Process Filtration

Introduction
Contents
Introduction 2
Fabrics 3
Fabrication 3
Vacuum Belt Filter 4
Rotary Drum Filter 5
Rotary Disc Filter 6
Belt Press Filter 7
Filter Press 8
Horizontal Disc Filter 9
Leaf Filter 10
Tube Press and Multi Element 11
Candle Filter
Bag Filter 12
Vibro-Sifter and Screens 13
Filter Media 14–15
Technical Data
Process Industries cover a wide range of activities from, for example,
pigments, colors, polymers, starch, fine chemicals, environment-related and
mining industries. The enormous diversity of the products to be handled
demands a correspondingly diverse range of equipment using a wide variety
of filter fabrics and fabricated filters.
We offer:
Sefar provides standardized filter solutions for the main types of
equipment used in the process industries, based on fabrics that have
been developed by Sefar to meet the needs of the customers.
It has always been the aim of Sefar to minimize our customers’ overall
process costs by reducing waste and energy requirements by maximizing the
service life of our filter products.
– Customized solutions that meet the industry’s most stringent requirements
(e.g. high temperatures, chemical resistance and long life-time)
– Integrated production: all crucial steps from yarn production and weaving
to fabrication of ready-to-use filters
– High quality and traceability
– More than 50 years experience in the process industry
– Complete fabric range
Sefar has pioneered a number of unique products such as:
– Double-layer weave belts for vacuum belt filters
– High-temperature resistant PEEK fabrics on drum filters for the polymer
industry
– SEFAR TETEX ® MC, a sintered filter media for fine filtration
Your benefits:
– Reduced production costs (higher yield, reduced machine down-time, ...)
– Improved process safety
– Improved end-product quality
– State-of-the-art fabricated filters
– For the main equipment types we offer standardized solutions
– Sefar offers world-wide local fabrications and services
– Sefar cooperates permanently with customers and OEMs to seek
improvements to our filter solutions
2

Continuous Filters
Rotary Drum Filter
Rotary drum filters are often the
workhorse of filtration in the process
industry. The design of the different
types of drum filters reflects the enormous
variety of jobs for this filter
type and the industry. To meet this
enormous range of needs Sefar has
a unique range of monofilament and
multifilament fabrics and belts.
Calendered fabrics with smooth surfaces
Vacuum Drum Filter for Kaolin dewatering
SEFAR TETEX ® MONO with fine pores
Vacuum Drum Filter belt closure with special
rubber profile
Rubber profiles for Vacuum Drum Filters
A Overlap for the metal clipper closure
B Type of rubber profile
C Metal clipper closure
We offer
– Filter belts
– Covers
For all rotary drum filter types.
Main features
– Available in PP, PET, PA, PEEK, PVDF
and E-CTFE
– Pore size from 2 to 160 µm
– Choice of edge treatment and
edge profiles as required by the
equipment
– Closure as required for the type of
rotary drum
Your Benefits
– Optimal chemical and thermal
resistance
– No particle loss
– Good filter performance
– Easy installation
– Low maintenance costs
5

Continuous Filters
Belt Press Filter
Belt press filter belts for organic
sludges, inorganic sludges, dewatering
and deliquoring (e.g. fruit pressing)
are available as standard products.
Sefar has years of experience and has
pioneered belt press applications in
various fields.
Heavy twill weave
Belt Press for sludge dewatering
Heavy-duty metal clipper closure
Satin weave
Coated edge for maximum mechanical
resistance
We offer
– Woven fabrics
– Spiralled fabrics
For all types of filter belt presses
Main features
– Available in PET. Other materials
can be used on request
– Wide range of pore sizes and
permeability
– PU coated edges
– Stainless steel closures or nonmarking
closures
– Widths up to 3.5 m as standard,
wider belts available on request
Your Benefits
– Optimal selection of strengths,
permeability and cake release
– Belts adjusted to the different belt
press constructions
– Coated edges for a long and
trouble-free service life
– Easy installation
7

Batch Filters
Horizontal Disc Filter
Filtration of fine particles, pigments
or recovering of precious catalysts are
a few of the various applications for
horizontal disc filters. The wide range
of Sefar materials offers a unique
opportunity to match exactly individual
customer requirements. Particle retention,
cake release, cleaning properties
and life-time are key issues for the
selection of filter materials.
Horizontal Disc Filter for pigment production
SEFAR TETEX ® MULTI for maximum particle
retention and good mechanical resistance
SEFAR TETEX ® MONO for high permeability
and easy cleaning
Special edges
We offer
– Laser cut discs
– Seamed discs
– Mono- and multifilament fabrics
For horizontal disc filters
Main features
– Available in PP, PA, PET, PEEK, PVDF,
E-CTFE and PTFE
– Choice of pore sizes from 2 to 160 µm
– Customized edge design
– FDA-conform materials available
Your Benefits
– Optimal chemical and thermal
resistance
– Increased filter performance
– Easy installation
– Low maintenance costs
9

