WE HAVE THE GRAPHITE SOLUTION FOR YOUR APPLICATION
APPLICATIONS
- Vacuum Fornace insulation
- Inert Gas Fornace Insulation
- Inert Gas Atmosphere Equipment Insulation
- Reaction Vessel Linings
- Bearings
- Segmented Seals
- Piston and Guide Rings
- Mechanical Seals
- Steam Nozzles
- Water Turbine Gland Seals
- Packing Rings
- Contactless Seals
- Vanes
- Sealing Strips
- Stripping components
- Hollow and Container Glass Manufacture
- Flat Glass Production
- Heat Exchangers
- Refractory Systems
INDUSTRIES
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Aerospace Industry
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Aluminium Industry
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Automotive and Mechanical
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Defense Technology
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Electronic
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Glass and Ceramic Industry
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High-Temperature Applications
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Mechanical Engineering Industry
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Metallurgical Industry
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Non-Ferrous Metal Industry
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Recreational Products


CARBON PRODUCTS FOR APPARATUS AND
REACTION VESSEL LININGS IN THE CHEMICAL INDUSTRY

STANDARD BRICKS

SHAPES
TYGRAF-T: Standard grade
TYGRAF-TX: Pitch impregnated
TYGRAF-TXh: Impregnated with phenol formaldehyde resin
ceramic linings.
should be given to the maximum withstandable temperatures given below:
>350 °C for non-impregnated bricks in oxygen-free atmospheres (T, tX)
180 °C for material impregnated with phenolformaldehyde resin (TXH).
TECHNICAL DATA FOR CECOLIT GRADES OF CARBON BRICKS

a. Machined pieces e.g. tubes are manufactured in accordance with: DIN 7168 rough.
b. For special dimensions, e.g. hand moulded bricks no tolerances can be quoted and have to be agreed upon.
Besides the TYGRAF-T, TX and TXH grades, other grades of carbon and graphite in the form of beams or tubes etc., for special chemical construction applications can be supplied. The technical data of these other grades are available on request. On principle, any size and shape can be produced. Moulding methods can be block pressing, extrusion pressing, vibrating and ramming. Hand moulded bricks, both complicated and simple in form are made in the TYGRAF-T, TX and TXH grades. It is recommended to contact us when projects in this field are being planned.
Special sizes and bricks with convex radii can also be made in suitable quantities. To allow us to check the feasibility of manufacture, both quantity requirements and dimensioned drawings should be supplied.
TYGRAF-T carbon bricks are extremely insensitive to all acids, provided they have no strongly oxidising properties. TYGRAF materials also show the same excellent resistance to attack by highest concentrations of alkaline solutions. Alternating acid and alkali conditions are withstood by this carbon material and they are also unaffected by corrosive salt solutions. TYGRAF-T carbon brick linings are thus particularly suitable for chemical processes which involve various temperature and concentration cycles.
GRAPHITE GRADES




BEARING AND SEALING COMPONENTS
FOR MECHANICAL ENGINEERING
applications. Their use is recommended where the following conditions prevail:
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the use of hydro carbon lubricants is prevented by high operating temperatures
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oil or other lubricating contamination must be restricted
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chemical attack prohibits the use of other materials
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minimum servicing requirement
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dry running and high pressure demands a mechanically sound material with sufficient selflubricating capability, good thermal conductivity and low coefficient of expansion
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bearings are situated vertically or at an angle in the machine thus making lubricant retention difficult
GENERAL APPLICATION INFORMATION
PHYSICAL AND MECHANICAL PROPERTIES
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good dimensional stability (low thermal coefficient of expansion)
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good heat conductivity
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good corrosive resistance
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good temperature resistance
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good self-lubrication
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good frictional characteristics
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good machining characteristics
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low weight
OPERATING TEMPERATURE
CHEMICAL RESISTANCE
FRICTIONAL BEHAVIOUR
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dry friction 0.10… 0.30
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mixed friction 0.05 …0.10hydraulic friction 0.01 … 0.05
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running in
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specific pressure
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running speed

CONSTRUCTION INFORMATION
COUNTER FACE MATERIALS
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grey cast iron
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plain steel
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alloyed steel (chrome steel)
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hard metal
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ceramic
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glass
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nonferrous heavy metal
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chrome nickel steel
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chromium plate materials
- aluminium and its alloys
SURFACE QUALITY OF THE COUNTER FACE MATERIALS
The surface quality of the counter face materials has an important influence on the durability of carbon and graphite. Counter face surfaces with a maximum surface roughness of Sr <1 μm are recommended. For high pressure lapped and superfinished counter faces with a maximum surface roughness of Sr<0.5 μm are necessary.
GENERAL GUIDELINES
FOR TREATMENT OF CARBON AND GRAPHITE

CUTTING RATES
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High-speed steel and bimetal-cutting band sawblades 3 teeth per inch
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Cutting speed: 100 m/min
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Silicon carbide wheels, grain 36…60 μm
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Cutting speed: : 20…30 m/s
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Diamand cutting wheels, grain 100…200μm,
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Galvanic and bronze bonding
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Cutting speed: 30…50 m/s

TYGRAF BEARINGS
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At high and low temperatures, where usual lubricants cannot be used.
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In media with unfavourable lubricating properties (aqueous solutions, gasoline, liquid gases, water).
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In corrosive media which prohibit the use of bearings made of other materials.
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When the finished product must not be contaminated with liquid lubricants (food, drugs).
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When dry running is preferable to the use of liquid lubricants because of surrounding conditions
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Bearings with alternating wet/dry running.
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Concealed machine bearings which cannot be maintained.
