Broad Base. Best Solutions.
Graphite Materials and Systems
Specialty
Graphites for
Mechanical
Engineering
2
Specialty Graphite and Process
Solutions – made by SGL Group.
̤̤ Advanced material, equipment,
and process solutions
̤̤ Engineered for customers from
more than 35 industries
̤̤ Tailor-made from the most
comprehensive product portfolio
̤̤ In-depth production and
material knowledge
̤̤ Consistent high quality, performance,
and service
̤̤ Attractive total cost of ownership
Broad Base. Best Solutions.
Business Unit Graphite Materials and Systems
3
Advanced solutions
enable our customers
to get ahead.
SGL Group offers advanced solutions – even for challenging applications.
We understand the specific requirements of our customers and combine
in-depth production, material, and engineering knowledge with the most
comprehensive specialty graphite portfolio. This makes us the partner of
choice to leading companies in many different industries.
Exceptional resistance to heat and corrosion, high
SGL Group covers the entire value chain of
purity and mechanical strength are just a few of
specialty graphite production, including raw
the outstanding properties which our materials
material processing, semi-finished product
offer. Specialty graphite products from SGL Group
manufacture, precision machining, purification,
achieve optimal results where other materials fail.
and coating. When it comes to engineering of
No matter what your specific requirements might
equipment and process solutions our service
be, we will identify the best solution from the most
range makes the difference: We offer mechanical
comprehensive range of specialty graphites.
and process design, production, assembly, commissioning, and service – all from a one-stop shop.
̤̤ Fine grain graphite: isostatic, vibrationmolded, die-molded, extruded
This is how we control and ensure the consistent
̤̤ Expanded natural graphite
high quality, reliability, and performance of our
̤̤ Carbon fiber-reinforced carbon (C/C)
products – and enable our customers to become
̤̤ Soft and rigid graphite felts
more competitive. Challenge us. We are there for
̤̤ Silicon carbide-coated graphite materials
you worldwide.
Additionally we use other materials like PTFE,
silicon carbide, and specialty metals.
Specialty graphite solutions for mechanical
engineering
With our portfolio and technical know-how
We help mechanical engineering companies all
spanning more than 35 different industries,
over the world stay competitive. Our innovative
we engineer tailor-made solutions in close
specialty graphite products and solutions make
partnership with our customers.
us a sought-after partner of leading companies,
b Machining the sealing ring height
especially for small production runs and one-off
custom products – and more.
4
Specialty graphites – made by SGL Group.
Solutions for mechanical engineering.
+ SIGRAFINE® is the new brand name for our fine­­
grain ­graphites, previously known under the names
RINGSDORFF®, SIGRAFORM®, SIGRAMENT® and
­CRYSTA-SIL®.
Bearings
Seal rings
Typical applications
Centrifugal pumps
Rotary joints
Compressors
Furnace applications
Process pumps
Mechanical seals
Centrifugal pumps
Rotary joints
Compressors
Water Turbines
Ventilators
Propeller shafts
Materials made of
carbon and graphite
SIGRAFINE®
Die-molded, isostatic carbon and graphite
SIGRAFINE®
Die-molded carbon and graphite
SIGRAFLEX®
flexible graphite
Products
of the SGL Group
Cylindrical bearings
Flanged bearings
Axial bearings
Seal rings
Segmented packings
Labyrinth seals
Piston and guide rings
Ball valve seals, metal sleeved rings
Steam joints
Motion control rings and segments
Reinforced graphite sheets and foil
Specialty graphite solutions for mechanical engineering
5
In mechanical engineering, virtually everything revolves
Our products are highly resistant to heat and corrosion
around motion. This calls for extremely tough and resilient
and help keep gases and liquids in motion, even under the
materials – especially when high temperatures or corrosive
toughest conditions. We also offer a wide-ranging portfolio of
substances come into play. Tailor-made solutions which
finished and semi-finished products for vacuum technology –
are ideally suited to a wide variety of different applications
for a wide variety of fields ranging from the food product
are needed in order to ensure that parts, components and
industry and medical technology to pick-and-place applica-
assemblies function safely, reliably and efficiently.
tions in general.
