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Gasket sheets

Gasket sheets offered by SEMA do not contain asbestos and are made of expanded graphite, aramid and organic fibers. It is worth to absorb attention to Pyro-Tex CD produced by TRACE with the latest technologies. It is made of graphite with a high degree of upending (about 800) and characterized with unprecedented flexibility and adaptation to the sealed surface.

Name Temperature Application
Pyro-tex do 1000 ° Neutral media, water vapor, oxidizing media
Semagraf do 500 ° All media except with strongly oxidizing
Sema UA-OIL do 250 ° Water, air, gases, oils, fuels, basic chemicals
Sema FA 200 G do 200 ° Water, water vapor, gases, oils
Sema UA do 120 ° Water, air, gases, oils, fuels

More information can be found in the catalogue: SEMA - Sealing professionals.

 

Basic parameters of gasket sheets:

PYRO – TEX gasket sheet is produced by TRACE company according to the latest technology made of graphite with a very high degree of expansion. It is cahracterized with a good fit for uneven surfaces, unprecedented flexibility and requires no installation aids. Available in black with dimensions 1500 mm x 1500 mm, 2000 mm x 2000 mm, 1500 mm x 3000 mm and 2000 mm, and a thickness of 2.54 mm.
Application: All media except strong oxidizing agents.

Pyro-tex

Allowable pressure/temperature: 31 MPa/1000 OC. Simultaneous use of both maximal values is unacceptable!
Maximum continuous working temperature:
- from - 200 °C to 1000 °C - neutral media, - to 650 °C - water vapor,
- to 550 °C - oxidizing media,
- for strong oxidizing media consult!

 

 

 

 

 

 

Physical parameters of a sample with a thickness of 1 mm
Density g/cm3 1,15 DIN 28090 - 2
Creeping % 5
Compressibility % 40 ASTM F 36
Elastic recovery % min 30 ASTM F 36
Tensile strength Mpa 13,79
Compression strength Mpa 240

 

SEMAGRAF gasket sheet is manufactured from high quality expanded graphite of high purity, reinforced with perforated sheet. Available in graphite with dimensions: 1000 mm x 1000 mm or 1500 mm x 1500 mm and a thickness of 1,0/1,5/2,0/2,5/3,0 mm.
Application: All media except strong oxidizing agents.

SemagrafAllowable pressure/temperature: 12 MPa/550 OC. Simultaneous use of both maximal values is unacceptable!
Maximum continuous working temperature:: 500 OC

 

 

 

 

 

 

 

 

Physical parameters of a sample with a thickness of 1 mm
Density g/cm3 1,50 DIN 28090 - 2
Residual stresses % 38
Compressibility % 35 ASTM F 36
Elastic recovery % min 17 ASTM F 36
Tensile strength Mpa 20
Compression strength Mpa -

 

SEMA UA – OIL gasket sheet is manufactured from high quality aramid fibers with NBR rubber as a binder. It is characterized with a good fit to uneven surfaces, very good flexibility and ease of processing. Available in blue with the dimensions: 1000 mm x 1500 mm and 1500 mm x 1500 mm, and thicknesses from 1 to 4 mm by 0.5 mm.
Application: water, air, gases, oils, fuels, basic chemicals.

SEMA UA-OILAllowable pressure/temperature: 10 Mpa/250°C.
Simultaneous use of both maximal values is unacceptable!
Maximum continuous working temperature: 250 °C.

 

 

 

 

 

 

 

 

Physical parameters of a sample with a thickness of 1 mm
Density g/cm3 1,90 DIN 28090 - 2
Thickness increase-liquid B 5h/23 oC % max 5 ASTM F 146
Weight increase- oil olej IRM 903 5h/150 oC % max 4 ASTM F 146
Compressibility % 8 ASTM F 36
Elastic recovery % 55 ASTM F 36
Gas permeability cm/min max 0,5 DIN 3535 - 6/94

 

Sema FA 200 G gasket sheet is a composite of synthetic fibers and heat-resistant mineral fillers, binded with special nitrile elastomer. The material was made using eco-friendly method without the addition of solvents. Unique finishing of the gasket sheet provides excellent anti-adhesive properties. Gaskets cut out from the SEMA FA 200 G are characterized with tightness and a low creep level at increased temperatures.
Gasket sheets meet the requirements according to economic PVRC tightness.
Density: 1.8 - 2.1 g/cm3 - DIN 28 090 - 2
Heat loss: 40% - ASTM F 495
Residual stress: 16h/175 °C - DIN 1952 913
Available in black with dimensions of 1650 x 1600 mm (with a tolerance of +/- 40 mm) and a thicknesses of 0.5/0.8/1.0/1.5/ 2.0/3.0 mm (tolerance +/- 0.1 mm in thickness to 0.8 mm and +/- 10% for other thicknesses).
Application: water, steam, gases, oils, fuels, basic chemicals.

SEMA FA 200 GAllowable pressure/temperature: 8 MPa/360 °C.
Simultaneous use of both maximal values is unacceptable!
Maximum continuous working temperature: 200 °C (180 °C for water vapor).

 

 

 

 

 

 

 

 

Resistance to fluids - thickness increase
Liquids B 5h/150 oC max. % 10 ASTM F 146
ASTM oils - IRM 903 5h/150 oC % 5 ASTM F 146
Compressibility % 5-15 ASTM F 36 - J
Elastic recovery % 50 ASTM F 36 - J
Specific leakage rate mg/s 0,1 DIN 3535 - 6/99

 

SEMA UA gaket sheet is manufactured from the highest quality organic fibers with NBR rubber as a binder. It does not require any assistance in the the assembly and is characterized with a good fit to uneven surfaces and great elasticity. Available in orange with the dimensions: 1000 mm x 1500 mm and 1500 mm x 1500 mm, and thicknesses from 1 to 4 mm by 0.5 mm.

SEMA UAApplication: water, air, gas, oil, fuel.
Allowable pressure/temperature: 3 MPa/180 °C.
Simultaneous use of both maximal values is unacceptable!
Maximum continuous working temperature: 120 °C

 

 

 

 

 

 

 

Resistance to fluids - thickness increase
Density g/cm3 1,65-1,95 DIN 28090 - 2
Thickness increase - liquid B 5h/23 oC % max 10 ASTM F 146
Weight increase - Oil IRM 903 5h/150 oC % max 5 ASTM F 146
Compressibility 10 h % 18 ASTM F 36
Elastic recovery % min 55 ASTM F 36
Gas permeability cm/min max 1,0 DIN 3535 - 6/94

 

Thanks to the WATER JETTM technology we are able to perform even the most precise gaskets of any material. Ready-made gaskets are characterized with clean cut edges, as they are cut with an unprecedented precision. Cutting profiles from steel, aluminum, rubber and plastics, in turn, is possible through a technology that provides fast execution of complex three-dimensional details.