BOSCH – Diesel Injector Nozzles


BOSCH Nasik is manufacturer of Diesel Injector nozzles. Their CRI (Common Rail Injection) nozzles are commonly used in all latest automobiles.

The fine bore of nozzles is precisely ground. Hence very fine filtration is mandatory. Traditional methods of filtration have very high consumable cost. Hence a solution with high filtration quality but low operational cost was required.

The backwashble candle filter was developed in 2003 after regular discussions with technocrats from BOSCH Nasik.
After evaluating the systems following was concluded:
  • Filtration clarity improved drastically.
  • Oil not been replaced since commissioning of first system.
  • Tanks not cleaned since commissioning of first system.
  • Media consumption dropped by 100%
  • Maintenance reduced on pumps, machine slides and coolant nozzles
  • Reduced break-downs.
  • Improved Tool life as the wheel dressing frequency reduced.
From 2003 to 2009 following centralized system have been commissioned
  • 150 LPM for Lapping paste removal from washing machine using MTO – pilot project
  • 500 LPM in 2004
  • 750 LPM in 2005
  • 300 LPM and 450 LPM in 2006
  • 1100 LPM in 2007
  • 1500 LPM in 2009
Main feature of the systems are as follows:
  • Fluid is pumped from machines using pumpover stations.
  • Vacuum filter is used as a primary separator. In some cases a mesh filter is provided to nullify the consumable cost.
  • Pumps used on vacuum filter itself pump the fluid to backwashable candle filters.
  • Clean pumps supply pressurized fluid to machines.
  • Secondary cooling through PHE is provided.
  • Pumps are VFD controlled to maintain pressure and reduce electrical consumption.
  • PLC controlled panel with touch screen user panel controls the complete system.