SGL Group is proud to be a sought-after partner in one of
the largest and most multifaceted industries in the world –
and to offer the best solutions for the most challenging of
applications.
Vanes and rotors
Semi-finished products and powders
Process pumps
Vacuum pumps
Compressors
Radial blowers
For all mechanical applications
Filler for plastic compounds
SIGRAFINE®
Die-molded, isostatic carbon and graphite
Synthetic resin-bonded graphite
SIGRAFINE®
Die-molded, isostatic carbon and graphite
Synthetic resin-bonded graphite
Vanes
Rotors
End discs
Housings
Semi-finished products
Powders
6
Fine-grain graphites
for mechanical engineering
̤̤ Best possible dry-running properties in
tribological systems
̤̤ High energy efficiency thanks to minimized friction
̤̤ Resistant to oxidizing atmospheres
up to 500 °C (932 °F) with oxidation
inhibitors up to 600 °C (1112 °F)
̤̤ High resistance to chemicals and
corrosion
̤̤ High mechanical strength
Specialty graphites for mechanical engineering
7
Specialty graphites for dry-running
compressors and vacuum pumps
based on the vane principle
cf Rotor pressed using PTS technology
Vacuum technology is used in manufacturing processes in
Our materials contribute to greater energy efficiency
many sectors of industry: chemicals and pharmaceuticals,
of processes in many different situations. They are also
the printing and paper industry, food packaging, coatings and
distinguished by their high chemical resistance and long
pick-and-place applications, to name a few. Thanks to vacuum
service life.
technology, environmentally harmful processes can often be
replaced by environmentally friendly methods, such as the use
We make rotors and vanes from pitch and synthetic
of oil-free evacuation in sensitive environments.
resin-bonded materials.
b Components made of carbon and graphite
for mechanical applications
Application-specific products for dry-running compressors and vacuum pumps
SIGRAFINE
Products
EK20 1)
EK23 1)
EK24 1)
EK40 1)
End discs
○
○
○
○
Seal rings
○
○
○
○
Vanes
Semi-finished products
○
○
○
○
Rotors
○
Housings
○
1) Information refers to the base material only. Different impregnations are available.
EK60
○
○
○
EK62
○
V1626
○
○
8
Specialty graphites for pump applications
and mechanical seals
Mechanical seals are the most widespread sealing system for
shaft seals under great pressure. Their lower leakage, friction
and wear set them apart from gland seal packages. This reduces maintenance work for the end customer. Mechanical seals
are highly versatile and are used in applications ranging from
pumps and centrifuges to agitators and mixers.
Our seal rings increase the process and product reliability of
your applications. We will be glad to assist you in selecting
suitable materials.
c Seal ring made of carbon graphite 2)
Material suitability for specific applications
Applications
Process pumps
Fuel pumps
Circulating and
circulation pumps
Submersible pumps
Products
○
Seal rings
○
Vanes
Bearings
○
EK231)
○
○
○
○
○
○
○
○
○
Seal rings
○
○
○
○
EK401) HOCHDRUCK
○
○
○
Seal rings
EK241)
○
○
Bearings
Mechanical seals
SIGRAFLEX
○
Seal rings
Gaskets
Rotary joints
EK201)
Bearings
Pumps and valves
Special seals
SIGRAFINE
○
Seal rings and packings
Bearings
○
Seal rings
○
○
1) Information refers to the base material only. Different impregnations are available.
2) Carbon graphite: a pitch-bonded, carbonized material with high graphite content
○
○
○
○
○
○
○
○
ECONOMY
○
Specialty graphites for mechanical engineering
9
Specialty graphites for other applications
c Cup and ball bearings
There are many more mechanical engineering applications
which can benefit from carbon and graphite components,
ranging from textile machines and cooking ovens to belt chain
conveyors. We offer scores of products to aid our customers
in their work, including sliding rails, motion control rings,
c Steam joints
bearings and semi-finished products.
