TP50-160/2 Shaft Seals Manual

47
Pumped liquids
Shaft seals
Acids, continued
Legend
++ = Best solution
+ = Suitable
± = Suitable under certain conditions
– = Not suitable
Liquid
Shaft seal (EN 12756)
Rotating face:
Stationary seat:
Secondary seal:
Spring:
Other parts:
Q
Q
E
G
G
Q
Q
V
G
G
B
Q
E
G
G
B
Q
V
G
G
B
V
E
G
G
B
V
V
G
G
U
U
E
G
G
U
U
V
G
G
B
U
E
G
G
B
U
V
G
G
Salicylic acid
C
6
H
4
(OH)COOH
Max. temp. [°C] 80 80 80 80 80 80 80 80
Max. conc. [%] 5555 5555
Suitability +++++––++++
Comments Shaft seal with flush may be a good choice due to low solubility.
Sulphamic acid
NH
2
SO
3
H
Max. temp. [°C] 20 20
Max. conc. [%] 5 5
Suitability – ++ – + – – – – – –
Comments
Sulphuric acid
H
2
SO
4
Max. temp. [°C] 20 20 20 20
Max. conc. [%] 5555
Suitability ++++––––––
Comments
Sulphurous acid
H
2
SO
3
Max. temp. [°C] 60 60 20 20
Max. conc. [%] 6 6 2 2
Suitability + – + – – – ± – ± –
Comments