Page 234 - Subyek Teknik Mesin - Forsthoffers Best Practice Handbook for Rotating Machinery by William E Forsthoffer

Be st Practice 3 .23 Compressor Best Practices

Fig 3.23.15 Typical tandem seal system with an interstage labyrinth-nitrogen supply

If a unit is to be retrofitted, it is strongly recommended that costs and could result in seal damage or failure by accumulating
the design of the gas seal be thoroughly audited to ensure safety debris between the seal rotating and the stationary faces. The
and reliability. As mentioned in this section, retrofitting from adequate design of the separation barriers between the lube
a liquid to a gas seal system renders the unit a separate system and seal face must be thoroughly examined and audited to
type unit, that is, a separate lube and gas seal system. Naturally, ensure reliable and safe operation of this system. Many un-
loss of lube oil into the seal system will result in significant scheduled field shutdowns and safety situations have resulted

Fig 3.23.16 Double seal (Courtesy of Flowserve Corp.)

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