Emerson Fisher OS2 Instruction Manual page 6

Type OS2
DOWNSTREAM SENSING LINE
OPTIONAL STRAINER
UPSTREAM
BLOCK VALVE
TYPE OSE
SLAM-SHUT VALVE
E0560
OVERPRESSURE AND UNDERPRESSURE SHUTOFF
USING ONE MANOMETRIC DEVICE
DOWNSTREAM SENSING LINE
OPTIONAL STRAINER
UPSTREAM
BLOCK
VALVE
TYPE OSE
SLAM-SHUT VALVE
E0562
OVERPRESSURE AND UNDERPRESSURE SHUTOFF
USING TWO MANOMETRIC DEVICES
Startup*
WARNING
!
To avoid personal injury or property
damage due to explosion or damage to
regulator or downstream components during
startup, release downstream pressure to
prevent an overpressure condition on the
diaphragm of the regulator. In order to avoid
an overpressure condition and possible
equipment damage, pressure gauges
should always be used to monitor pressures
during startup.
These startup procedures are for the Type OSE only.
1. Make sure the upstream and downstream shutoff valves
are closed.
2. Slowly open the upstream shutoff valve.
3. The slam-shut valve is shipped with the slam-shut
device in the tripped position. To reset the slam-shut,
*For further instructions on Types 627, EZR, EZH and EZL, refer to the corresponding instruction manual of these products.
6
UPSTREAM
BLOCK VALVE
BLOCK
VALVE
PRESSURE
REGULATOR
E0561
UPSTREAM
BLOCK
BLOCK
VALVE
VALVE
PRESSURE
REGULATOR
E0563
Figure 4. Typical Installations
follow the procedure in the Resetting the Trip
Mechanism section.
4. Slowly open the downstream shutoff valve.
5. Check all connections for leaks.
6. Adjust the slam-shut pressure setting by following the
appropriate procedures in the Adjustment section.
Adjustment
Typically, adjustments are carried out with the slam-shut
valve closed. Only the detection stage is reset (see Figure 7
and the section on Resetting the Tripping Mechanism).
Follow the procedures below for setpoint adjustment and use
the resetting tool (see Figure 8) to move the adjusting screw.
Before any adjustment, check that the
spring range installed corresponds to the
required setpoint.
DOWNSTREAM SENSING LINE
OPTIONAL STRAINER
TYPE OSE
SLAM-SHUT VALVE
MINIMUM/MAXIMUM UPSTREAM AND
DOWNSTREAM PRESSURE
DOWNSTREAM SENSING LINE
OPTIONAL
EXTERNAL TRIP
STRAINER
PRESSURE
TYPE OSE
SLAM-SHUT VALVE
EXTERNAL SIGNAL
CAUTION
BLOCK
VALVE
PRESSURE
REGULATOR
BLOCK
VALVE
PRESSURE
REGULATOR