SIGRAFLEX ®Graphite Sheets & Gaskets

SIGRAFLEX® Graphite Sheets & Gaskets

SIGRAFLEX® UNIVERSAL PRO & SELECT, HOCHDRUCK, HOCHDRUCK PRO, MF
WS 3862 I WS 3865 I WS 3885 I WS 3888 I WS 3875 DB I WS 3830IB I WS 3870 DB
IDT-graphite sheets and seals consist of high quality SIGRAFLEX® material. For the production of SIGRAFLEX® products, flaked natural graphite is used which has a good crystalline structure. The high purity of SIGRAFLEX® graphite gasket is determined by the raw materials and ensured by the quality of mechanical, chemical and thermal cleaning processes. We are a most trusted name among the topmost graphite gasket manufacturers and suppliers in India. Our Graphite sheets are manufactured without reinforcement, metal-reinforced and/or waterproofing whilst the metal reinforcement can be done with sheet reinforcement or smooth stainless steel foils. The graphite sheets have higher strength, gas tightness, scratch resistance and non-adhering surfaces thanks to the special waterproofing.

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Low permeability towards gases and liquids
Flexible, soft, good adaptability
Very good media resistance, specifically against corrosive substances and chemicals [resistance chart available upon request]
Does not present a health risk and is environmentally friendly
Temperature range from -200°C to approx. 550°C [upward to 450°C please consult the manufacturer]; special construction [FD33] up to 600°C
Ageing resistant, no embrittlement, since no binders or elastomer matrix
Long-term stable compression and recovery characteristics
Good temperature change resistance and constant diffusion rate
Complies with TA Luft 2002 [VDI 2440/2200] leakage requirements
No cold and warm flow until maximum permissible surface pressure
High pressure stability
The tightness of the flange connection remains intact in the event of a fire [Fire Safe Test]

Non-metallic gaskets for pipeline flanges, device and container flanges, pumps and valves
Wide range of applications, primarily in the chemical and petro¬chemical industry, natural gas industry, power stations and thermal oil and heating plants
Also used in food and pharmaceutical applications depending on the gasket construction
Used if there are increased requirements such as for blow-out resistance [technical tightness] as per TRBS 2152 T.2
Possible for use for oxygen, ethylene and propylene oxide applications [BAM-test report]
Can be used for very high operating pressures and/or temperatures
No special requirements for flange sealing surfaces
Non-metallic layer for corrugated metal and Kammprofile serrated gaskets as well as insert for spiral gaskets
For designs with inner eyelets, used for increased requirements for cleanliness and blow-out resistance [technical tightness]
Possible for use for oxygen, ethylene and propylene oxide applications [BAM-test report]

Sigraflex Graphite Sheets And Gasket Product range

Available dimensions: 1000 x 1000mm and 1500 x 1500mm [standard format]
Available thicknesses: 1.0; 1.5; 2.0; 3.0, 4.0mm

SIGRAFLEX®-foil/gasket sheet
SIGRAFLEX®-tape
SIGRAFLEX®-foil pressed into packing rings

Dimensions: as per DIN EN 1514-1 and DIN EN 12560-1 or ASME B 16.21 as well as non-standard sizes, made from:

SIGRAFLEX® UNIVERSAL [WS 3862]
SIGRAFLEX® UNIVERSALPRO [WS 3865]
SIGRAFLEX® SELECT [WS 3830] *
SIGRAFLEX® HOCHDRUCK [WS 3885]
SIGRAFLEX® HOCHDRUCKPRO [ WS 3888]
SIGRAFLEX® MF [WS 3870]*
SIGRAFLEX® Special type [WS 3875]*

Gaskets made from above mentioned materials are also available with inner eyelets and/or outer eyelets

Gaskets made from above mentioned materials are also available with inner eyelets and/or outer eyelets. [*] Designs are only available with flanges.

Additionally: IDT Profile Overview I FD Series

Additional designs
• Envelope gaskets made from TFM^TM with SIGRAFLEX^® EMAIL [WS 3825] insert
• Kammprofile serrated/corrugated metal gaskets with graphite layers made from SIGRAFLEX^® foils
• Spiral wound gaskets with SIGRAFLEX^® graphite filler

Optimised technology clean environment

IDT only processes graphite qualities by SGL Group. SIGRAFLEX^® UNIVERSAL and SIGRAFLEX^® HOCHDRUCK are among the materials which have been established in the market for years. They are considered state-of-the-art and have proven their value in all industrial applications.

With the commencement of the increased requirements of TA Luft in 2002, it had become necessary to develop new production technologies and product variations to comply with the required emission reductions. The product ranges SIGRAFLEX^® PRO, SIGRAFLEX^® SELECT and SIGRAFLEX^® MF were introduced to meet these requirements and were -mostly with eyelet design – standardised by plant operators.

Based on this environmental and safety relevant background as well as in harmony with applicable environmental protection regulations, various IDT-sealing systems were optimised with regards to their design and production, so that they complied both with the TA Luft requirements as well as the calculatory strength and tightness certificate following DIN EN 1591-1 which has been required since the inception of VDI 2290 in 2012.

The optimised sealing systems are labelled with the IDT environmental label for Low Emission [LE]. Subsequent calculations of pipe classes following DIN EN 1591-1 were carried out on the basis of the VCI-guideline for the assembly of flange connections in process plants and have shown that the leakage rate of 10^-2 mg/[s*m] could be adhered to with all LE versions; in parts even with a bolt quality of 5.6.

In addition to increased leakage requirements and due to higher process temperatures in plants, it also has become necessary to produce the graphite with an increased oxidation protection and to equip it with an oxidation inhibitor which is applied directly to the structure of the graphite foil. SIGRAFLEX® APX-foil sets the standard for these applications and has a significantly improved temperature resistance in comparison to standard graphite qualities.

SIGRAFLEX ®Graphite Sheets & Gaskets