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What
External quench on atmospheric side of seal
Quench fluids typically steam ,nitrogen ,or water .
Why
Prevent solids buildup on atmospheric side of seal .
Prevent icing
Where
Used with single seals .
Oxidizing fluids or fluids that coke ,hot hydrocarbons .
Crystallizing fluids or fluids that salt out .
Caustic .
Cold fluids less than (32F)
Preventative Maintenance
Quench inlet should on top of gland with outlet /drainon
bottom .
Quench pressure should be limited to 0.2 bar ( 3psi )or less
Use throttle bushing on atmospheric side of seal to direct
quench flow to seal drain .
Monitor regularly ,checking for closed valves ,blocked lines ,
and steam trap condition .
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