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方案六

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产品描述

  What

  Seal flush from pump discharge and recirculation to pump

  suction with orifices

  Combination of Plan 11 and Plan 13

  Why

  Continuous seal chamber venting on vertical pumps .

  Seal chamber heat removal

  Increase seal chamber pressure and fluid vapor margin .

  Where

  Vertical pumps .

  Clean ,non-polymerizing fluids at moderate temperatures

  Preventative Maintenance

  Use an orifice with a minimum 3 mm ( 1/8inch )diameter .

  Calculate flow rates to size orifice for adequate seal chamber

  flow .

  Increase boiling point margin with proper orifice and throat

  bushing sizing

  Flush should be directed over seal faces .

  Vent piping loop prior to starting vertical pumps .

  Typical failure mode is a clogged orifice check temperatures

  at pipe ends

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