Case Studies

The Problem

An international chemicals manufacturer required support when their refrigeration compressor train suffered an unplanned outage.

Both LP and HP compressors had become inoperable as a result of heavy internal contamination and unacceptable seal oil leakage levels to sour drain.

To compound the problem, the spare seals had not been repaired and the normal lead time for repair was 6-8 weeks. However the compressors had to be back on line in less than 2.

The Solution

The Kaydon oil seals were removed from both compressors and sent to NASH for evaluation.

All 4 seals were badly coked on the process side surfaces and coated internally with hot oil residue.

The seals had also clearly run hot.

All 4 units were repaired and rebuilt complete with new outboard carbon bushes, new inboard carbon faces, re-coated and lapped shoulders and all new elastomers and springs.

The seals were dynamically tested and returned to site within the required time frame.

The company traced and rectified the cause of the contamination and the compressors were rebuilt and
re-commissioned in 2 weeks.

The Benefits

By developing a repair programme for Kaydon seals in the UK and Europe, NASH was able to provide a rapid response that met the needs of the client and ensured they avoided unacceptable production losses.