4
Figure 2
1
2
3
5
This is the maximum inlet the regulator should operate at to insure complete lockup
at no-flow conditions.
Maximum Recommended Inlet Pressure
increase outlet pressure; counterclockwise to decrease
outlet pressure.
Establish the outlet pressure within the range limits of
g.
the pressure spring used.
To test for the regulator's ability to fully shut off (lock-up),
h.
shut off all flow downstream of the regulator. At lock-up,
the outlet pressure will be somewhat higher than the set
pressure. However, if the pressure continues to rise after
3 seconds, the regulator must be repaired. Observe for
30 seconds.
When the set pressure is properly adjusted,
i.
depressurize and remove gauge(s) and lines.
Replace seal plug (4).
j.
Pressurize and check all connections for leaks.
k.
(Numbers in parentheses refer to Figure 2.)
Remove all shipping plugs from the valve body.
1.
Use good piping practice. Be sure piping and regulator are
2.
free of dirt, pipe dope and other debris. Apply pipe dope to
male threads only.
Install regulator. Make certain it is installed correctly with
3.
inlet pipe connected to the inlet regulator connection and
flow is in the direction as indicated by arrow located on
valve body (1). Elster American Meter suggests the vent
point downward to prevent entry of water and debris. By
removing the two valve body bolts (2), the diaphragm case
(3) may be rotated in 90-degree increments in relation to the
valve body (1). Replace and tighten the two valve body bolts
(2) to 100 ±25 in. lbs. A regulator installed within a building
should be located as near as practical to the point of service
line entrance.
Make sure inlet pressure is always less than the maximum
4.
recommended inlet pressure for the orifice size (see Table
3). Turn gas on slowly. If an outlet valve is used, it should be
opened first. Do not subject the regulator to a sudden surge
of inlet pressure.
Assure that there are no leaks and all connections are tight.
5.
The SR100 Series regulator is preset at the factory. Should
6.
you decide to adjust the set pressure, perform the following:
Turn gas off and depressurize the system.
a.
Install outlet pressure gauge.
b.
Turn gas on slowly.
c.
Establish a low flow rate between 45 and 55 SCFH.
d.
Remove seal plug (4) with a 1" wrench.
e.
Turn pressure spring adjustment screw (5) clockwise to
f.
Inside Installation: A vent line of sufficient
diameter to carry gas vented by the regulator to
a safe outside location away from any opening in
the building is required. For all sizes of regulators,
a 3/4" or 1" threaded vent is provided for a vent
line. Verify vent piping does not interfere with the
vent flapper movement.
Outside Installation: Care must be taken to prevent
vent opening from freezing closed, becoming
blocked, or allowing water to enter from any
cause. Particular consideration should be given to
sites where flooding, snow, or freezing rain may
be experienced. The vent or vent line port should
point vertically downward, and overhead protection
should be used where necessary.
Installation
!
WARNING
SR100 Series Service Regulators
04 Elster American Meter
Table 3
Orifice Size
Inlet Pressure (PSIG)
1/8" x 3/16"
125
3/16"
125
1/4"
125
5/16"
100