Sample Flow Leak Test - Thermo Scientific SOLA II Flare User Manual

Sample Flow Leak Test

Thermo Scientific
Caution Purge all sample lines with nitrogen until the total sulfur reading
stabilizes near zero ppm on the low range. Once the reading stabilizes, wait at
least 15 minutes to ensure all sulfur is purged from the system. Disconnect the
communication lines to prevent remote actuation of gas selection valves. Only
clean air and nitrogen are needed for the leak check. ▲
Refer to the SOLA II Flare flow diagram
test:
Note All tubing connections in the sample flow path should be checked for
tightness. ▲
Note This leak test is fairly complex and should be done in two stages. There
are two sample/nitrogen flow paths. Depending on the range selected, the
sample will flow through one injection valve while nitrogen is purging the other
injection valve. ▲
1. To begin, connect an external source of nitrogen to the sample inlet of
the SOLA II Flare. Set the pressure to 30 psig.
2. Set the clean nitrogen regulator, located in the pneumatic section of the
SOLA II Flare, to zero psig. Set the 1/8-inch, four-port range select
valve to the Off position using the input/output test under the
diagnostic menu of the SOLA II Flare. Go to Diagnostics > Input
Output Test > Set Outputs > Rng V3 Solenoid and turn the valve off.
This will push the external nitrogen source through the six-port
injection valve.
3. Disconnect any tubing and cap the outlet of the internal back pressure
regulator in the oven.
4. Set the internal forward pressure regulator in the oven to 30 psig.
5. Fully open the internal back pressure regulator (counter clockwise).
This will allow 30 psig of pressure all the way to the capped outlet port
of the back pressure regulator.
6. Referring to the
flow path with liquid leak detector. Additionally, inspect the valve slots
where the valve actuation pins are located as well as the valve preload
assemblies with liquid leak detector. If these show external valve leaks,
replace or align the valves. See the
information.
(Figure
flow diagram, inspect all connections in the sample
valve alignment
Maintenance & Troubleshooting
1-2) for the following leak
procedure for further
SOLA II Flare User Manual
Chapter 8
8-4