CS200 Series
6
Secondary Seat Protection does not provide additional
overpressure protection in the event the secondary seat
or disk is damaged by debris or contamination in the
pipeline, or from conditions that would cause the regulator
to go wide-open. When selecting Secondary Seat
Protection, it is recommended that:
• Internal Relief is also selected, or the addition of
some other method of overpressure protection be
added in the downstream system as discussed in the
Overpressure Protection section; and
• A periodic downstream lock-up pressure test is done
to determine if the Secondary Seat Protection option
is serving as the primary seat for shutoff, thereby
indicating that the primary orifice/seat or the disk
are no longer providing shutoff. This determination
is made by checking if the regulator lock-up value is
elevated to or near the values indicated in Table 5,
under the heading Type CS205
Installation and
Overpressure Protection
!
WARNING
Personal injury or system damage may
result if this regulator is installed, without
appropriate overpressure protection,
where service conditions could exceed the
limits given on the regulator nameplate.
Regulator installations should
be adequately protected from
physical damage.
All vents 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 vent or vent line. On
outdoor installations, point the spring case
vent downward to allow condensate to
drain (see
Figure 4). This minimizes the
possibility of freezing and of water or other
foreign materials entering the vent and
interfering with proper operation.
Under enclosed conditions or indoors,
escaping gas may accumulate and be an
explosion hazard. In these cases, the vent
should be piped away from the regulator to
the outdoors.
CAUTION
The CS200 Series regulators have an
outlet pressure rating lower than their
inlet pressure rating. If actual inlet
pressure can exceed the outlet pressure
rating, outlet overpressure protection is
necessary. However, overpressuring any
portion of the regulators beyond the limits
in the Specifications section may cause
leakage, damage to regulator parts, or
personal injury due to bursting of pressure-
containing parts.
Some type of external overpressure
protection should be provided if inlet
pressure will be high enough to damage
downstream equipment. Common methods
of external overpressure protection include
relief valves, monitoring regulators, shutoff
devices, and series regulation.
If the regulator is exposed to an
overpressure condition, it should be
inspected for any damage that may
have occurred. Regulator operation
below these limits does not preclude
the possibility of damage from external
sources or from debris in the pipeline.
Table 5.
Secondary Seat
TM
Outlet Pressures
CONTROL SPRING
SPRING RANGE
SETPOINT
TYPE CS205
TYPE CS206
Secondary Seat
Shut-off
above Setpoint
(1)(2)
Downstream Pressure
Build-up
Color
Part Number
Inch w.c.
mbar
Inch w.c.
mbar
Inch w.c.
mbar
Inch w.c.
mbar
Gold
GE30188X012
6 to 8
15 to 20
7
17
5
12
25.1
62
Blue
GE30189X012
7.5 to 11
19 to 27
11
27
5.5
14
29.6
74
Unpainted
GE30224X012
10 to 14
25 to 35
14
35
5.8
14
1.26 psig
87
Orange
GE30225X012
18 to 1 psig
45 to 69
1 psig
69
7.8
19
1.90 psig
131
Black
GE30190X012
1 to 2 psig
69 to 138
2 psig
138
13
32
3.42 psig
236
1. Shutoff with primary orifice / seating surface disabled.
2. Shutoff and build-up per ANSI B109.4 at 125 psig / 8.6 bar inlet pressure.
