Type 310A
8
outlet pressure was factory-set at the mid-range of the
pilot control spring. Before beginning the startup
procedures in this section, make sure the following
conditions are in effect:
• Block valves isolate the regulator
• Vent valves are closed
• Hand valves are closed
• A bypass, if any, is in operation
In all cases, check the control spring setting to make
sure it is correct for the application.
CAuTIOn
Introduce pilot supply pressure into
the regulator before introducing any
downstream pressure, or internal
damage may occur due to reverse
pressurization of the pilot and main
valve components.
Always use pressure gauges to monitor
downstream pressure during startup.
If the downstream is pressurized
by another regulator, plan startup
procedures accordingly.
note
Pilot supply pressure must exceed
control pressure by at least
15 psig (1,0 bar) in order to operate
the regulator at rated travel.
Although remote loading or control constructions
may require separate adjustments on associated
equipment, the only adjustment normally necessary
on a Type 310A-32A regulator is the pressure setting
of the pilot control spring. Turning the adjusting
screw clockwise into the spring case increases the
spring compression and pressure setting. Turning
the adjusting screw counterclockwise decreases the
spring compression and pressure setting.
Pilot Adjustment
To adjust a standard Type 32A pilot, loosen the locknut
(key 4, Figure 9), and turn the adjusting screw (key 3,
Figure 9). Then tighten the locknut to maintain the
adjustment position.
Startup
This procedure is to be repeated in turn for each
regulator in the installation.
1. Slowly open the hand valve in the pilot supply line.
2. Slowly open the upstream block (isolating) valve
and partially open the downstream block valve for
minimum flow.
3. Slowly open the hand valve in the control line
while, at the same time, adjusting the pilot
setting if necessary.
4. Completely open the downstream block valve.
5. Slowly close the bypass valve, if any.
Working Monitor Regulator
Installation
All Type 310A-32A-32A working monitor regulators
are bench set at the factory according to the service
conditions specified on the customer’s order. Examine
the unit on arrival to make sure no damage has occurred
in shipment. Clean and blow out pipelines to be sure no
welding slag or other foreign material is present.
Figure 7.
Typical Wide-Open Monitor Installation
24B4134
B2445_2
FLEXIBLE WIDE-OPEn MOnITOR ARRAngEMEnT ThAT PERMITS
WIDE-OPEn MOnITOR TO BE EIThER uPSTREAM OR
DOWnSTREAM OF ThE WORKIng REguLATOR
MInIMuM PIPIng WIDE-OPEn MOnITOR ARRAngEMEnT ThAT
REquIRES WIDE-OPEn MOnITOR ALWAYS TO BE
uPSTREAM OF WORKIng REguLATOR
