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Klinger® Gaskets > Gasket materials / PTFE Products > KLINGER-top-graph > KLINGER-top-graph-2008



  Gasket materials / PTFE Products
KLINGER-top-graph-2008
 
The really flexible graphite sealing material now supplied wire reinforced. It combines
"high load bearing capacity" and high sealability with improved blow-out resistance.
KLINGER Topgraph 2008 is ideally suited for use with steam up to 300'C and many high
temperature applications up to 500'C.
 
Basis
A sealing material based on graphite and synthetic fibres with a wire insert that provides this material with totally new, previously unachievable properties.
 
Properties
This material is based on the proven formulation for Klinger Topgraph 2000
which combines the handling advantages of fibre reinforced gaskets with the
performance advantages of graphite to give a truly flexible graphite sealing
solution. The addition of the wire insert significantly increases tensile strength
and will therefore be the preferred solution for many users where pulsating
pressure loads exist. Topgraph 2008 demonstrates improved
storage, handling and installation characteristics when compared to
exfoliated graphite products. The material has a high loadbearing
capacity and is suitable for use with steam to 300'C and many
other applications up to 500'C.
 
The many and varied demands made on gaskets
The successful operation of a gasket depends upon a multiplicity of factors.
Many who use static gaskets believe that the values quoted for maximum
admissible temperature and maximum operating pressure are inherent properties or characteristics of
gaskets and gasket materials. The maximum temperatures and
pressures at which gaskets may be used are influenced by a large
number of factors. Therefore a definite statement of
these values for gasket material is not possible.
 
So why does Klinger provide pT diagrams?
For the reasons given the pT diagram
is not infallible: it serves as a rough
guide for the end user who often has
only the operating temperatures and
pressures to go on.
Additional stresses such as
greatly fluctuating load may significantly affect whether a gasket is
suitable for the application.
Resistance to media must be
taken into account in every case.
 
The fields of decision
(1) If your operating temperatures
and pressures fall within this field,
a technical examination is normally
unnecessary.
(2) If your operating temperatures
and pressures are within this field,
a technical examination is
recommended.
(3) If your operating temperatures
and pressures are within this “open“
field, a technical examination is
always necessary.
 
Klinger cold/hot compression
In the test method acc. to DIN 52913 and BS 7531, the surface load
is kept constant during the complete test so that the gasket is exposed to
much tougher conditions. The thickness decrease at an
ambient temperature of 23°C and at heating up to 300°C is measured.
The indicated thickness decrease at 300°C refers to the thickness obtained
after loading at 23°C.
 
Typical values for 1.5 mm thickness KLINGERtop-graph-2008
Compressibility ASTM F 36 A % 10
Recovery ASTM F 36 A min % 60
Stress relaxation DIN 52913 50 MPa, 16 h/300°C MPa 32
Klinger cold/hot compression 50 MPa thickness decrease ambient % 10
thickness decrease hot 300°C % 10
Immersion oil JRM 903: 5h/150°C thickness change % 5
weight change % 10
Immersion fuel B: 5h/23°C thickness change % 7
weight change % 10
Immersion water: 5h/100°C thickness change % 5
weight change % 5
Soluble cloride content chlorides (soluble) ppm <50
Tightness according to DIN 3535/6 ml/min 1,0
Density g/cm3 2,10
Thickness mm 1,5
 
The dimensions of the standard sheets
Sizes:
1,500 mm x 2,000mm
Thicknesses:
1.5 mm, 3.0 mm, other thicknesses on request.
Tolerances:
thickness ± 10%,
lenght ± 50 mm,
width ± 50 mm
 
Surfaces
The surface finish of the material is such that it has an extremely low adhesion to the flange faces.
 
Function and durability
The performance and life of KLINGER gaskets depend in large measure on
proper storage and fitting, factors beyond the manufactor’s control. We
can, however, vouch for the excellent quality of our products.
With this in mind, please also observe our installation instructions.
 
Tests and approvals BS 7531 grade X.