All Installations - Emerson Tartarini FL Series Instruction Manual

Type FL
additionally, physical damage to the
regulator could break the pilot off the
main valve, causing personal injury
and property damage due to bursting
of pressure-containing parts. To avoid
such injury and damage, install the
regulator in a safe location.

all installations

A Type FL regulator bleeds no gas to atmosphere
during normal operation, making it suitable for
installation in pits and other enclosed locations
without elaborate venting systems. This regulator
also can be installed in pits subject to flooding by
venting the pilot spring case above the expected
flood level so that the pilot diaphragm is exposed to
atmospheric pressure.
1. Only personnel qualified through training and
experience should install, operate and maintain a
regulator. Before installation, make sure that there
is no damage to or debris in the regulator. Also,
make sure that all tubing and piping are clean
and unobstructed.
2. Install the regulator so that the flow arrow on the
main valve matches the flow direction of process
fluid through the regulator. The Type FL may be
installed in any position, but it is normally installed
in a horizontal pipeline with the pilot or pilots
above the body.
3. Apply pipe compound to the external pipeline
threads before installing a regulator with threaded
NPT end connections. Use gaskets between
pipeline and regulator flanges when installing a
regulator with flanged end connections. When
installing butt weld end connections, remove
trim before welding and make sure to use
approved welding practices. Use approved piping
procedures when installing the regulator.
4. The optimal location of the sense and bleed lines
is between the Type FL and the Downstream block
valve. The tap location should be in a straight
section of pipe that is 8 to 10 pipe diameters
downstream of the outlet flange. These guidelines
are not mandatory but have been used to improve
stability at low flow conditions in some systems.
CaUTiOn
To prevent damage to the pilot during
Startup, the sense and bleed lines
should be located on the same side of
the downstream block valve.
8
5. Connect inlet supply pressure to the Type SA/2
1/4 NPT inlet, Port M.
WaRning
!
a regulator 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 bursting of
pressure-retaining parts. Vent a regulator
in hazardous gas service to a remote,
safe location away from air intakes or
any hazardous location. The vent line or
stack opening must be protected against
condensation or clogging.
6. PRX Series pilots have a 1/4 NPT vent connection
in the spring case. To remotely vent gas from the
spring case, remove the screened vent and connect
1/4 in. / 6.4 mm piping or tubing to the spring case
connection. The piping or tubing should vent to a safe
location, have as few elbows as possible and have a
screened vent on its exhaust. Install the regulator and
any remote vent piping or tubing so that the vent is
protected from condensation, freezing or substances
that may clog it.
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.
7. The PRX Series pilot connections are 1/4 NPT.
Connect a downstream control (sense) line to a
straight run of pipe 6 to 10 pipe diameters from the
regulator outlet as shown in Figure 3, using
3/8 in. / 9.5 mm or larger outside diameter tubing.
If such a distance is not practical, connect the
control line away from elbows, swages, nipples
or any area where abnormal flow velocities occur.
Connect the other end of the control line to the "A"
port on the bottom of the PRX Series pilot.
note
The optimal location for the sense and
bleed lines is between the regulator and
the downstream block valve. To prevent
damage to the pilot during startup, the
sense and bleed lines should be located
on the same side of the downstream
block valve.