Checking Vacuum Conditions in Vacuum Towers

Depending on conditions, whether or not you can take the unit off line and isolate it to check for leaks. Let´s say that the unit is on line. Using an ultrasound detector around all connections will tell where the leaks are.

Use the dry nitrogen to check the leaking area. Place the nitrogen frm a small tube at the suspected area and look at the Vacuum gauge. If there is a leak it would cause turbulance at the vacuum gauge.

I'm don't know what these vacuum towers are but when we check vacuum chambers for leaks, we apply the vacuum then flow helium gas around the outside. A mass spectrometer inside the vacuum sounds an alarm if the helium is detected. To pinpoint any leaks we go round the joints with a small helium nozzle.

If this vacuum tower is for deaerating a water flow through the tower I'd suspect the packing gland on the feedwater inlet valve first! espeacialy if the valve is mounted towards the top of the tower. We had similar problems on such a system for a water injection facility on an oil platform in the North Sea.

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