External quench on atmospheric side of seal
Quench fluids typically steam ,nitrogen ,or water .
Prevent solids buildup on atmospheric side of seal .
Used with single seals .
Oxidizing fluids or fluids that coke ,hot hydrocarbons .
Crystallizing fluids or fluids that salt out .
Cold fluids less than (32F)
Quench inlet should on top of gland with outlet /drainon
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 .