Type BM9
8
Before Installation:
• Unpack the slam-shut valve and remove
the protective shipping covers from the end
connections of the body.
• Check the slam-shut valve and make sure it has
not been damaged or collected foreign material
during shipping.
• Remove any debris or dirt in the tubing and
the pipeline.
• Use suitable line gaskets and approved piping and
bolting practices.
• Make sure gas flow through the slam-shut valve is
in the same direction as the arrow on the body.
• Under enclosed conditions or indoors, escaping
gas may accumulate and be an explosion hazard.
In this case, the vent should be piped outdoors.
• For slam-shut valve and accessories with vents,
the vent should be kept open to permit free flow of
gas to the atmosphere. Protect openings against
entrance of rain, snow, insects or any other foreign
material that may plug the spring case vent or
vent line.
Connect a downstream control line to a straight run
of pipe 4 to 5 pipe diameters from the regulator outlet
as shown in Figures 5 and 6. If such a distance is not
practical, connect the control line away from elbows,
swages, nipples or any area where abnormal flow
velocities occur. See Figures 5 and 6.
Pilot-Loaded Controllers
▲
WARNING
A pilot may vent some gas to
the atmosphere. In hazardous or
flammable gas service, vented gas may
accumulate, causing personal injury,
death or property damage due to fire
or explosion. Install vent line(s) from
the pilot(s) to a remote, safe location
away from air intakes or any hazardous
location. The end of the vent line or
stack opening must be pointed down
and protected against condensation
or clogging.
△
CAUTION
To avoid freeze-up because of pressure
drop and moisture in the gas, use
anti-freeze practices, such as heating
the supply gas or adding a de-icing
agent to the supply gas.
Type BM9 slam-shut valve bleeds no gas to
atmosphere during normal operation, thus making
it suitable for installation in enclosed locations
without elaborate venting system, if the bleed lines
are connected to the downstream pipeline. Further,
the pilot spring case vent shall be referenced to
atmospheric pressure so that the pilot can be set.
The PRX pilots have a 1/4 NPT vent connection at the
spring case and at the side of the body respectively.
To remotely vent the pilots:
1. Remove the screened vent and install obstruction-
free tubing or piping into the 1/4 NPT vent tapping.
2. Install a screened vent cap onto the remote
end of the vent pipe to provide protection on a
remote vent.
Note
The piping or tubing should vent to a
safe location, have as few elbows as
possible and have a screened vent on
its exhaust.
3. Install the pilot and any remote vent piping
or tubing so that the vent is protected from
condensation, freezing or any substance that
could clog it.
4. Install a full flow hand valve, such as a full port ball
valve, in the control line.
MAXIMUM LIFTING ANGLE IS 45°
RECOMMENDED
EYEBOLT ORIENTATION
AVOID THIS
EYEBOLT ORIENTATION
Figure 7.
Lifting Lugs: Illustration of Lateral Loading
