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Magnetic Drive Sealless Pump Smooths Caustic Unloading Operation (Chemical Processing : May 1990)

From Magnatex Pumps, Inc.
 

 
The Ethyl Corp. Petroleum Additives Div., Suaget, Ill. Plant receives 50% caustic (sodium hydroxide) raw material by tank trucks. The caustic was formerly unloaded from truck to storage tank by using nitrogen to pressurize the tank truck, providing a flow rate of 40 gpm. Their objective was to install a pump to increase the unloading rate form 400 to 200 gpm, and to enhance the operating efficiency and decrease demurrage costs. Ethyl's engineers wanted assurance that the pump would minimize exposure of the caustic to the operator, maintenance personnel and the environment - whether in vapor, liquid or solid form. The 50% caustic solution to be pumped has a relatively high freezing point of 50 degrees F. Experience with similar fluids in similar applications (i.e. intermittent service) revealed that pumps with conventional mechanical seals were being repaired approximately once every four months. In January 1988, the plant installed a magnetic drive sealless pump.
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