5
Penberthy
SErIES N6 GaGEcockS
InstallatIon, operatIon and maIntenance InstructIons
6.1 Preventative maintenance
The user must create maintenance schedules,
safety manuals and inspection details for each
specific installation of a gagecock set.
For purposes of maintenance on all
installations, the gagecocks should be
evaluated regularly for signs of:
1. Leakage around stem area.
2. Internal stem leakage.
3. Leakage around stuffing box connection.
4. Internal or external corrosion.
The user must determine an appropriate
maintenance schedule necessary for his or her
specific application upon evaluation of their own
operating experience. realistic maintenance
schedules can only be determined with full
knowledge of the services and application
situations involved.
4. Signs of internal or external corrosion could
be an indication of a misapplication. an
investigation should immediately be carried
out to determine the cause of the problem.
It is the user's responsibility to choose a
material of construction compatible with
both the contained fluid and the surrounding
atmosphere in the specific application.
5. For broken sight glass replacement, follow
Disassembly steps 'a', 'b' and 'g' through
'l' and reassembly steps 'a', 'b' and 'g'
through 'm'.
safety InstruCtIOns
New glass packing must be used when replacing
glass.
6.2 Maintenance procedures
1. Stem packing leakage can often be stopped
by tightening the stem packing nut. If
leakage persists, the stem packing should
be replaced by following steps 'a' through
'f' of Disassembly and 'a' through 'f' of
reassembly instructions.
2. Signs of an internal stem leak is an
indication of a worn or damaged stem or
seat.
a. To replace the stem, follow disassembly
steps a through 'f' and reassembly steps
'a' through 'f'.
b. To renew the seat surface, follow
Disassembly steps 'a' through 'f'. renew
seat by using a fine lapping compound
and a mandrel with the same size,
shape and seat angle as the stem. Flush
gagecock body clean and reassemble
by following steps 'a' through 'f' of
reassembly.
note:
Series N6 gagecocks have an integral
seat. The gagecock body must be replaced
when the seat becomes worn or damaged
beyond repair.
3. Signs of leakage around the stuffing box
indicate worn out glass packing or improper
compression of glass packing. To replace
glass packing, follow Disassembly steps
'a', 'b' and 'g' through 'l' and reassembly
steps 'a', 'b' and 'g' through 'm'. In the event
of improper compression, leakage can be
stopped by tightening the gage coupling nut.
7 reMOVal - dIsasseMbly - reasseMbly
WarnIng
Do not proceed with the disassembly of a gage
unless the gagecock has been relieved of all
pressure or vacuum, has been allowed to reach
ambient temperature, and has been drained
or purged of all fluids. Failure to follow any
instructions could result in severe personal injury
or property damage.
7.1 disassembly
a. close upper and lower gagecocks.
b. open draincock and allow gagecocks to
drain.
c. remove handwheel screw, nameplate and
handwheel or lever from stem.
d. Loosen and remove stem packing nut.
e. remove stem by turning counterclockwise,
along with stem packing and stem packing
retainer.
f. Slip the stem packing and stem packing
retainer off the stem.
g. remove guard rods if present.
h. Loosen glass packing nuts on both upper
and lower gagecocks.
i. Slide sight glass upward into upper
gagecock until bottom of tubular glass
clears the stuffing box connection on the
lower gagecock.
j. While holding the tubular glass in this
upward position, rotate upper gagecock
counterclockwise (approx. ⅛ turn) to allow
clearance to remove sight glass from upper
gagecock.
k. remove sight glass from upper gagecock.
l. remove glass packing nuts, glass packing
glands and glass packing from both the
upper and lower gagecocks.
