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19
OPERATING MANUAL
VERSION 01/2013
ORDER NUMBER DOC 2333538
5.3.2
RECOMMENDED PACKINGS
5.3
DATA
5.3.1
MATERIALS OF WETTED PARTS
Housing
Stainless steel
Piston
Stainless steel and hard chrome
Valve balls
Stainless steel
Valve seats
Carbide
O-rings
PTFE
Packings
Standard
=
Ultra high molecular weight polyethylene
=
PTFE with graphite
for abrasive materials
Standard combinations
Standard pumps:
Heavy duty (high pressure) pumps:
Hardener pumps in 2-component systems:
WAGNER packings are manufactured in four diff erent materials:
Material
Color
dark brown
Black
Transparent
Leather
PTFE
with graphite
Ultra high molecular weight
polyethylene
PTFE
white
Each material has the following properties, which infl uence the packings:
Mechanical stability
poor
good
good
poor
Friction coeffi
cient
poor
very good
good
very good
Sealing force
good*
good
good
good
Chemical resistance
poor
good
very good
very good
Temperature resistance
good
poor - good
very good
poor