4. Slowly open the hand valve (if used) in the
control line. The regulator will control downstream
pressure at the pilot control spring setting. See
the Adjustment section following these numbered
steps if changes in the setting are necessary
during the start-up procedure.
5. Slowly open the downstream block valve.
6. Slowly close the bypass valve, if used.
7. Check all connections for leaks.
Type VSX8 Slam-Shut Device
Refer to the Instruction Manual for Type VSX8
Slam-shut, document D103127X012, for Adjustment and
Maintenance of the Slam-shut.
Type VSX8 Installation Startup
note
The Type VSX8 slam-shut device can
be rotated 360° for easy installation
and maintenance.
Equipment installed downstream the
Type VSX8 slam shut device can be
damaged if the following procedure
for resetting the Type VSX8 slam shut
device is not followed. This equipment
includes the integral Type VSX8
regulator configurations.
Before proceeding with the adjustment
of the slam-shut device springs, the
operator must ensure upstream and
downstream valves are closed and
adjusting screws are unscrewed.
With proper installation completed and downstream
equipment properly adjusted, perform the following
procedure while monitoring the pressure with gauges.
1. Very slowly open the upstream block valve.
2.
On a Type 299HV, the Type VSX8 is shipped in
the tripped position and will need to be reset. If the
Type VSX8 is OPSO only, it can be reset before
starting the regulator. If the Type VSX8 is OPSO/
UPSO, the regulator will need to be started and
the downstream system pressurized before the
Type VSX8 can be reset. See the section for
Type VSX8 reset.
To convert an external registration regulator to a dual
registration regulator, remove the two screws and
O-rings (J in Figure 2) from the throat and use a screw
and an O-ring to block the port (G in Figure 2) between
the lower diaphragm chamber and pilot diaphragm
chamber. Remove the 3/4 NPT pipe plug in the pilot
lower casing and add a downstream control line.
Type VSX2 Slam-Shut Device
Refer to the Instruction Manual for Type VSX2
slam-shut, document D103695X012, for Adjustment
and Maintenance of the Slam-shut.
Type VSX2 Installation Startup
note
The Type VSX2 slam-shut module should
be mounted so that the spring case vent
points towards the ground.
The overpressure and underpressure
trip points can only be reset if the
Type 299HS outlet pressure is between
the overpressure and underpressure
trip points.
Startup
With proper installation completed and downstream
equipment properly adjusted, perform the following
procedure while monitoring the pressure with gauges.
1. Very slowly open the upstream block valve.
2.
On a Type 299HS, the Type VSX2 is shipped in
the tripped position and will need to be reset. If the
Type VSX2 is a high trip only, it can be reset before
starting the regulator. If the Type VSX2 is a high
and low trip, the regulator will need to be started
and the downstream system pressurized before
the Type VSX2 can be reset. See the section for
Type VSX2 reset.
3.
Use the following procedure to reset the
Type VSX2:
a.
Unscrew the brass resetting knob to open the
equalizing bypass.
b. Pull out the knob until it stops. This resets the
tripping mechanism.
c. Push in and tighten the knob.
8
299H Series