Material suitability for specific applications
Applications
Blowers
Cooking ovens
Bearings
Aquarium pumps
Bearings
Textile machines
EK231)
EK241)
EK401)
○
○
○
○
○
○
EK62
V1626
○
○
○
Bearings
○
Motion control rings
and segments
○
Sliding rails
EK60
○
Vanes
Bearings
Cigarette production
EK17
Rotors
Belt chain conveyors
Flow meters
SIGRAFINE
Products
○
1) Information refers to the base material only. Different impregnations are available.
○
10
Development partnership
yields new material
One of our customers’ requirements led to
the development of a new, special synthetic
resin-bonded graphite material. Our close
cooperation gave rise to a material with
significantly improved wear properties,
and greater strengths during operation.
The new material significantly reduces
the wear rates of vanes in dry running
compressors and vacuum pumps
and considerably extends lifetime.
This is just one example of an applicationspecific optimized solution from the
SGL Group.
fine-grain graphite
11
Materials made of
SIGRAFINE® fine-grain graphite
Outstanding mechanical, thermal and chemical properties make fine-grain
graphite the first choice for many mechanical engineering applications.
Enhancement with various impregnations
Another option in our portfolio is the wide range
of all-carbon varieties made of synthetic resin-
Metal, phosphate and synthetic resin impregnations
impregnated, carbonized carbon which boast the
improve physical properties and reduce wear.
following advantages:
SGL Group offers a suitably large selection of
̤̤ Metal-free
impregnations:
̤̤ Enhanced chemical resistance
̤̤ Synthetic resins
̤̤ Greater resistance to temperatures than
̤̤ Salts and saline solution impregnations
materials impregnated with synthetic resins
̤̤ Metals and metal alloys such as antimony
and bronze
b Vacuum pump
Material data for our SIGRAFINE® fine-grain graphites
SIGRAFINE
Typical properties
Density
Units
Die-molded carbon and graphite
Isostatic graphite
EK20
EK23
EK24
EK40
EK60
V1626
g/cm³
1.70
1.75
1.70
1.70
1.73
1.85
Rockwell B
105
105
105
95
80
90
Flexural strength
MPa
55
40
60
35
80
58
Compressive strength
MPa
155
100
180
100
120
150
Young’s modulus
GPa
22
14
18
10
22
13
10−6K−1
3.0
5
4.1
4.5
11.0 1)
4.0
Hardness
Thermal expansion
(20 – 200 °C/68 – 392 °F)
Thermal conductivity
Thermal resistance in ox. atm.
1) from 20 °C (68 °F) to 150 °C (302 °F)
Wm−1K−1
12
13
14
25
6
73
°C (°F)
350 (662)
350 (662)
350 (662)
500 (932)
180 (356)
600 (1112)
12
Characteristic properties
Die-molded materials made of SIGRAFINE exhibit
Wear behavior depending on counterfaces
Tungsten carbide
exceptional properties when it comes to service life.
wear behavior, such as the following:
̤̤ Combination of materials
̤̤ Sliding velocity
̤̤ Stress
Wear [µm/h]
10
There are many different factors which generally influence
EK2200
EK3205
1
0.1
0.01
0
̤̤ Surface finish of the contact surfaces
2
4
6
8
10
12
This means that we have to search the entire system in order
to find the best material solution.
Wear [µm/h]
̤̤ Operating conditions.
1
Silicon carbide
10
̤̤ Solid impurities in the medium to be sealed
EK3205
EK2200
0.1
0.01
0
6
4
2
8
10
12
Specific load [N/mm2]
We provide professional, technical and individual advice
c Friction and wear depend on the counterface materials, environmental
i­ nfluences and stress profile. In this case: Wear behavior of EK2200 and
EK3205 for counterfaces made of materials, a constant sliding speed of 9 m/s
(29.5 ft/s) and increasing stress. Medium: demineralized water.
based on long standing experience.
of carbon at a constant sliding speed of 1 m/s (3.3 ft/s) and with increasing
­specific load in wet and dry running.
