.6 ESP3 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 enhance 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 & molybdenum disulphide
filled, with low cold flow, high tensile and
elongation characteristics.
•
ARHT - Chemical and wear resistant bearing
material developed by Greene, Tween & Co.
(grooved when grease lubricated).
All bearing materials are enclosed in an AISI-316
shell (ex. Bronze, Cast Iron & ARHT). Higher
alloys are available (grooved when grease
lubricated).
Figure 3-7: ESP3 Bearing selection
Bearing Material Max Temp Liquid Pumped Lubricant Shaft Material
Carbon
177˚C
350˚F
Most clean acids,
general chemicals,
water, cleaning fluids,
gasoline, kerosene, jet
fuels
External flush
Product Lube
Steel or SS
Steel or SS
Bronze
82˚C
180˚F
Water and compatible
liquids
External flush
Product Lube
Grease Lube
Steel only
Steel only
Steel only
Cast Iron
82˚C
180˚F
Water and compatible
liquids including alkaline
caustics
External flush
Product Lube
Grease Lube
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
ARHT
121˚C
250˚F
Liquid Lube
Dirty acids, hot water
and chemicals
compatible with PEEK
External flush
Product Lube
SS only
SS only
ARHT
82˚C
180˚F
Grease Lube
Dirty acids and
chemicals compatible
with PEEK
Grease SS only