What is the purpose of a steam quench in seal systems?

• A. To clean the atmosphere side of a seal and prevent coke buildup
• B. To boil the liquid ahead of the seal
• C. To heat the oil for viscosity change
• D. To seal the pump using steam pressure

Answer: (A)

Steam quench is used to purge and protect the atmosphere side of a seal by flushing it with steam. This helps carry away hydrocarbon vapors and air that could otherwise condense or react on the seal faces, leading to coke or deposit formation. Keeping the atmosphere side clean and free of these contaminants preserves seal performance and reliability. It’s not about boiling the process liquid ahead of the seal, heating oil for viscosity changes, or using steam pressure to seal the pump.