Swagelok Changeover SCO, Руководство пользователя, Страница: 19 / 20

SCO User Manual
19
Troubleshooting
Symptom Cause Remedy
HP inlet pressure gauge
shows no (or low)
pressure.
There is an obstruction upstream
of the SCO. Check that flow is passing through the inlet subassemblies
by checking inlet vent needle/bleed valve.
There is no process pressure. Check that the supply line is pressurized.
The inlet vent valve is open. Close the vent valve.
LP outlet gauge shows
no (or low) pressure.
Bottles are empty. Change bottles.
Outlet regulator set to zero outlet
pressure.
Adjust regulator outlet pressure.
Relief valve is set at too low of a
pressure.
Check relief valve set point and outlet regulator pressure
setting. If relief valve needs to be reset, contact your
authorized Swagelok sales and service center.
Outlet regulator damaged. Inspect, repair, and/or replace regulator.
LP outlet gauge shows
high pressure.
Regulator creep. Inspect, repair, and/or replace regulator.
Pressure gauge is damaged. Inspect, repair, and/or replace gauge.
Additional pressure source
downstream in system.
Identify and correct system malfunctions.
Changeover function not
operating properly. Changeover handle assembly has
slipped. Check alignment marks on changeover handle hub and
shaft assembly. Refer to maintenance section.
Secondary source
pressure is dropping/
both sources draining
simultaneously.
Regulator creep. Inspect, repair, and/or replace regulator.
Both source bottle pressures are
below the changeover point.
Replace both source bottles.
Inlet vent valves leaking. Inspect, repair, and/or replace inlet vent valve.
Inlet vent valve open. Close inlet vent valves.
Relief valve is relieving
pressure.
Incorrect relief valve set point.
Check relief valve set point. If relief valve needs to be reset,
contact your authorized Swagelok sales and service center.
Regulator creep. Inspect, repair, and/or replace regulator.
Additional pressure source
downstream in system.
Identify and correct system malfunctions.
For any symptoms not identified in the above table, please contact your authorized Swagelok sales and service center.