XX. Setting and Testing (Cont.)
F. Field Testing of POSRV Assembly
IMPORTANT - Read First:
A.
These procedures shall not be used unless
in the presence of a qualified Consolidated
technician
B.
These procedures are specialized and
shall not be incorporated into any of the
customer’s SOP’s
C.
In no case shall the auxiliary pressure be
raised more than 115% of MAWP.
i.
The auxiliary system providing pressure
must contain proper control to regulate
flow into pilot.
D.
The necessary tubing, gauges, and fittings
to perform this test must have a minimum
pressure rating of 2x the maximum desired
set point.
E.
In the cases when the auxiliary pressure is
higher than the set pressure of the valve,
these procedures may interfere with normal
valve operation and the valve may not
perform its intended function. The process
system pressure shall be monitored at all
times during the performance of these tests.
If system pressure increases past 95% of
desired set pressure, the auxiliary pressure
source shall be removed and the vent valve
downstream of the exhaust gauge shall be
opened. This will allow the PRV to function
as intended.
F.
In cases where there is a large pressure
gap between the bottle/source pressure and
desired dome pressure, it is recommended
multiple regulators be installed to maintain
the ability to fine tune the pressure setting in
the pilot dome.
F.1 Field Test Connection
A 1/4” FNPT field test connection (Figure 70) is
standard on all Consolidated pilot valve types, 39PV
series and 39MV series. The field test connection
along with an auxiliary pressure source can used
to provide a stable and constant pressure to the
pilot valve and dome of the main valve. An internal
check valve is present in the field test connection
isolating the inlet media from the auxiliary pressure
source media and at the same time, allowing the
valve to open normally in the event of a system over
pressurization while using the field test connection.
Figures 69 and 71 represent the recommended
schematic for supplying auxiliary pressure to the
POSRV. The “Connection to Valve Test Plug” mates
with the 1/4” FNPT of the Field Test Connection.
Below are some common usages for the field test
connection:
Figure 69: Typical Field Test Arrangement
Consolidated 2900 Series Generation II POSRV Instruction Manual
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