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  • Centrifugal Pumps for Molten Sulphur and Sulphuric Acid (.pdf)
    To handle or move molten sulphur and sulphuric acid, special pump designs together with special materials of construction are necessary to achieve the best reliable solution. This article presents an overview of available pump designs and materials for these harsh services.
  • Biofuel and Ethanol Production - Pump Solutions
    Sulfuric acid, lime slurry, ethanol, methanol, glycerin, spent yeast, and waste slurries - these are just a sample of the difficult chemicals and materials pumped throughout the biofuels industry. They are also the materials that can shut down processes due to pump failures.
  • Cavitation Erosion of a Zirconium Pump Impeller in an Aqueous Hydrochloric Acid Service Environment (.pdf)
    Remnants of two zirconium impellers were submitted to IMR Test Labs (a division of Ithaca Materials Research) for post-service materials analysis. Both impellers were utilized in chemical industry circulation pump applications in the Mid-East.
  • Evaluating the performance of dual PTFE filter assemblies in hot-acid etch baths
    or etching speed is regulated by the bath temperature. A Model SMS 178-02 hot-acid cabinet (SubMicron Systems, Allentown, PA) equipped with an all-fluorocarbon pump (Iwaki Walchem, Holliston, MA) was used for these studies. The cabinet was piped with 3/4-in. PFA tubing
  • Peristaltic Pumps Provide Option for Ethanol Producers
    Sulfuric acid, ethanol, spent yeast and waste slurries are just samples of the difficult chemicals and materials pumped throughout an ethanol plant. They're also the materials that can shut down processes due to pump failure.
  • MICRO:Product Technology News (Sept. '98 p.60)
    . Featuring advanced automation capability, the implanters are designed to meet the need for increased yields and reduced die costs. The oil-free, piston-operated EcoDry L pump minimizes hydrocarbon contamination. The pump incorporates permanently lubricated and sealed bearings placed outside the vacuum
  • MICRO: Critical Materials?Chemicals
    condition in a 20-wafer-per-hour process can cause an IC manufacturer processing wafers valued at $2500 each to lose $1,200,000 per day in revenues. Abnormal flow conditions can have a variety of causes, including pump, filter, and valve or valve control issues; facilities difficulties; or human
  • Contamination: hydraulic system enemy no. 1
    it. These measures are important because water breaks down oil-additive packages, forms acids that corrode metal surfaces and, in mineral-based oils, supports oxidation. SKF, the Swedish bearing manufacturer, says hydraulic oil containing just 0.1% water by volume cuts bearing life in half, while 1

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