EK2240 = EK24 synthetic resin-impregnated
EK3245 = EK24 antimony-impregnated
EK2200 = EK20 synthetic resin-impregnated
EK3205 = EK20 antimony-impregnated
Wear behavior: wet running
Wear behavior: dry running
dh Wear behavior of machined plain bearings of various SIGRAFINE grades
EK200
EK20
EK24
1
10
EK2240
EK24
EK305
EK2240
EK3245
EK3245
EK2200
EK3205
1
Wear [µm/h]
Wear [µm/h]
0.1
0.01
0
1
2
3
4
5
Load [N/mm2], bearing ø 30/20 x 20 mm (ø 1.18/0.79 x 0.79 in)
0.1
0
0.5
1.0
1.5
2
2.5
3
3.5
Load [N/mm2], bearing ø 30/20 x 20 mm (ø 1.18/0.79 x 0.79 in)
fine-grain graphite
13
c Radial bearing produced in PTS technology
Materials made of SIGRAFINE also boast impressive
Thermoplast
0
Gray cast iron 20 (Ra ≈ 0.3)
SiC discs (Ra ≈ 0.2)
0.9
0.9
EK3205
0.8
0.7
0.7
0.6
0.6
0.5
0.4
EK3245
0.3
0.2
EK20
0.1
EK24
0
0
60
Disc temperature [°C]
80
100
120
EK3245
EK3205
0.8
Coefficient of friction [µ]
Coefficient of friction [µ]
Stainless steel
11 m/s (36.1 ft/s), a relative relative air humidity between 36 % and 43 % and
a heated disc.
100
Carbon graphite
dh The coefficients of friction were determined in a pin-on-disc test at
200
Aluminum oxide
the system’s lifetime.
300
Platinum
overheating. This prevents excessive wear and prolongs
Silicon carbide
surrounding components and prevents the system from
400
Graphite
SIGRAFINE is many times more conductive than the
Copper
thermal conductivity.
Therm. conductivity [Wm−1K−1]
Thermal conductivity of various materials
0.5
0.4
EK2200
EK24
EK2240
EK20
0.3
0.2
0.1
0
0
60
Disc temperature [°C]
80
100
120
14
Materials made of SIGRAFINE make a major contribution
to process reliability thanks to their great resistance to
temperature and thermal shock.
What’s more, the coefficient of thermal expansion can be systematically controlled during material production in order to
optimally match SIGRAFINE components to the counterface
material. We help our customers accomplish this with our
well-founded material know-how and extensive advice.
c PTS seal rings made of die-molded carbon
Graphite features the highest thermal
Thermal shock resistance of various materials
shock resistance of all familiar materials.
The most significant change in thermal
100
Thermal shock resistance [%]
shock resistance can be achieved by
changing the material’s thermal
80
conductivity. Thermal shock resistance
60
is defined as:
40
δ=
Strength x thermal conductivity
Coeff. of thermal expansion x Young’s modulus
20
0
Graphite
Carbon
graphite
Boron
carbide
Aluminum
Steel
Silicon Aluminum Thermocarbide
oxide
set
Thermoplast
Combining materials with the same
Coefficient of thermal expansion of various materials
Coefficient of thermal expansion [10-⁶ K-¹]
or similar thermal expansion coefficient
provides good physical compatibility. The
50
coefficient of thermal expansion can be
adjusted through the selection of recipe
40
components.
30
20
10
0
Thermo- Aluminum Stainless
plast
steel
alloys
Thermo- Chromium Aluminum Tungsten
carbide
oxide
cast
set
Silicon
carbide
Graphite
15
fine-grain graphite
Suitable counterface materials
made of SIGRAFINE®
Our special materials made of SIGRAFINE are well-suited to
wet and dry running as well as mixed friction.
We provide our customers with application-specific advice
on materials to help them perfectly match of counterface
materials and thus increase system performance.
In dry running conditions, the surface finish should generally
be of a higher standard than when a liquid film is present.