Batch Filters
Tube Press and Multi-Element Candle Filter
Tube press and multi-element candle
filters are popular in many industry
segments due to their fully automated
and smooth operation. Sefar has
a range of materials and processes
adapted to this type of equipment.
We are able to provide a wide range
of materials and diameters for tube
and candle filters.
Candle filter for the recovering of catalysts
SEFAR Tetex ® welded tube
SEFAR TETEX ® MONO fabric for candle filters
We offer
– Woven tubes
– Welded tubes
– Stitched tubes
For candle filters fabricated according
to customer specifications
Main features
– Available in PP, PA, PET, PEEK and
E-CTFE or as required
– Pore sizes from 2 to 150 µm and air
permeability down to 4 l/m 2 /s
– Tubes having integrated support
(e.g. SEFAR TETEX ® DLW)
– Tubes having smooth (calendered)
surface
Your benefits
– Optimized solutions according to
your requirements
– Improved particle retention, cake
release and cleaning properties
– Unique throughput/ pore size ratio
(SEFAR TETEX ® MC)
11

Batch Filters
Bag Filter
Strainer bags are available in a huge
variety of designs (drawstrings, wire
ring, flanged and special designs) and
materials (micron-rated, high-efficiency
meshes and felts). We show here just a
few examples.
Bag filter for the filtration of lacquers
Filter bag with a plastic ring Filter bag with steel ring Filter bag with lifting strips
We offer
– Bags with drawstrings
– Wire rings
– Plastic rings
– Special designs
For bag and strainer bag filters made
of monofilament screens, multifilament
fabrics and felts.
Availability and design of these products
depend on the geographical area
Main features
– Available in PA, PET, PP, PVDF or as
required
– Sealant steel or plastic ring, adjusted
to various types of equipment
– Customized designs, shapes and
materials possible
Your Benefits
– Standard products available for most
filter types
– Customer-specific filters to meet
special requirements possible
12

Classifiers
Round Screens
Silk screens for the food industry were
the initial product produced during the
first years in the history of Sefar.
As a screening specialist we now offer
screens fabricated from polyamide,
polyester and also stainless steel.
Our product range conforms to all of
the various requirements including
those of the FDA.
Rotary screening machine
SEFAR PETEX ® open mesh screen
Metal screen for Round Screens
Steel frame for a Round Screen
We offer
– Synthetic screens
– Metallic screens
For vibro-sifters, rotary screeners and
screening machines
Main features
– Wide choice of materials available
– Broad range of high-quality meshes
– Screens and rotary screens made
according to individual needs
– FDA-conform materials available
– Consistent tension across the screen
Your Benefits
– Optimized performance for various
screening applications
– Suitable for food applications
– Long life-time
– Abrasion resistance (heavy-duty
products)
13

