Fig.8:
Soft-sealing seat version (VARIVENT®
principle with V-ring)
Fig.9:
Metallic seat version
The
soft-sealing seat version
is subject to
leakage class VI
. This results in the
following exemplary permissible seat leakages for 5 barg (test medium air).
KVS (m3/h)
4
6.3
10
16
25
35
40
60
80
100
160
200
260
360
Permissible leakage
(air in ml/min)
0.23
0.23
0.23
0.32
0.45
0.68
0.68
0.90
1.35
2.55
2.55
3.24
4.62
6.00
The
metallic seat version
is subject to
leakage class IV
(test procedure 2). This
results in the following exemplary permissible seat leakages for 5 barg (test
medium air).
KVS (m3/h)
4
6.3
10
16
25
35
40
60
80
100
160
200
260
360
Permissible leakage
(water in ml/min)
20
20
40
60
90
130
150
220
300
370
590
730
950
1320
5.4
Resistance of Sealing Materials
The resistance of sealing materials depends on the type and temperature of the
medium conveyed. The exposure time can adversely affect the service life of the
seals. The sealing materials comply with the regulations of FDA 21 CFR
177.2600 or FDA 21 CFR 177.1550.
Resistance:
•
+ = good resistance
•
o = reduced resistance
•
- = no resistance
Technical data
Resistance of Sealing Materials
430BAL011074EN_5
24
08.11.2021
