Thermo Scientific SOLA II Flare, Руководство пользователя

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Chapter 8
Maintenance & Troubleshooting
7. Each sample flow path flows through a dedicated check valve. Once the
flow exits the check valve outlet, the flow paths tee together and pass
into the inlet of the back pressure regulator. If one of the check valves is
leaking or malfunctioning, this could simulate a leak. In the first stage
of the leak test, the flow moves through the six-port valve to the check
valve on that flow path. Cap the inlet of the check valve on the 10-port
valve’s flow path to ensure the check valve is functioning properly.
8. Turn the external source of nitrogen off, but leave it connected so
pressure remains on the system. Pressure should be at 30 psig on the
forward and back pressure regulator gauges. Monitor this for at least 15
minutes to make sure this pressure holds steady and does not bleed
down. If the pressure holds, remove the cap from the check valve and
make sure the pressure continues to hold.
9. If the pressure bleeds down once the cap has been removed, the check
valve must be disassembled and cleaned or replaced and then rechecked
for a leak.
10. Once pressure without the cap remains continuous, replace the tubing.
11. Turn V3 On in the Diagnostics menu (refer to step 2). This will push
the external nitrogen source through the 10-port valve. Turn the
external source of nitrogen back on and repeat steps 6-9 above,
including capping the inlet of the check valve from the sample outlet of
the 6-port valve. If all pressures hold, remove the external source of
nitrogen from the forward pressure regulator.
12. Continue on to test the clean nitrogen inlet.
Clean Nitrogen Leak
Test
The last critical flow path is that of the clean nitrogen. The clean nitrogen
regulator, located in the pneumatic section of the SOLA II Flare, should be set
at 30 psig. Additionally, an external source of nitrogen should be connected to
the clean nitrogen bulkhead on the left side of the unit. The external source
should also be set at 30 psig. This flow path is through V3, the range select
valve. All tubing leaving V3 should already be leak tested from the sample flow
leak test. The only port on the V3 valve that has not been checked is the clean
nitrogen inlet.
1. Ensure the outlet of the back pressure regulator outlet is still capped.
2. Make sure the clean nitrogen is set at 30 psig and verify that pressure is
at 30 psig on the back pressure regulator gauge.
Thermo Scientific SOLA II Flare User Manual 8-5