The cross-mounted flexible screen panels generate a revolutionary ”wave like” cascade effect in the material bed.
Sandvik WR
modular screening media
Sandvik is a global industrial group with advanced products and
world-leading positions in selected areas – tools for metal cutting,
equipment and tools for the mining and construction industries,
stainless materials, special alloys, metallic and ceramic resistance
materials as well as process systems. In 2010 the Group had
about 47,000 employees and representation in 130 countries,
with annual sales of nearly SEK 83,000 M.
Sandvik Mining and Construction is a business area within the
Sandvik Group and a leading global supplier of equipment,
cemented-carbide tools, service and technical solutions for the
excavation and sizing of rock and minerals in the mining and
construction industries. Annual sales 2010 amounted to about
SEK 35,200 M, with approximately 15,500 employees.
B5-593ENG © Sandvik SRP AB 2011. Subject to alteration without prior notice.
Unlike competing media on the left side (see red arrows), the WR system (on right side) has no blind fields in the directional flow of material.
This ensures maximum material separation and minimizes the amount of undersized particles “carry-over” in the end product.
Dismantling the screen panels, once they are worn out, is simple. Pull out the wedge and remove the screen panels.
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S a n d v i k M i n i n g a n d C o n s t r u c t i o n. T e l. +4 6 4 0 4 0 6 8 0 0. F a x +4 6 4 0 4 0 6 8 9 8.
www.sandvik.com
Technical data
Focusing on your
maximized profitability
In order to produce the highest quality aggregates products, you need to use the very best
in screening media. The patent-pending WR
modular screening media has been designed
for use on screens with longitudinal profiles.
Thoroughly tested, the WR media has been
developed to give you high capacity and the
best screening accuracy. Its installation is
straightforward, does not require any screen
modification and therefore minimizes downtime.
WR’s tangible benefits
• Optimized screening accuracy
• Higher capacity
• Minimized downtime
• No screen modifications needed
OPTIMIZED SCREENING ACCURACY
To optimize screening accuracy, the WR modular screening media utilizes a fiber-reinforced
rubber screen membrane which enables thinner
panels and closer aperture spacing. This results
as well in a maximized open area. Furthermore,
by elevating the screen panels from the longitudinal support bars, the screen panels can be
fully perforated from side liner to side liner.
The absence of blind fields in the directional
flow of material makes sure of maximum material separation, and minimizes the amount
of undersized particles “carry-over” in the end
product (see illustration page 5).
HIGHER CAPACITY
The WR anti-blinding system screens accurately even the most difficult-to-screen materials
at exceptional capacities. The key to this is
a patent pending production technique and
pioneering design resulting in an open area in
production which is more than that in other
modular media, thereby ensuring a higher
throughput capacity. The cross-mounted flexible
screen panels generate a revolutionary ”wave like”
cascade effect in the material bed (see photo
page 5). It improves stratification, allowing
undersize material to find faster its way down
to the screening surface.
MINIMIZED DOWNTIME
In order to consistently produce the highest
quality materials at high levels of production,
it is essential that the screening media minimizes any operational downtime. The long
lasting rubber and polyurethane materials
used to make WR screen panels extend service
intervals and minimize downtime. The screen
panels have a built in cross-beam protection lip
which, together with support bar rubber capping, protects the adapter system against wear.
When it is finally time to replace the screen
panels, the wedge locking them into place is
quickly removed and reinstalled, keeping the
change-out time at a minimum. The absence of
steel reinforcement makes the WR system light,
reducing the stress on the screen and bearings
which further reduces the risk for unplanned
production stops.
Thickness
Rubber: 3, 5,5, 8, 10, 15 and 20 mm
Polyurethane: 2,5, 3,5, 5,5, 8, 10, 15 and 20 mm
VERSATILITY
The new WR system has been developed to fit
most screens on the market currently equipped with modular media on longitudinal
profiles. Made of rubber or different grades of
polyurethane, the screen panels are delivered
cut-to-length to fit any screen width on the
market. The rubber panels are fiber reinforced
and produced through a unique and innovative
manufacturing process. Rubber is primarily
used for fine to medium coarse screening in dry
applications, while polyurethane is primarily
used for wet screening.
Installation
On modular screen decks with longitudinal profiles. Mounted crosswise in
the screen on an adapter system. Maximum drop height on the top deck is
300 mm, in between decks max. 800 mm.
Free from steel, the WR system is light, easy-to-handle and environmentally-friendly.
Materials
WR8000 – 60 shore A fiber reinforced rubber
WR9000 – 90 shore A Polyurethane
Apertures
Punched holes available in all thicknesses, max. hole size 40 mm.
FR – Square holes in line. Used in normal conditions.
FS – Square holes staggered. Used to prevent fines tracking when high
fines content or on short screens.
SL, SLS – Slots with the material flow. Used when higher capacity is desired,
accuracy (oversize control) is less important and to avoid pegging in small
apertures.
ST, STS – Slots across the material flow. Used for wet screening and in
dewatering screens.
ENVIRONMENT, HEALTH AND SAFETY
Designed with operator safety in mind, the WR
system consists of rubber and polyurethane
parts that don’t contain any steel. This makes it
lightweight as well as safe to handle. The installation and replacement of screen panels are safe
and easy procedures requiring no special tools.
All parts in the system are environmentally
friendly and fully recyclable. In addition, the
use of rubber and polyurethane screen panels is
the best way to minimize the noise in the screen
area.
Applications
Designed primarily for final and intermediate stage screening, in dry and
wet applications, the Sandvik WR media is generally used with separations
between 2–32 mm with a max feed lump size between 10–100 mm.
NOTE
Do not use in applications where any amount of oil is present.
The recommended hole size should be 1.25 – 2.5 times the screen panel
thickness (punched holes).
WR8000 - recommended thickness in mm
NO SCREEN MODIFICATIONS NEEDED
Installing the WR system in a screen equipped
with longitudinal profiles is an easy and
straightforward task which requires no modifications to the screen body or sub-frame.
The WR adapter system is installed easily by
replacing the existing “nock-in bar”. The screen
panel lips are simply inserted in the crosswise
mounted profiles and locked in place with a
wedge. No bolting or special tools are needed.
Dismantling the screen panels, once they are
worn out, is equally simple. Pull out the wedge
and remove the screen panels (see photos page 5).
Installing the WR system in a screen equipped with longitudinal profiles is an easy
and straightforward task which requires no modifications to the screen.
2
3
Max particle size (mm)*
Separation
10
20
30
50
75
2
3
3
4-6
3
3
3
8
3, 5.5
3, 5.5
5.5
10-12,5
5.5, 8
5.5 8
8
16
8, 10
8, 10 8, 10
10
19-25,4
10, 15
15
15, 20
31,5
15, 20
15, 20
*Bulk density max 1,8 metric ton/m3
100
20
20
WR9000
- recommended
thickness
in mm
Max particle size (mm)*
Separation
10
20
30
50
75
2
2.5
2.5
4-6
2.5, 3.5
3.5
3.5
8
3.5, 5.5
3.5, 5.5
5.5
10-12,5
5.5, 8
5.5, 8
8
16
8,10
8,10
8,10
10
19-25,4
10, 15
15
15, 20
31,5
15, 20
15, 20
*Bulk density max 1,8 metric ton/m3
100
20
20
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