Common causes of damage to compressor dry gas seals

Common causes of damage to compressor dry gas seals

One-way groove reversal or low speed condition

In the process of dry gas sealing, due to the installation error, the driving end and the non-driving end are reversed, the unit parking is inevitably reversed, and the low-speed warming working condition exists, resulting in seal damage, and the ring is directly broken when severe.

(2) The rear isolation seal fails and the outer seal is contaminated

The rear isolation seal fails and the outer seal is contaminated

During use, lubricant may contaminate the seal end face due to design or operational reasons. For example: poor bearing cavity emptying (clogging of filter cap filter), low gas flow rate, low gas volume, improper labyrinth or gap, too small orifice design, system control problems, nitrogen fluctuations or gas supply interruption, opening The parking operation sequence is wrong, misoperation, etc.

Compressor front maze failure, sealing pollution

Open parking is not handled properly, sealing pollution

During the opening and stopping process, the flow rate of the first-stage sealing gas is not easy to ensure, and the gas inside the machine is easy to smash, which causes the pollution of the first-stage sealing end face. Therefore, during the initial test driving, the pressure is low and the leakage amount is large. Before the unit is ready to drive and press, it must first inject the sealing gas for driving through the control system to avoid the pollution caused by the process gas smashing; in the process of stopping, the gas source should be switched in time to avoid the anti-pollution sealing of the process gas; During the parking period, avoid sealing pollution caused by operation and other reasons.

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