XX. Setting and Testing (Contd.)
Figure 57: 39MV72
Figure 56: 39MV22
Figure 55: 39MV07
B.2 39MV07, 39MV22 AND 39MV72
1. Attach Pilot to Main Valve using two Socket Head
Cap Screws (Bracket).
2. Install the tubes into the fittings for the inlet and
dome ports. Make sure the tube ends are fully
inserted before torquing. Begin torquing the fitting,
about midway down, verify that Swagelok Gap
Inspection Gauge (Swagelok P/N MS-IG-468) will go.
Continue to torque down fitting until Swagelok Gap
Inspection Gauge will not go. After torquing, remove
to assure the ferrule is in good contact
with the tubing. Reinstall the tubing.
3. Install tubing to connect the vent port of the
Pilot to the outlet of the Main Valve in the standard
configuration.
4. Final standard configuration for the modulation
pilot valves without any options is shown in
Figures 55 through 57.
C. With Sensing Ring Option
(Figure 58)
Remote sensing is the standard pressure connection
to the pilot valve used on the 2900 Pilot Operated
Safety Relief Valve. However with the Sensing Ring
Option, the pilot valve pressure can be picked up just
before the inlet of the main valve.
The gaskets which are supplied by the customer are
to be inserted between the Valve Nozzle and the
Sensing Ring and between the Sensing Ring and the
test system flange.
Reasons for failure:
1. Any leakage from Pilot at 4% below valve set
pressure or 2 psig (0.14 psig), whichever is greater.
The 39MV22 and 39MV72 may have 50 bubbles per
minute at 5% below the set pressures at or above
2251 psig (155.2 barg) and none at pressures below
2250 psig (155.1 barg).
2. Main Valve equipped with soft seats.
a. For Main Valve equipped with 39MV22 and
39MV72, no leakage (0 bpm) is acceptable at
5% below valve set pressure or 2 psig (0.14
barg), whichever is greater. For set pressures
2250 psig (155.1 barg) and above, 50 bpm is
acceptable for both Pilot and Main Valve.
b. For all other valve types, no leakage (0 bpm) is
acceptable at 4% below valve set pressure or
2 psig (0.14 barg), whichever if greater.
(i) Paragraph 2.b(ii) refers to testing valves
with Teflon O-rings specified for elevated
temperatures above 200ºF (93 °C).
(ii) Check the unit ticket for the temperature
and verify that it is above 200ºF (93°C). Test
air/gas valves on room temperature air and
check for leakage. If the valve is tight, testing
is complete. If not, check the valve leakage on
elevated temperature air between 201-500ºF
(94-260°C).
Note: No need to pop the valve on elevated
temperature air.
Consolidated 2900 Series POSRV Maintenance Manual
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