In the latter case, even hydrodynamically poor media such
as water or gasoline will achieve a compensating effect and
reduce friction.
Hard substances make good mating surfaces for
SIGRAFINE. Examples include:
c Carbon bearings and sliding elements
̤̤ Gray cast iron
̤̤ Steel alloy, non-alloy and nitrided (hard)
̤̤ Hard metal
̤̤ Aluminum oxide
̤̤ Silicon carbide
̤̤ Glass
̤̤ DLC 1)-coated materials
Of limited use are:
̤̤ Steel – alloy and non-alloy (soft)
̤̤ Light metal alloys
̤̤ Chromium-plated materials
̤̤ Nonferrous metals
̤̤ Carbon materials
c Carbon motion control segment
Surface finish of metallic counterfaces
Stress
Rz μm
v < 0.5 m/s
v < 1 m/s
p < 0.1 N/mm2 p < 0.2 N/mm2
≈1
0.5 … 0.8
v < 3 m/s
p < 0.3 N/mm2
< 0.5
1) “Diamond-like carbon,” amorphous carbon resembling diamonds
16
Verdrehsicherung
Verdrehsicherung
Verdrehsicherung
Verdrehsicherun
Design recommendations
We recommend observing the following
guidelines for design and calculation
depending on the specific application.
15°
15°
f x 45°
f x 45°
Our calculation and design recommendations are based on many years of
d1
d2
d1 d2 d3
project and application experience.
We use this experience to help our customers get the best results when using
our special graphites.
r
f
l
b
l
Cylindrical and flanged bearings – design guidelines and calculation
Zylinderla
Zylinderlager, Bundlager
Dry running and mixed running
v (m/s) ≤ 1
projected bearing area
F
I x d1 ≥
0.3 (N/mm2)
v (m/s) ≤ 0.1
projected bearing area
F
I x d1 ≥ 1.5 (N/mm2)
0.3 ... 0.5 %
of shaft diameter at operating temperature (warm clearance)
0.3 ... 0.5 %
of shaft diameter at operating temperature (cold clearance)
if shrunk into a metal housing
0.10 … 0.15
for mixed running
0.15 … 0.25
for dry running
v (m/s) ≤ 20
projected bearing area
I x d1 ≥ F
0.3 (N/mm2)
l ≤ 2 d1
v (m/s) ≤ 15
projected bearing area
I x d1 ≥ F
0.5 (N/mm2)
l ≤ 2 d1
0.1 ... 0.3 %
of shaft diameter at operating temperature (warm clearance)
0.1 ... 0.3 %
of shaft diameter at operating temperature (cold clearance)
if shrunk into a metal housing
Bearing dimensions
Bearing clearance
Coefficient of friction
l ≤ 2 d1
l ≤ 2 d1
Wet running
Bearing dimensions 1) Bearing clearance 1) Coefficient of friction
0.01 ... 0.05
1) Observe the laws of hydrodynamics.
Information for wet and dry running
Tolerances
Surface finish
Outside diameter
IT 6 / IT 7
Bore
IT 7/ IT 8
Outside diameter
Ra = 6.3 μm … 3.2 μm
Bore
Ra = 3.2 μm … 0.8 μm
Bearing design
Do not subject bearing to tension, shear or bending stress
Fitting
Cold fitting, shrink fitting, bonding
Counterface materials (surface finish)
Generally hard materials, e. g. HRC > 50, Rz = 0.5 … 0.8 μm
Design recommendations
17
Axial bearings
The following information also applies to calculating
the face surfaces of cylindrical and flanged bearings
when loaded axially.
d1 = bearing bore (mm)
d2 = bearing outside diameter (mm)
d3 = flange diameter (mm)
s = bearing wall thickness (mm)
l = bearing length, respectively height (mm)
d1 d2
F = radial or axial load (N)
p = spec. radial or axial load (N/mm2)
b = flange thickness (mm)
v = sliding speed (m/s)
f = chamfer (mm)
c Axial bearings in various designs
l
Höhe / Axiallager
Höhe / Axiallager
Scharfe Querschnittüb
Fitting
Method of fitting
Cold press fitting
Shrink fitting
Recommended ISO tolerances
Max. Operating Temperature °C
d₁
d₂
Housing diameter
before F7
after H7 ... H8
s6
H7
about 150 1)
before D8
after E8 ... E9 2)
x8 … z8
H7
about 300 3)
1) For housing materials having a thermal expansion of α > 12 x 10−6/K the maximum operating temperature is correspondingly reduced. Press fitting is conducted with
a stepped fitting pin with a tolerance of h5.