Filter media
Technical data
Sefar offers a wide and complete range of fabrics and wire cloths for a huge variety of applications. The list below just shows some typical
standard fabrics for the fabricated filter products presented in this catalogue. For complete technical lists of all our fabrics and also for information
on local specialties please consult our homepage (www.sefar.com) or contact your local Sefar sales organization.
Synthetic filter media
Product reference
Mesh opening/Pore size
[µm]
Open Area
[%]
Mesh count, warp
[n/cm] / [n/inch]
Mesh count, weft
[n/cm] / [n/inch]
Diameter, warp
[µm]
Diameter, weft
[µm]
Weight
[g/m²]
Weight
[oz/yd²]
Thickness
[μm]
Screens
Bags
Disc Filters
Belts
Support Fabrics
Open Mesh Fabrics
SEFAR NITEX ®
03-10/2 10 2 190 / 483 190 / 483 28 28 40 1.2 45 x x
03-30/20 30 20 150 / 381 150 / 381 40 40 35 1.0 70 x x
03-65/25 65 25 77 / 196 77 / 196 65 65 55 1.6 110 x x
03-100/44 100 44 66 / 168 66 / 168 51 51 30 0.9 80 x x
03-150/38 150 38 41 / 104 41 / 104 95 95 60 1.8 155 x x
06-300/34 300 34 20 / 51 20 / 51 215 215 170 5.0 390 x x
06-425/46 425 46 16 / 41 16 / 41 205 205 130 3.8 365 x x
06-700/44 700 44 10 / 25 10 / 25 355 355 225 6.7 650 x x
06-1000/44 1000 44 6.7 / 17 6.7 / 17 515 515 330 9.8 890 x x
06-5000/72 5000 72 1.7 / 4 1.7 / 4 900 900 270 8.0 680 x
Open Mesh Fabrics
SEFAR PETEX ®
07-5/1 5 1 270 / 686 175 / 445 34 34 65 1.9 80 x
07-21/12 21 12 163 / 414 163 / 414 41 35 45 1.3 70 x x x
07-44/25 44 25 113 / 287 113 / 287 45 45 40 1.2 70 x x x
07-150/41 150 41 43 / 109 43 / 109 86 86 65 1.9 140 x x
07-300/36 300 36 20 / 51 20 / 51 205 205 180 5.3 405 x x
07-450/48 450 48 15.4 / 39 15.4 / 39 200 200 150 4.4 350 x x
07-840/46 840 46 8 / 20 8 / 20 400 400 280 8.3 785 x x
07-2000/51 2000 51 3.6 / 9 3.6 / 9 800 800 552 16.3 1500 x x
07-5000/72 5000 72 1.7 / 4 1.7 / 4 900 900 320 9.5 1700 x x
Open Mesh Fabrics
SEFAR ® PROPYLTEX
05-105/25 105 25 47 / 121 47 / 121 106 106 78 2.3 230 x x
05-250/29 250 29 22 / 56 22 / 56 215 215 140 4.1 430 x x
05-500/36 500 36 12 / 31 12 / 31 340 340 180 5.3 610 x x x
05-2000/51 2000 51 3.6 / 9 3.6 / 9 800 800 310 9.2 1310 x x
Open Mesh Fabrics
SEFAR CARBOTEX ®
03-105 CF 105 40 56 / 142 64 / 163 43 50 37 1.1 125 x
03-145 CF 145 46 43 / 109 52 / 132 50 52 37 1.1 135 x
03-245 CF 245 45 27 / 69 27 / 69 120 120 77 2.3 230 x
03-510 CF 510 45 13.5 / 34 13 / 33 220 140 108 3.2 330 x
14

Product reference
Construction
[l/m 2 x s] Air permeability
at 20 mm WS
[m³/m² x h]
[l/dm 2 x min]
[cfm/ft²] Air permeability
at ½” H 2
O
[g/m 2 ] Weight
[oz/yd²] Weight
[µm] Thickness
[cm] Width in stock
[cm] Width on request
Belt filter
Drum filter
Rotary disc filter
Rotary table filter
Leaf filter
Filter press
Horizontal disc filter
Centrifuge filter
Monofilament Fabrics
SEFAR TETEX ® MONO
02-1050-K 045 TWL 350 1260 210 45.5 500 14.8 440 270 - x x x x x x
02-1033-W TBA115 TWL 1300 4680 780 169 480 14.2 700 - 230 x
04-1100-K 034 TWL 300 1080 180 39 190 5.6 320 - 158 x x x
04-1001-K 060 STN 415 1494 249 54 300 8.9 400 - * x
05-1001-SK 018 STN 16 58 10 2.1 370 10.9 500 - 160 x x
05-1001-SK 005 TWL 28 101 17 3.6 295 8.7 0 - 165 x
05-1050-SK 025 TWL 95 342 57 12.4 210 6.2 320 * - x x x x
05-1001-K 079 TWL 625 2250 375 81.3 260 7.7 525 * 170 x x x x
07-1500-K 015 TWL 45 162 27 5.9 235 7.0 265 158 - x x x x
07-88-W 103 PRD 3200 11520 1920 416 300 8.9 530 155 - x x x x x
17-2032-W 155 TWL 2000 7200 1200 260 285 8.4 480 243 x
23-1001-K 105 TWL 916 3298 550 119.1 300 8.9 494 - 165 x
Double Layer Weave Fabrics
SEFAR TETEX ® DLW
05-8000-SK 007 DLW 30 108 18 3.9 420 12.4 760 - * x x x x
05-8000-K 050 DLW 400 1440 240 52.0 440 13.0 920 - * x x x x
05-8100-K 081 DLW 550 980 330 71.5 575 17.0 1100 - * x
05-8100-W 161 DLW 2300 8280 1380 299 585 17.3 1850 * - x
07-8435-SK 010 DLW 10 36 6 1.3 430 12.7 540 225 - x x x x
07-8001-K 050 DLW 400 1440 240 52.0 660 19.5 875 - * x x
08-8000-K 040 DLW 480 1728 288 62.4 645 19.1 820 255 - x x x x
17-8000-SK 085 DLW 800 2880 480 104 515 15.2 925 350 x x x x
Multifilament Fabrics
SEFAR TETEX ® MULTI
07-7-280 SK PLN 7 25 4 0.9 280 8.3 291 - 245 x x
07-15-380 W PLN 15 54 9 2.0 380 11.2 505 130 - x
03-20-390 W PLN 20 72 12 2.6 390 11.5 650 * - x
03-5524-E TWL 250 900 150 32.5 297 8.8 670 158 - x
05-6-580 K TWL 6 22 4 0.8 80 17.2 860 - * x x
05-16-600 K DLW 16 58 10 2.1 600 17.8 880 170 - x x
05-105-440 SK TWL 105 378 63 13.7 440 13.0 - - 214 x x
Heavy Monofilament Fabrics
SEFAR TETEX ® HEAVY
07-7100-001 TWL 2/2 4700 16900 2820 578 1390 41.2 2390 * x
07-7100-002A TWL 2/1 2900 10440 1740 356 1380 40.9 2000 * x
07-7100-003 TWL 3/2 4000 14400 2400 492 1640 48.6 2640 * x
07-7100-006 TWL 6/2 2500 9000 1500 308 1550 45.9 2280 * x
07-7100-868A Spiral 3200 11500 1920 394 1700 50.4 2500 * x
07-7100-868B Spiral 5700 20500 3420 701 1360 40.3 2500 * x
07-7100-252A Spiral 3500 12600 2100 430 1350 40.0 1950 * x
07-7100-252B Spiral 4500 16200 2700 554 1100 32.6 1950 * x
* see technical List
Spiral type of fabrics on request.
Product descriptions and availability may depend on geographical area.
15

