E N G I N E E R E D & P R O C E S S V A L V E S
6
07/2011 / IOM-GEN-TWIN-03
Installation, Operation and Maintenance Manual
INTEGRAL BUSHING/RETAINING RING GLAND
INTEGRAL BUSHING/BOLTED GLAND
Typical Arrangement of:
2”
C811
2”
C821
3”
CA811
3”
CA821
The smallest of the Twin Seal valves
do not require discrete bushings
due to minimal hydro seating forces
within the valve. Also note that due
to the size of the operator, the gland
is held in by a retaining ring backed
up by the operator housing.
Typical Arrangement of:
4”
C811
The units do not require discrete
bushings due to small hydro
seating forces and by incorporating
a slightly larger operator a bolt gland
can be employed.
