E N G I N E E R E D & P R O C E S S V A L V E S
07/2011 / IOM-GEN-TWIN-03
7
Installation, Operation and Maintenance Manual
BUSHINGS/ONE GLAND
BUSHINGS/TWO GLAND
Typical
Arrangement of:
3”
C851
3”
C861
4”
C851
6”
C851
Higher pressure class
valves employ the
balanced plug design
to minimize plug
hydro forces which in
turn requires
two glands.
Typical Arrangement of:
2”
C841
6”
C911
12”
C811
2”
C851
6”
C921
12”
C821
2”
C861
6”
C941
12”
A1911
2”
C911
8”
C411
12”
C921
2”
C921
8”
C421
14”
C811
2”
C941
8”
C811
14”
C821
3”
C841
8”
C821
14”
C911
3”
C911
8”
C841
16”
C411
4”
C821
8”
C911
16”
C811
4”
C841
8”
C921
16”
C821
4”
C911
10” C411
16”
C911/21
4”
C921
10” C421
18”
C411
4”
C941
10” CA811
18”
C811
6”
C411
10” C821
20”
C411
6”
C421
10” C911
20”
C421
6”
C821
10” C921
20”
CA811
6”
C841
12” C411
24”
C411
6”
CA811
12” C421
24”
C421
