CSB700 Series
6
Downstream Control Line Installation
!
WARNING
Failure to install a downstream control line
could result in a hazardous condition. Install
downstream control line(s) to the slam-shut
device when construction uses external
pressure registration. The regulator and
slam-shut device will not control pressure
or shut off if a downstream control line is
not installed on those constructions where
external pressure registration is required.
CSB700 Series regulators with an “ET” or “EN” in the type
number use external pressure registration. To communicate
the downstream pressure to the regulator, connect a
downstream control line tubing to the 3/4 NPT control line
tapping in the lower diaphragm casing and connect the other
end of the tubing downstream of the regulator outlet with a
minimum distance of 6 times the outlet pipe diameter.
For all types with external control lines, use tubing with an
inner diameter of 16 mm / 0.63 in. or larger.
Downstream Control Line Installation with
Slam-Shut Device
Refer to Figure 1. When installing the Types CSB704ET,
CSB704FET, CSB704FEN CSB704EN, CSB724ET,
CSB724EN, CSB724FEN and CSB754EN regulators,
connect downstream control line tubing to the lower casing
of the regulator and run the tubing downstream of the
regulator outlet with a minimum distance of 6 times the outlet
pipe diameter. Connect a second, separate downstream
control line tubing to the lower casing of the slam-shut and
run the tubing downstream of the regulator outlet a minimum
distance of 6 times the outlet pipe diameter.
For all types with external control lines, use tubing with an
inner diameter of 16 mm / 0.63 in. or larger for the primary
regulator and 6.4 mm / 0.25 in. or larger for the slam-shut.
Installation with External Overpressure Protection
If the regulator is used in conjunction with a Type 289H
relief valve, it should be installed as shown in Figure 6.
The outside end of the vent line should be protected
with a rainproof assembly. The Type 289H is typically
set 25 mbar / 10 in. w.c. higher than the outlet pressure
setting of the regulator, up to 75 mbar / 30 in. w.c. outlet
pressure. For pressure greater than this, set the Type 289H
0.05 bar / 0.73 psi higher than the outlet pressure setting
of the regulator. Refer to the 289 Series Instruction Manual
(D100280X012) for more information.
Installation
!
WARNING
Only qualified personnel shall install or
service a regulator. Regulators should
be installed, operated and maintained
in accordance with international and
applicable codes and regulations and
Emerson instructions.
If the regulator vents fluid or a leak develops
in the system, it indicates that service
is required. Failure to take the regulator
out of service immediately may create a
hazardous condition.
Personal injury, equipment damage or
leakage due to escaping gas or bursting of
pressure containing parts may result if this
regulator is overpressured or is installed
where service conditions could exceed the
limits given in the Specifications section or
where conditions exceed any ratings of the
adjacent piping or piping connections.
To avoid such injury or damage, provide
pressure-relieving or pressure-limiting
devices (as required by the appropriate code,
regulation or standard) to prevent service
conditions from exceeding limits.
Additionally, physical damage to the
regulator could result in personal injury and
property damage due to escaping fluid. To
avoid such injury and damage, install the
regulator in a safe location.
Clean out all pipelines before installation of the regulator
and check to be sure the regulator has not been damaged
or has collected foreign material during shipping. For NPT
bodies, apply pipe compound to the external pipe threads.
For flanged bodies, use suitable line gaskets and approved
piping and bolting practices. Install the regulator in any
position desired, unless otherwise specified, but be sure flow
through the body is in the direction indicated by the arrow on
the body.
Note
It is important that the regulator be installed
so that the vent hole in the spring case
is unobstructed at all times. For outdoor
installations, the regulator should be located
away from vehicular traffic and positioned
so that water, ice and other foreign materials
cannot enter the spring case through the
vent. Avoid placing the regulator beneath
eaves or downspouts and be sure it is above
the probable snow level.
