A Publication on World Pulp, Paper & Allied Industry

October-December'2001

Tech Watch

   

Seal water system boosts pump efficiency and slashes costs



The John Crane Safeunit seal water system ensures trouble-fee operation of pumps and process machinery while dramatically reducing water consumption, by up to 80%, to give maximum life cycle profit on investment. Experience in the USA showed a mill with 300 pumps achieving an annual savings of $300,000 through a flow reduction of 4 litres/min per pump.

This complete monitoring and control system for pump seals and seal water systems adjusts water flow and pressure to create the optimum operating environment and maximise processing plant efficiency.

Units predict seal and packing failures in advance through changes in pre-set flow and pressure values, with automatic control allowed by the use of alarm sensors. Seal water leakage is also detected to avoid extra heating and evaporation costs or expensive product quality problems such as dilution.

Simplifying pump set-up and servicing, the system has a ‘unique’ non-clog valve and can be cleaned with the equipment running. Options include electrical alarms and LCS-leakage control

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