133 Series
4
Installation
Before installing the 133 Series regulators, inspect it
for shipping damage and be certain that the body and
orifice are clean. Blow out the pipeline to remove pipe
scale and other foreign material.
The regulator may be installed in any position as long
as the flow through the body is the same as indicated
by the flow direction arrow on the body and the vent
opening is unobstructed and protected from the
entrance of rain, ice and other foreign material.
If the regulator has threaded end connections, coat
male threads with pipe compound. For flanged
end connections, tighten the flange bolts evenly.
Install a three valve bypass around the 133 Series if
continuous operation is necessary.
The regulator must be protected from damage by
vehicles and other outside sources.
Overpressure Protection
The 133 Series regulators, as is the case with most
regulators, has an outlet pressure rating that is
lower than the inlet pressure rating. Some type of
Figure 3.
Operational Schematic of Type 133HP
overpressure protection is needed if the actual inlet
pressure exceeds the outlet pressure rating.
Maximum operating inlet pressure for the 133 Series
regulators is given in Table 2. All models must
be protected against inlet pressure above their
listed maximum.
Regulator operation below these emergency pressure
limitations does not preclude the possibility of damage
from external sources or from debris in the gas line.
The regulator should be inspected for damage after
any overpressure condition.
Downstream Control Line
An external downstream control line must be installed
before putting the 133 Series regulators in operation.
Without the control line, the regulator will remain wide-
open. The downstream control line should be a pipe of
at least 1/2-inch (12,7 mm) diameter; connect it to the
downstream pipe line at least 5 to 10 pipe diameters
from the regulator and in a straight section of pipe.
The external downstream control line connection on
the Type 133HP is 1/4-inch threaded NPT.
Vent
The 133 Series vent is screened to prevent insects
or foreign material from entering. On indoor
installations, if a vent to atmosphere is required,
remove the snap ring and screen (keys 8J and 8H;
Figure 10, 11, or 12) from the Types 133H, 133L, and
133Z. Remove the Type Y602-7 screened vent and
pipe nipple (keys 50 and 49; Figure 14) from
the spring case (key 8) and pipe the vent to the
outside. The Types 133H, 133L, and 133Z have
a 1-inch NPT (internal) connection and the Type 133HP
has a 1/2-inch NPT (internal) construction.
The vent pipe should be as short as possible with
a minimum of bends and elbows. The pipe should
also have as large a diameter as possible. Install
a weather and bug resistant vent assembly on the
outside end of the vent pipe.
For indoor installation that have been piped to the
outside and for outdoor installations, the vent opening
must be positioned so that water, ice and other foreign
material cannot enter the spring case. Use care not to
place the vent opening below downspouts and eaves.
The vent opening should be checked periodically to
see that the opening has not been plugged by foreign
material. On some installations it may be necessary to
provide additional protection from the elements.
Type 133HP
A6883
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
Type 133HP
A6883
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
A6883
InLET PRESSURE
OUTLET PRESSURE
aTMOSPHERIC PRESSURE
