9
Anderson Greenwood
SerieS 95 Pilot oPerated Safety relief ValVeS
InstallatIon and MaIntenance InstructIons
6 pilot set pressure field test
procedure
Refer to Figure 6
this procedure is for measuring the pressure
where the valve will open. it will not measure
where the valve closes. to measure the closing
pressure, use the procedure in Section 5.
6.1 remove the pilot discharge tube from the
pilot and replace with a cap that has a
.06” diameter (1.5 mm) hole in it.
6.2 Connect the test equipment to the field test
valve.
6.3 With the metering and vent valve closed,
open the gas bottle and adjust the regulator
pressure to about 200 psi (14 kp/cm
2
).
6.4 open the field test valve. Slowly open the
metering valve and observe the test gauge.
increase the pressure until gas flow at the
pilot discharge fitting increases rapidly.
the pressure at which this occurs is the set
pressure of the valve.
fiGure 6
adapter fitting to ½” NPt port
on field test valve
Primary set pressure
adjustment under cap
Nitrogen
bottle with
shutoff valve
and regulator
Bonnet vent
field test
valve
test gauge
Metering valve
auxiliary set pressure
adjustment under cap
High
pressure
hose
Vent valve
unscrew here for removal
(install hand-tight only -
lubricate threads)
Pilot discharge fitting
auxiliary setter
Pilot discharge tube
Main valve
series 95 pilot recommended field test
set-up
6.5 to adjust the opening pressure turn
the spring adjusting screw under the
cap/adapter “in” to increase pressure or
“out” to decrease pressure.
6.6 the iMo (international Maritime organization)
rule set pressure tolerances are:
+ 10% 0 - 21.3 psi (0 - 1.5 kp/cm
2
)
+ 6%
21.3 - 42.7 psi (1.5 - 3.0 kp/cm
2
)
+ 3%
42.7 psi or 3.0 kp/cm
2
and above
Pilot
