Some  types of filters are impregnated  with a  flocculating chemist  which  agglomerates the finer particles and  makes  them easier  to  trap  but  the  basic  principle   is  still  one  of screening.

Filters  are  sometimes  divided into  "surface"  and  depth filters.  In  fact all filters except the metallic strainers are depth filters. Increasing  the pore size of the medium but at the same time increasing the depth results in fewer particles  being trapped  by  lodging in the poros , but a  larger  number  being trapped  against  the fibers of the filters.  The degree of filtration is generally loss, but the resistance to flow is the also with a depth filter, and the effective life is greater. It is  possible  to produce a depth filter of coarse material in grate depth having  the  same degree of filtration as a very fine surface filter, but the resistance to flow is usually prohibitive Normal practice is to compromise either with a fine short-life depth  filter, such as a porous paper, or with a slightly more coarse but longer-life depth filter, such as a felt.  Both  have their proper uses.

A device that is used to remove something unwanted from a liquid or gas that passes through it is called filter.

INTRODUCTION
TYPES OF FILTER
(A) AIR FILTER
(I) OIL WETTED MESH TYPE
(II) DRY AIR TYPE
(III) OIL BATH TYPE
2. CONSTRUCTION
TYPES OF ELEMENTS
DRY TYPE - IT HAS THE FOLLOWING CHARACTERISTICS
WET TYPE - IT HAS THE FOLLOWING CHARACTERISTICS
TYPES OF FILTER MEDIUM FOLDS:
1. CHRYSANTHEMUM SHAPE
2. HONEYCOMB
FILTER MEDIA
SPECIFICATION OF PAPER FILTER
(2) FUEL FILTER    17
SIX PRINCIPAL FILTER ELEMENTS HAVE BEEN USED FOR MANY YEARS:
CONSTRUCTION PLEATED FITER ELEMENT
SPECIFICATION OF FILTER PAPER
(3) OIL FILTER –
FILTER MEDIA:
USES AND APPLICATION
B.I.S. SPECIFICATION
PROCESS FLOW CHART
MANUFACTURING PROCESS OF AIR/FUEL/OIL FILTER CARTIRIDGE
NORMALLY TAKEN RECOVERS TO THE FoLLOWING STEPS:-
MAIN STEPS ARE GIVEN BELOW:
PLEATING
TESTING OF AIR FILTER
TESTING OF FUEL FILTER
TESTING OF OIL FILTER
MARKET SURVEY
INDIA AUTOMOTIVE FILTER MARKET FORECAST & OPPORTUNITIES, 2021
INTRODUCTION
MARKET SIZE
INVESTMENTS
GOVERNMENT INITIATIVES
ROAD AHEAD
WORLD DEMAND TO RISE 7.6% ANNUALLY THROUGH 2015
CHINA, INDIA, INDONESIA AMONG FASTEST GROWING NATIONAL MARKETS
EXPORT DATA OF OIL FILTER SET
EXPORT DATA OF FUEL FILTER SET
EXPORT DATA OF AIR FILTER SET
PLANT LAYOUT
MANUFACTURERS/SUPPLIERS OF AUTOMOBILE FILTER
SUPPLIERS OF RAW MATERIALS
SUPPLIERS OF CR SHEET
SS SHEET
SUPPLIERS OF STEEL WIRE
SUPPLIERS OF FILTER RUBBER GLAND
SUPPLIERS OF STEEL WIRE NET
SUPPLIERS OF FILTER PAPER
SUPPLIERS OF COTTON FILTER CLOTH
SUPPLIERS OF SEALANT ADHESSIVE
SUPPLIERS OF PLANT AND MACHINERY
SUPPLIERS OF FILTER ELEMENT MAKING PLANT
PUNCHING PRESS
POWER PRESS
SHEARING MACHINE
ROLLING MACHINE
BENDING MACHINE
POWER TRANSFORMER
SUPPLIERS OF ELECTRICAL PANEL
SUPPLIERS OF COOLING TOWER
EFFULENT TREATMENT PLANT
AIR POLLUTION CONTROL EQUIPMENTS
AIR COMPRESSOR    109
PLATFORM WEIGHING MACHINE (DIGITAL)
MATERIAL HANDLING EQUIPMENTS
FIRE FIGHTING EQUIPMENTS
SHOT BLASTING MACHINE

APPENDIX – A:

1.      COST OF PLANT ECONOMICS
2.      LAND & BUILDING
3.      PLANT AND MACHINERY
4.      FIXED CAPITAL INVESTMENT
5.      RAW MATERIAL
6.      SALARY AND WAGES
7.      UTILITIES AND OVERHEADS
8.      TOTAL WORKING CAPITAL
9.      COST OF PRODUCTION
10.      PROFITABILITY ANALYSIS
11.      BREAK EVEN POINT
12.      RESOURCES OF FINANCE
13.      INTEREST CHART
14.      DEPRECIATION CHART
15.      CASH FLOW STATEMENT
16.      PROJECTED BALANCE SHEET

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