2) We recommend that the bearing bore be finished to size after shrink fitting.
3) For higher temperatures and for housing materials having a thermal expansion of α > 12 x 10−6/K the special tolerances and/or a locking arrangement may be employed –
please inquire about this.
Axial bearings – calculation guidelines and supplementary information
Bearing area A (mm2)
Dry Running/Mixed Running
Wet Running
v (m/s) ≤ 1
v (m/s) ≤ 20
F
0.3 (N/mm2)
F
Flanschstärke A ≥ 1.0 (N/mm2)
Zylinderlager nicht freitragend einbauen
Coefficient of friction
Surface finish
Bearing design
Fitting
Counterface materials
(surface finish)
A ≥
0.1 ... 0.25
0.01 ... 0.05
Bearing surfaces fine-ground to lapped
Bearing surface lapped
Solid or split
Solid or split, lubricating grooves
Cold press fitting, shrink fitting,
screws, nuts and form closure
Cold press fitting, shrink fitting,
screws, nuts and form closure
Generally hard materials, e. g.
HRC > 50
Rz = 0.5 ... 0.8 μm
Generally hard materials, e. g.
HRC > 50
Rz = 0.5 ... 0.8 μm
18
The following implementation
examples illustrate the aforementioned
calculation and design guidelines.
b Cylindrical bearing made of
die-molded carbon
Example: Cylindrical bearing calculation
Example: Axial bearing calculation
Dry running
Wet running
Given values
Sliding speed v = 0.5 m/s
Load F = 150 N
Temperature 60 °C
Given values
Bearing dimensions
150
F
= 500 mm2
= 0.3 0.3
Projected bearing area
l x d1 >
Bearing bore
I
d1 > 2
chosen as
d1 = l
d1 = 500 = 22.36 mm
rounded up
d1 = 23 mm
Bearing length
I = rounded up
l = 22 mm
Bearing outside ø
d2 = d1 + 2s
smin = 0.15 x d1 = 3.45 mm
23 + 2 x 3.45 = 29.9 mm
rounded up
d2 = 30 mm
Bearing dimensions
ø 30/23 x 22 mm
Shaft ø 20 mm
Sliding speed v = 3 m/s
Load F = 500 N
Medium Water
Temperature 30 °C
Bearing dimensions
Bearing bore
d1 = 20 mm (given)
Bearing outside ø d2
By going back and calculating
from the required area
500
F
A = = 500 mm2
= 1.0
1.0
500
= 21.7 mm
23
A =
this results in
d2 =
d2 =
(d22 – d12)
4
Ax4
500 x 4
d2 = 32 mm
Bearing outside ø
Bearing play
Dry running
0.3 ... 0.5 % of shaft ø d
Shaft ø 20 mm
d = 23 h6
Bearing clearance (min.)
0.3 % x 23 = 0.069 mm
(added to nominal bore)
Bearing tolerances
Bearing outside ø
chosen s6 (cold press fitting)
Bearing bore
chosen F7
This results in:
Ø 30 s6/23.069 F7 x 22 mm
chosen as
d2 = 35 mm
Bearing height
l > 0.1d3
chosen as
l = 5 mm
+ d12
+ 202
Design recommendations
19
Over the years, our design recommendations have proven themselves time
and again and help attain the greatest
possible process reliability – by minimizing the risk that the bearings will
break, for instance.
