Backwash Strainer

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HARSHA FILTERSBANGALORE

• No.17, Devanahalli Road, Opp. Old Madras Road,
  Virgo Nagar Post, Bangalore 560049
• Ph080-28470691, Mob9743337230
• Email sales_at_harshafilters.com,
  info_at_harshafilters.com
• Web www.harshafilters.com

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BACKWASHABLE CANDLE FILTER
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BACKWASHABLE CANDLE FILTER
DIRTY FLUID IN
CLEAN FLUID OUT
SPRING COMPRESSES
TOP END FITS INTO
DURING
SEPERATION PLATE
BACKWASHING
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WORKING PRINCIPLE

• Candles are made of thin corrugated discs loaded
  on hollow pipe with holes.
• Compression is maintained on disc with help of
  springs at bottom of each candle.
• Housing is divided in 3 sections
• Lower dirty section
• Seperator plate
• Upper clean dome
• Numerous candles are mounted on separator plate.
• Hollow pipe of every candle opens in Upper clean
  dome.

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WORKING PRINCIPLE

• Dirty fluid in lower section passes from outer
  area to inner hollow tube.
• Dirt accumulates on the outer surface of candle.
• Clean fluid passes through hollow tube to Upper
  clean dome.
• Dirt accumulation increases the differential
  pressure, triggering Backwashing of entire
  housing(s).

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NORMAL CYCLE

• Dirty Inlet and Clean Outlet valves are OPEN.
• Pressure differential between INLET and OUTLET is
  continuously monitored.
• At pre-set pressure, signal is given for back-
  washing of candles.

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FILTER DRAIN MODE

• INLET and OUTLET valves are closed.
• Purging Valve N3 and Purging drain Valve N6 are
  OPENED.
• Compressed air is let in through N3 in bottom
  portion of housing.
• Dirty fluid in lower section is drained back into
  dirty tank.
• After pre-set time both valves CLOSE.

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BACK-WASH MODE

• Backwash Valve N7 and Backwash drain Valve N5 are
  OPENED.
• Compressed air is let in through N7 in top
  section of housing.
• Pressurized air and clean oil pass through each
  candle IN to OUT into lower section
• Slurry of oil and dirt is drained through N5 into
  bin / oil recovery.
• After pre-set time both valves CLOSE

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VENT MODE

• INLET and OUTLET valves are OPENED.
• Vent Valve N1 is OPENED.
• Housing starts filling up.
• Trapped air escapes through N1
• After pre-set time Vent valves CLOSES
•  Back-washable cycle is complete and Housing
  starts with NORMAL cycle again.

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APPLICATIONS

• GRINDING
• HONING
•  
• LAPPING
• WASHING FLUID.

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LIFE EXPECTANCY

• 25000 WORKING HOURS
• CANDLES NOT REPLACED FOR LAST 5 YEARS IN SYSTEM
  WITH PRE-FILTER
• OIL NOT RELACED IN LAST 5 YEARS.

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BENEFITS

• No Pre-coating required.
• No consumables.
• Back-washing takes places automatically.
• Compact design.
• Saves on cost of pre-coat.
• Saves on cost of Oil replacement..

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