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Bolted Cover Design, Basket Strainer Manufacturer
Easy Removable filtering element Basket Strainer Manufacturers
Screen Available from 2 mesh to 800 mesh (up to 5 microns)
Fabricated Basket Strainer as per ASME VIII Manufacturer
Higher Flow Area Basket Strainer on request Manufacturers
Special on demand : Rubber Lined Basket Type Strainer,
PTFE Lined Basket Type Strainer,
Jacketed Basket Type Strainer,
Tailor Made Basket Type Strainer Manufacturer & Exporters
.
What is Basket Strainer?
An
official definition adopted by the Fluid Controls Institute is
: “A closed vessel with cleanable screen element designed to
remove and retain foreign particles down to 0.001 inch
diameter from various flowing fluids.” Note the term
“foreign particles”. Strainers do not necessarily remove
only dirt. They take out material which is not wanted in the
fluid and this can sometime be a valuable product which may be
saved.
Basket
Strainer designed for remove foreign matter from pipe lines
and provides protection for pumps, meters, valves, and other
similar mechanical equipment, which is called as Strainer.
Basket Strainers feature top removal of the screen. The screen
is in the form of a basket, with a lifting handle, so that all
particulate captured and retained by the screen can be easily
removed for disposal. The particulate matter is captured in
the strainer basket. The line is then temporarily shut down
and the basket removed for cleaning or replacement. Baskets
are fabricated from stainless perforated sheet. The Basket
Strainer is also called as Pot Strainer. The strainer improves
the clearance in the medium, and prolongs the life of valves;
protect expensive pumps, meters and other equipments. It is
suitable for water, Air, Gas, petroleum, steam and other
fluids.
Dharmi Engineers manufacturer & exporter of wide range of
Industrial Strainer such as Basket Type Strainer, “Y” Type
Strainer, Pot Type Strainer, “T” Type Strainer, Magnetic
Type Y Strainer, Conical
Strainer, Simplex Strainer, Inline Strainer, Basket Strainer,
Duplex Basket Strainer etc.
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The
Difference between Strainer & Filter
Actually
there isn’t any since a strainer is, in reality, a coarse
filter. The question is then one of semantics. Generally it is
assumed that if the particle to be removed is not visible to
the naked eye, the unit is filtering, and if the particle is
visible, the unit is straining. The average human eye can
detect a specific particle between 50 and 70 micros. Most
people cannot see anything smaller than 325 mesh, or 44
microns. Since 200 mesh is equivalent to 74 microns, a general
rule would be that if the screening device is coarser than 200
mesh, it is a strainer and if it is finer than 200 mesh it is
a filter.
One
of the best uses for a strainer is in conjunction with a
filter. By installing a strainer directly ahead of a filter,
the large heavy pieces which would quickly clog the filter are
removed. The filter is then free to do its major job of fine
particle removal and does not have to be cleaned so often
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What
is Strainer Open Area Ratio & Important
Amount
of free open area is the ratio of the open area through the
strainer basket to the cross sectional area of the pipe. A
common term used in strainer design is “Open Area Ratio”
(OAR) equals the total open basket area divided by the
internal cross-sectional area of the inlet pipe. It is a
measure of relative debris-holding capacity and is usually
between 1 to 4 times the inlet pipe area.
The
open area ratio in strainer element refers to the amount of
free open of the strainer and basket element. It is the ratio
of the open area through the strainer basket to the cross
sectional area of the pipeline. Anything less may cause
excessive pressure drop. The ratio is calculated with a clean
basket and as the basket begins to clog the ratio will drop.
Unless there is a wide safety margin the area through the
basket may quickly become smaller than the pipe area. This
will reduce flow through the strainer and necessitate very
frequent cleaning. A small open area ratio also means the
holding capacity of the basket is small - an important
consideration if the amount of solid matter to be removed is
large.
Open
Area Ratio
=
Total Basket Element Open Area / Inlet Pipe Cross Sectional
Area (in. squared)
To
determine the anticipated maximum differential pressure (DP),
it is common to request the DP at 75% blockage. At 75%
blockage, there is a 75% reduction in flow area compared to
clean, and a DP equal to approximately 4X that of the clean DP
Value. This is based on a proportional analysis with open
basket area being inversely proportional to DP.
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How to select right Strainer Element?
The
strainer element (it can be for y type strainer for basket
type strainer) is the heart of a strainer since this is where
the unwanted material is trapped. Strainer baskets elements
are made of perforated sheet metal and a wide range of opening
sizes is available. The size of the basket perforation should
be slightly smaller than the minimum particle size to be
removed. Using a smaller perforation opening than necessary
only means the basket will fill and clog more quickly and have
to be cleaned more often. By the using of fine element mesh
sheet along with peforated sheet can achive fine filtration up
to 5 Micron.
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When to Clean Basket Strainer Element?
Strainer
basket element should be cleaned on a regular basis, not when
they become clogged, to insure that they are not damaged by
too high a differential pressure. One more reason for frequent
cleaning is a phenomenon known as “runaway buildup”. As
dirt in a strainer basket accumulates and as the mesh or
perforations plug up, pressure drop increases. The curve of
this pressure difference is not a straight line. It starts out
as a low slope, but as the basket clogs more and more it turns
upward faster and faster. As the dirt builds up the free open
area in the basket gets smaller and smaller.
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