VALVE UPGRADING • Modified PEEK (BG4330) valve seats to reduce the friction coefficient at raised temperatures. • PEEK seats with PTFE back ring to avoid leakage over the surface roughness on the back side of the seat. • PCTFE seats for cryogenic applications. • UHMWPE for extreme wear resistance. • Don’t copy your PTFE seats, we will make you an optimized design.
Operating temperatures for valve Seats (°C) 400
0.24
Values in graphic = coëfficient of friction up to 150°C 0.28 300 0.15 200
0.12
0.40
0.45
0.14
0.16
0.22
0.35
0.21
0.19
0.28
0.35
0.22
100
0°C
-100
-200
id im -P oly
Me id br
Hy
tal Me Hy
br id
tal
-P EE
K
BG 43
30
30 BG 43
EK
K
PE
PE E
on rb Ca +
M TF
E+
RV
S
e Gl
+ M
PT F
as
sF ibr
e Fib r rb TF
Ca
PT
FE
+
+ FE PT
on
sF ibr e
M
as Gl
FE
TF in Vir g
PC T
FE Vir
gin
PT
FE ET
F PV D
UH MW
PE
-300
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