Type BM9
14
adjustment and unsafe operation. Either
condition may result in equipment
damage or personal injury. Call qualified
personnel when installing, operating
and maintaining the unit.
△
CAUTION
Eyebolts are installed to aid in the
handling and installation of the
slam-shut valve assembly only. Do not
attempt to lift more weight than the
slam-shut valve with these eyebolts.
Do not use another type of eyebolt,
slam-shut controller or pilot on this
slam-shut valve. Only Emerson parts
can be used to maintain the unit.
See Table 6 for troubleshooting and corrective action
for Type BM9.
Disk Ring Maintenance (See Figure 14)
▲
WARNING
When removing disk holder, ensure
to handle with care to avoid dropping
which may result in equipment damage
or personal injury.
△
CAUTION
Before removing line bolting connecting
the pipeline and body, ensure adequate
support is provided to prevent body
and/or spacer from dropping and
damaging and/or deforming the piping
and accessories.
1. Remove all piping bolts connecting to pipeline and
body inlet flange.
2. Take out spacer (key 17).
3. Screw in two bolts or screws into two threaded
holes on disk holder (key 18). Bolt dimensions
are M12 for DN 300 / NPS 12, M10 for DN 250 /
NPS 10 and M8 for DN 200 / NPS 8. Apply torque
counterclockwise on both bolts to slowly back out
the disk holder (key 18). Use a crowbar or wrench
for ease of rotating.
Note
The bolts could be substituted with
studs, screws or eyebolts. The
recommended length should not exceed
80 mm / 3.15 in. The strength of the
bolt should be equal to or greater than
that of class 8.8 material. The thread
engagement between bolt and threaded
hole on disk holder should be at least
10 mm / 0.4 in.
4. When the disk holder (key 18) is completely
unscrewed as shown in Figure 10 (a), remove the
bolt from the disk holder (to avoid damaging the
pipe flange) and then remove the disk holder from
the valve body as shown in Figure 10 (b).
Seat ring (key 47) will be taken out along with the
disk holder.
Note
When maintaining Type BM9 online, if the
seat ring (key 47) is not taken out along
with the disk holder (key 18), please slowly
reset about 60° and slowly closed. Then
the Seat Ring (key 47) can be pushed out.
In the process of resetting, do not put
hands near the inlet to avoid injury.
5. For DN 300 / NPS 12, unscrew the six screws
(key 49) from seal ring retainer (key 46),
disassemble disk holder (key 18) and seal ring
retainer (key 46), and replace the old disk (key 47)
and O-ring (key 42).
For DN 200 and 250 / NPS 8 and 10, separate the
disk (key 47) and O-ring (key 42) from disk holder
(key 18), and replace them.
6. Reinstall the seal ring retainer (key 46) to disk
holder (key 18) in reverse order.
7. Reinstall the disk holder (key 18) and seal ring
retainer (key 46) subassembly into the body
(key 1). Apply anti-seize lubricant on the disk
holder and body threads to lubricate. Screw in
disk holder clockwise on body (key 1) until the
top surface of disk holder is perfectly aligned with
mating surface of body. Ensure that the surface
of the disk holder is not projecting outside of body
flange surface.
General Maintenance
(See Figures 14, 15 and 16)
△
CAUTION
Protect gasket surfaces on the body
flanges and spacer from scratches
and damage.
Make sure the larger ring of thrust
ball bearing (key 53) connects with
cam (key 55) for size DN 300 / NPS 12,
otherwise more resistance may hinder
