36
GOVERNORS NOR
TH AMERICA
US
LOW PRESSURE GAS REGULATOR
|
DESCRIPTION AND OPERATION
|
REV. A
Operation, maintenance and warning manual
4.3.1 - OPD VERSION OPERATION
During normal operation, the monitor regulator (A) does not make any adjustments.
If the regulating regulator (B) fails, the monitor regulator (A), through the external pressure tap (C), regulates at a safety
pressure normally 70% higher than the regulator pressure (B). The action of the monitor regulator (A) keeps the operating
set point below the CSA limit of 2 PSIG.
In the event of failure of the regulating regulator (B), the monitor regulator (A) should limit the downstream
outlet pressure without undergoing set point changes.
A
B
C
U
pstream
(
inlet
)
pressUre
D
ownstream
(
oUtlet
)
pressUre
Fig. 4.6. OPD version operation
Summary of Contents for 30051
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