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Design and principle of operation
Table 3-2: Possible wafer‑type versions for Type 3381‑1R as well as for combinations of
Type 3381‑1 and Type 3381‑1R
Note:
− Wafer-type version only for standard materials according to Table 3-1
− Only nominal sizes possible according to the standard and depending on the pressure
rating
DIN EN versions
Nominal size
DN 200
DN 250
DN 300
DN 350
DN 450
DN 600 and larger
3-4
Pressure rating (min.)
PN 400 and higher
PN 250 and higher
PN 100 and higher
PN 63 and higher
PN 40 and higher
All pressure ratings
ANSI versions
Nominal size
NPS 8
NPS 10
NPS 12
–
NPS 16 and larger
–
Pressure rating (min.)
Class 2500 and higher
Class 1500 and higher
Class 600 and higher
–
All pressure ratings
–
EB 8084 EN
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