High-pressure sealing system for centrifugal compressors in ammonia synthesis loops
A specialized sealing system designed to prevent gas leakage in high-pressure centrifugal compressors used within ammonia synthesis loops, operating under extreme pressures (typically 150-300 bar) and temperatures (150-300°C) while handling corrosive ammonia-hydrogen-nitrogen mixtures. The system maintains pressure differentials between process gas and atmosphere/lube oil systems.
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Dry gas seals eliminate oil contamination risks in ammonia process, reduce maintenance, handle higher pressures, and provide lower leakage rates compared to traditional oil seals.
Nitrogen is the standard buffer gas as it's inert, prevents ammonia decomposition, and maintains proper pressure differentials. Some systems use processed synthesis gas.
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