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TyPE NUMBER
S
2
0
REGULATOR TyPE
1
Regulator, 2 to 30-inches w.c. (5 to 75 mbar) outlet range
2
Regulator, 2 to 30-inches w.c. (5 to 75 mbar) outlet range with Internal Relief
PRESSURE OUTLET RANGE
H
High-Pressure Regulator, 1 to 5 psi (0,07 to 0,34 bar) outlet range with heavy diaphragm plate
K
High-Pressure Regulator with external adjusting screw, 2 to 10 psi (0,14 to 0,69 bar) outlet range (Not an option for S202)
Installation
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
Specifications section and 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 from
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.
S201 and S202 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
Figure 3. Available Configurations
CAUTION
S201 and S202 Series
OPTIONS
PROTECT vENT PIPE
WITh RAIN CAP
TyPE S201
REGULATOR
AJ4698
A1121
Figure 4. Type S201 Regulator Installed with the Vent
Pointed Downward and with a Type 289H Relief Valve for
High Capacity Relief
any portion of the regulators beyond the
limits in the Specifications section and
Table 1 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 specified in the
Specifications section and Table 1 does
not preclude the possibility of damage
from external sources or from debris in
the pipeline.
NPS 2 (DN 50)
TyPE 289h
RELIEF vALvE
3
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