Veeraja IndustriesA trusted name in

liquid filtration and swarf removal

WORKS81/3 SHED NO 3, DANGAT VASTI,

NEAR AGARWAL GODOWN,SHIVANE, PUNE.

TEL : +91 (020) 25294477 , 25291229

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BACKWASHABLE CANDLE FILTER

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BACKWASHABLE CANDLE FILTER

TOP END FITS INTO SEPERATION PLATE

SPRING COMPRESSES DURING

BACKWASHING

DIRTY FLUID IN CLEAN FLUID OUT

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WORKING PRINCIPLEn Candles are made of thin corrugated discs loaded on

hollow pipe with holes.n Compression is maintained on disc with help of springs

at bottom of each candle.n Housing is divided in 3 sections :¨ Lower dirty section¨ Seperator plate¨Upper clean dome

n Numerous candles are mounted on separator plate.n Hollow pipe of every candle opens in Upper clean dome.

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n Dirty fluid in lower section passes from outer area to inner hollow tube.

n Dirt accumulates on the outer surface of candle.n Clean fluid passes through hollow tube to Upper clean

dome.n Dirt accumulation increases the differential pressure,

triggering Backwashing of entire housing(s).

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NORMAL CYCLE

n Dirty Inlet and Clean Outlet valves are OPEN

n Pressure differential between INLET and OUTLET is continuously monitored

n At pre-set pressure, signal is given for back-washing of candles

VENT PORT

PURGE AIR PORT

BACKWASH OIL OUTLET PORTPURGE OIL OUTLET PORT

BACKWASH AIR PORT

N1

N4

N2

N6N5

N7

N3

CLEAN OUTLET

DIRTY INLET

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FILTER DRAIN MODE

n INLET and OUTLET valves are closed.

n Purging Valve N3 and Purging drain Valve N6 are OPENED.

n Compressed air is let in through N3 in bottom portion of housing.

n Dirty fluid in lower section is drained back into dirty tank.

n After pre-set time both valves CLOSE

N1

N4

N2

N6N5

N7

N3

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BACK-WASH MODEn Backwash Valve N7 and

Backwash drain Valve N5 are OPENED.

n Compressed air is let in through N7 in top section of housing.

n Pressurized air and clean oil pass through each candle IN to OUT into lower section

n Slurry of oil and dirt is drained through N5 into bin / oil recovery.

n After pre-set time both valves CLOSE

N1

N4

N2

N6

N5

N7

N3

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VENT MODE

n INLET and OUTLET valves are OPENED.

n Vent Valve N1 is OPENED.n Housing starts filling up.n Trapped air escapes through

N1n After pre-set time Vent valves

CLOSES

n Back-washable cycle is complete and Housing starts with NORMAL cycle again.

N1

N4

N2

N6N5

N7

N3

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Typical honing dirt output( Actual on-site at Maruti-Gurgaon KB3 Block )

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APPLICATIONS

n GRINDING

n HONING

n LAPPING

n WASHING FLUID

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ONLINE RESULTS ON WORKING SYSTEMS

8 to 15 PPM on

0.8 µm TEST PAPER

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LIFE EXPECTANCY

n 25000 WORKING HOURSn CANDLES NOT REPLACED FOR LAST 5

YEARS IN SYSTEM WITH PRE-FILTERn OIL NOT RELACED IN LAST 5 YEARS

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BENEFITS

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

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EXCISTING SYSTEMSn 150 LPM pilot project for Lapping Paste working since 2003n 500 LPM working since 2004n 750 LPM working since 2005n 300 LPM and 450 LPM commissioned in 2006n 1100 LPM commissioned in October 2007n 1500 LPM commissioned in January 2009n 200 LPM commissioned in SKF in January 2009n 200 LPM commissioned in SKF Haridwar in November 2009n 300 LPM commissioned in Maruti in January 2010n 250 LPM installed for Bosch Nasikn 300 LPM under manufacturing for Nagel