7
Figure 11. Rear View of Three Clamp Ring Pins
2.2 Opening Procedures
WARNING: Do not open closure while vessel
is under pressure.
Bleed all pressure from vessel
before opening pressure warning
lock. Pressure gauge on vessel
must read zero (0) psig. If
product vents or sprays from
pressure warning lock, vessel is
still pressurized. When all
internal pressure is relieved,
open pressure warning lock and
open closure.
When opening pressure warning
lock, clamp ring, and door,
always stand on the side of the
closure that is opposite the door
hinge. Do not stand in front of
closure or on door hinge side of
closure (or above it in a vertical
installation) while opening.
Spraying line fluids or sudden
door opening may result in
personal injury or property
damage.
A. Isolate the vessel from line pressure, bleed
pressure to 0 psig, and drain.
B. Open the pressure warning lock by turning
the screw counterclockwise. See Figure 12.
Figure 12. Open Pressure Warning Lock
C. Once the pressure warning lock is completely
unthreaded, remove the screw and open the
clamp ring by lifting the clamp ring handle
(Figure 13). This will spread the two clamp
ring pieces so the closure door can be opened
(Figure 14).
Figure 13. Lift Clamp Ring Handle
to Spread Clamp Ring
