Cameron ORBIT GP-6, Установка, эксплуатация и обслуживание

Страница: 17 / 24

15
1
All ORBIT valves except
O.S.&Y. bonnet design
utilize a hydraulic type
stem packing chamber.
Stopping stem leaks
promptly reduces damage
to the packing and the
valve.
Do not
remove packing fitting.
Personal injury and/or
damage to property may
result.
WARNING!
2
Stem leaks are most
frequently associated with
start ups or other operating
changes, but some may
develop during steady
operation or after long use.
3
To stop stem leaks,
advance or tighten the
packing adjustment screw.
This forces the plastic
packing past the ball check
into the packing chamber.
4
As the plastic packing
is forced into the packing
chamber it increases the
pressure and reactivates the
Chevron type packing rings.
Usually 5 to 10 turns on the
adjustment screw will stop
the stem leak.
5
Should the plastic
packing become depleted,
it can be replaced by
removing the packing
adjustment screw.
(This should be done slowly
and carefully to be sure the
ball check has sealed off the
packing chamber pressure.)
and replacing it with the
type of plastic packing that
is shown on the nameplate.
Do not substitute without...
6
...consulting the chart
on page 17.
Replace the adjustment
screw and advance it to stop
the leak but do not exceed a
50 lb. pull on a 6 in. wrench
(20 kg pull on a 150 mm
wrench). A sufficient number
of threads in the packing
chamber must be left
exposed to allow
engagement of the packing
screw threads.
7
DO NOT OVER PACK!
Over packing can result in
stiff handwheel operation
or can build up excessive
pressure in the stem
packing chamber, causing
forceful expulsion of the
entire packing fitting.
To prevent over packing
when the valve is in service,
do not exceed a 50 lb. pull
on a 6 in. wrench (20 kgs
pull on a 150 mm wrench).
8
If the valve is not in
service, partially open the
valve and advance the
adjustment screw until the
handwheel will not coast
(freewheel) after being spun.
Do not exceed a 50 lb. pull
on a 6 in. wrench (20 kg pull
on a 150 mm wrench).
(CONTINUED ON NEXT PAGE)
P R O C E S S V A L V E S
INSTALLATION, OPERATION AND MAINTENANCE
STEM PACKING ADJUSTMENT
CT-ORB-IOM/6
05/08 ION-3M
®
ORBIT