www.sefar.com
Headquarters
Sefar AG
Hinterbissaustrasse 12
9410 Heiden – Switzerland
Phone +41 71 898 57 00
Fax +41 71 898 57 21
filtration@sefar.com
Sefar Filtration Subsidiaries
Sefar Inc.
Buffalo, Depew, NY – USA
Phone +1 800 995 0531
filtration@sefar.us
Kansas City, MO – USA
Phone +1 800 283 8182
kcfiltration@sefar.us
Sefar BDH
Chicoutimi – Canada
Phone +1 418 690 0888
info.bdh@sefar.com
Sefar S.A. de C.V.
Iztapalapa, D.F. – Mexico
Phone +52 55 2291-0652/5612-7696
info.mexico@sefar.com
Sefar Tenyl
Tenyl Tecidos Técnicos Ltda.
Guarulhos, SP – Brazil
Phone +55 11 2137-1555
contato.brasil@sefar.com
Sefar Singapore Pte. Ltd.
Singapore
Phone +65 6299 9092
info.sg@sefar.com
Sefar Pty Ltd.
Huntingwood, NSW – Australia
Phone +61 1300 306 661
sfs@sefar.com.au
Sefar Filter Specialists Ltd.
Auckland – New Zealand
Phone +64 9622 3330
salesnz@sefar.com
Sefar Fyltis S.A.S.
Lyon 03 – France
Phone +33 472 13 14 15
vente@sefar-fyltis.fr
Sefar Italia S.r. l.
Collegno-Torino – Italy
Phone +39 011 42001
info@sefar.it
Sefar Maissa S.A.
Cardedeu – Spain
Phone +34 9 3844 4710
info.maissa@sefar.com
Sefar GmbH
Edling – Germany
Phone +49 8071 90 400-0
info@sefar.de
Sefar Filtration Solutions
(Suzhou) Ltd.
Jiangsu Province – China
Phone +86 512 62836383
info.cn@sefar.com
Sefar Singapore Pte. Ltd.
Indonesia Rep. Office (Filtration)
Jakarta Barat – Indonesia
Phone +62 21 5890 2065/66/68
info.id@sefar.com
Sefar Fabrication (Malaysia) Sdn Bhd
Johor, Malaysia
Phone +60 7 867 7188
info.my@sefar.com
Sefar Filtration (India) Pvt. Ltd.
Bhiwandi – India
Phone +91 2522 271139 / 271140 / 271141
info.in@sefar.com
Sefar B.V.
Lochem – Netherlands
Phone +31 573 258 250
info@sefar.nl
Sefar Ltd.
Bury, Lancs – England
Phone +44 161 765 3530
sales@sefar.co.uk
Sefar SP. z o.o.
Poznan, Poland
Phone +48 511 467 467
info-pl@sefar.com
3105-0254-000-00/05.2011