Powder and Bulk Engineering
Saturday, August 30, 2014
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Powder and Bulk Engineering is a technical publication devoted to readers in the bulk solids market, worldwide.
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Publication Date: 03/2002
Pages: 3
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A flame-retardant additive producer replaces its rotary valves' leaky shaft packing with gas-purged solid-metal seals.

The Albemarle maintenance mechanics glared at the rotary valve metering the fluffy abrasive powder into a flash dryer on the floor below. The seal that had been repacked less than a week ago was leaking again. The mechanics would have to shut down the line and replace the valve with a standby, preventing them from meeting their production goal this day.

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