Höhe / Axiallager
Höhe / Axiallager
b Various bearings made of
die-molded carbon
Scharfe Querschnittübergänge
Bearing design
Bearings for dry running should have a smooth bore. If
bearings are running wet, bores should have spiral grooves
or axial grooves according to the application.
Zylinderlager nicht freitragend einbauen
Flanschstärke
Avoid sharp steps in the bore and on the
outside. Break sharp edges!
Cylinder thickness
I ≤ 2d1; s = 0.15 ... 0.2 x d1;
s
d1
smin = 3 mm
l
Scharfe Querschnittübergänge
Höhe / Axiallager
Höhe / Axiallager
Verdrehsicherung
Höhe / Axiallager
Höhe / Axiallager
Höhe
/ Axiallager
Höhe
/ Axiallager
Verdrehsicherung
Verdrehsicherung
Höhe Höhe
/ Axiallager
Höhe Höhe
/ Axiallager
/ Axiallager
/ Axiallager
Scharfe
Querschnittübergänge
Cylindrical bearings should not be fitted to be
Flange thickness should be at least equal to
wall thickness. A transitional angle should be
by the housing or by a special metal bushing
radiused; machine the housing thrust face for
Flanschstärke
Zylinderlager, Bundlager
Zylinderlager nicht freitragend einbauen
Zylinderlager
nicht
freitragend
einbauen
Zylinderlager
nicht nicht
freitragend
einbauen
Zylinderlager
freitragend
einbauen
b
the flange. b ≥ s
Flanschstärke
Flanschstärke
Flanschstärke
Flanschstärke
Height I ≥ 0.1 d2;
Any arrangement such as a check plate or plain
not under 3 mm,
pin to prevent rotation should be provided in
if possible
an unloaded area, not in the bore. Any keyway
should be axial and milled out carefully to avoid
l
erdrehsicherung
Verdrehsicherung
s
self-supporting. They should be fully supported
Flanschstärke
Zylinderlager nicht freitragend einbauen
d2
Scharfe Querschnittübergänge
Scharfe
Querschnittübergänge
Scharfe
Querschnittübergänge
Scharfe
Querschnittübergänge
Höhe / Axiallager
Verdrehsicherung
Höhe / Axiallager
Verdrehsicherung
Zylinderlager, Bundlager
Zylinderlager nicht freitragend einbauen
breakage.
Scharfe Querschnittübergänge
Verdrehsicherung
Verdrehsicherung
Verdrehsicherung
Verdrehsicherung
Verdrehsicherung
Verdrehsicherung
Verdrehsicherung
Verdrehsicherung
Verdrehsicherung
Verdrehsicherung
Verdrehsicherung
Verdrehsicherung
Zylinderlager, Bundlager
Flanschstärke
Zylinderlager, Bundlager
Zylinderlager,
Bundlager
Zylinderlager,
Bundlager
Zylinderlager,
Bundlager
20
SIGRAFLEX®
for static sealing applications
SIGRAFLEX materials made of flexible
expanded graphite are exceptionally well
suited for sealing pumps, flanges and valves.
Thanks to their long-term dura­bility, they
significantly increase plant avail­ability,
process reliability and environmental safety.
Our SIGRAFLEX foils and sheets are also
available in large sizes, such as reinforced
sheets up to 1.5 m (59.1") in width.
We cover all static sealing applications.
Even large boilers with high temperatures
can be sealed securely.
flexible graphite
21
SIGRAFLEX® foils and sheets
made of flexible graphite.
Entirely safe – even under the toughest conditions.
Foils and reinforced sheets made of SIGRAFLEX prove
their value wherever safety and impermeability are called
for, even under extreme conditions such as high pressures
or temperatures.
Our flexible expanded graphite sealing materials have put
their exceptional sealing properties to the test for decades.
