Valve Switching; Valve Plumbing; Methanizer Analytical Troubleshooting - Thermo Scientific TRACE 1300 Instruction Manual

Valve Switching

Valve Plumbing

Methanizer Analytical Troubleshooting

Thermo Scientific
Table 7. Leak Testing for Valves
Symptom
Valve leaking between ports.
Valve leaking around rotor.
Leaking out valve ports
VICI® valves contain a rotor that is turned by the actuator. This rotor channels the gas
between the various ports of the valve. If the rotor is not being switched properly, a flow path
may be partially or fully blocked, or leaks may occur between valve ports.
Each valve contains a mechanical stop that should reach an extreme when the valve is rotated
in the clockwise or counterclockwise direction.
Close inspection of the valve will indicate if the valve is being switched to its limits.
Actuator pressure should be 420 kPa (60psig) to 630 kPa (90 psig).
In case of problems, see Table 8
Table 8. Causes and Remedies for Improper Valve Switching
Possible Cause
Low actuator line pressure.
Solenoid not actuating.
Actuator leaking.
Valve event not set correctly.
Verify the valve and system plumbing conforms to the appropriate plumbing diagram for your
system setup. Trace the plumbing from port to port to insure all connections are made
properly.
Table 9 lists the most common anomalies with the relevant diagnosis and remedy when the
methanizer device is used.
Possible Cause
Defective rotor.
Valve rotor not seating properly.
Rotor defective.
Ferrule not seating.
for the possible causes and remedies.
Possible Remedy
Increase line pressure.
Verify timed event is set correctly.
Check voltage at solenoid valve.
Replace defective solenoid valve.
Replace actuator.
Check valve event configuration and event in the run
table.
TRACE 1310 Auxiliary Oven Instruction Manual
5
Maintenance & Troubleshooting
Troubleshooting
Possible Remedy
Replace rotor or valve.
Tighten rotor.
Replace rotor.
Replace ferrule.
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