INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM)
IOM-PGR-1
01-17
I. DESCRIPTION AND SCOPE
Model PGR-1 is a pressure reducing regulator used to control downstream (outlet or P2) pressure. Sizes are
1/2" (DN15), 3/4" (DN20), 1" (DN25)
,
1-1/2" (DN40), 2" (DN50), 3" (DN80) and 4" (DN100). This model is ap-
plied primarily in gaseous service.
MODEL PGR-1
DIRECT-ACTING, PRESSURE LOADED
PRESSURE REDUCING REGULATOR
II. REFERENCES
Refer to Technical Bulletin PGR-1-TB for tech ni cal
specifications for this reg u la tor.
ABBREVIATIONS
CW –
Clockwise
CCW –
Counter Clockwise
ITA
–
Inner Trim Assembly
III. INSTALLATION
SECTION III
SECTION II
SECTION I
1. Regulator may be rotated around pipe axis
360 degrees. For ease of maintenance, the
rec om mend ed position is with the cover dome
(2) up wards.
2. Provide space below, above, and around
reg u la tor for removal of parts during maintenance.
3. Install block valves and pressure gauges to
pro vide means for adjustment, operation, bypass,
or removal of the regulator. A pipeline strainer
is recommended before inlet to remove typical
pipe line debris from entering valve and damaging
internal “soft goods”, primarily the dynamic seal.
4. The PGR-1 is designed to regulate pressure
via external sensing. Use 3/8" or 1/2" (DN10
or DN15) outer di am e ter tubing to connect the
sensing port on the pilot to the piping down stream
of the main regulator. If PGR-1 is constructed
with self contained feature, tubing and connection
in downstream piping is not required.
CAUTION
Installation of adequate overpressure pro tec tion is
recommended to pro tect the reg u la tor from overpressure
and all down stream equip ment from damage in the event
of regulator failure.
Model PGR-1
ISO Registered Company