Mechanical engineering companies particularly appreciate
their unwaveringly high reliability under a wide array
of operating conditions. The material is resistant to most
chemical media and sets itself apart from other asbestos
substitutes by the long-term stability of its sealing
properties at temperatures up to approx. 550 °C (1022 °F) 1).
c Various products made of SIGRAFLEX graphite foils
Material data for our SIGRAFLEX® reinforced graphite sheets and foils
Typical properties
Units
SIGRAFLEX sheet
ECONOMY
1 – 7
1 – 2
Number of inserts
Metal reinforcement:
stainless steel sheet 316 (L)
mm
0.05
0.05
in
0.002
0.002
Width
Length
Purity
C
B
adhesive-free
bonded
mm
1.0 – 4.0
0.55 – 3.0
0.35 – 1.0
0.2 – 3.05
in
0.04 – 0.16
0.02 – 0.12
0.014 – 0.04
0.008 – 0.12
mm
1000/1500
1000
500/1000
1016 – 1524
in
39.4 – 59.1
39.4
39.4 – 59.1
40.0 – 60.0
mm
1000/1500
1000
in
39.4 – 59.1
39.4
%
≥ 99.85
≥ 98
≥ 98
≥ 98
Bonded/adhesive-free
Thickness
SIGRAFLEX foil
HOCHDRUCK
%
≥ 0.15
≤ 2
≤ 2
≤ 2
g/cm3
1.1
1.0
0.7 – 1.3
0.7 – 1.43
Chloride content
ppm
≤ 10
≤ 25
Sulfur content
ppm
Ash content
Density (graphite)
1) At temperatures above 450 °C (842 °F) please seek our advice.
≤ 25
≤ 50
< 500
< 1000
22
We will find the best solution –
in partnership with you.
The fascinating potential of carbon as a
material excites us and inspires us to develop
optimum solutions in partnership with
our customers.
With our comprehensive material portfolio
and valuable specialist know-how, we can
manufacture tailored products – even for
the most challenging applications.
Consistently high quality, a global presence,
innovative strength, and the extensive
experience of our employees make us a
reliable partner to our customers.
Whatever challenges you face, together we
will find the best solution.
sgl group – the carbon company
23
SGL Group –
The Carbon Company.
A leading global
manufacturer of
carbon-based products.
̤̤ Unique product portfolio
̤̤ Innovative technologies and solutions
̤̤ Production sites close to sales markets
̤̤ Technology & Innovation Center in Germany
with international networks
b Manufacture of a dashboard mold
using a specialty graphite electrode
We have wide-ranging expertise in raw materials,
We use this broad base to offer our customers the
advanced manufacturing processes, and long-
best solutions possible. That’s how we live up our
standing application and engineering know-how.
claim: Broad Base. Best Solutions. This claim is also
We have a comprehensive portfolio of carbon,
upheld by our corporate SGL Excellence philosophy
graphite, and carbon fiber products and our
of continuous improvement.
integrated value chain covers everything from
carbon fibers to composites. With a global sales and
distribution network and modern production sites
in Europe, North America, and Asia, we are close to
our customers throughout the world.
+ More information can be found by visiting:
www.sglgroup.com
sglgroup
sglgroup
Contact
EUROPE/MIDDLE EAST/AFRICA
SGL CARBON GmbH
Drachenburgstrasse 1
53170 Bonn/Germany
mechanical-europe@sglgroup.com
Americas
SGL TECHNIC Inc.
Polycarbon Division
28176 No. Avenue Stanford
CA 91355 Valencia /USA
mechanical-americas@sglgroup.com
Asia/Pacific
SGL CARBON Japan Ltd.
13-5 Midoridaira, Sosa-shi
289-2131 Chiba/Japan
mechanical-asia@sglgroup.com
® registered trademarks of SGL CARBON SE
04 2015/0 1NÄ Printed in Germany
This information is based on our present state of knowledge and is intended to provide general notes on our
products and their uses. It should therefore not be construed as guaranteeing specific properties of the products described or their suitability for a particular application. Any existing industrial property rights must be
observed. The quality of our products is guaranteed under our “General Conditions of Sale”.
Graphite Materials & Systems
SGL CARBON GmbH
Soehnleinstrasse 8 | 65201 Wiesbaden/Germany
www.sglgroup.com/gms