方案十一

　　What

　　Seal flush from pump discharge through cyclone separator

　　and cooler

　　Combination of Plan 21 and Plan 31

　　Why

　　Seal cooling

　　Solids removal from flush and seal chamber .

　　Where

　　High temperature service ,typically less than (350F)

　　Dirty or contaminated fluids ,water with sand or pipe slag

　　Non-polymerizing fluids

　　Preventative Maintenance

　　Seal cooler and piping must have air vents at highest

　　elevation-vent before starting

　　When using 682 Seal Cooler ,pipe with series flow to

　　maximize heat transfer .Cyclone separator works best on

　　solids with a specific gravity twice the process fluid .Seal

　　chamber pressure must be nearly equal to suction pressure

　　for proper flows .Typical failure mode is clogged separator or

　　pipes -check temperatures at pipe ends .