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Gasket Merkel Grafiflex / /
Gasket Merkel Grafiflex / /
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Last Updated
30 Jul 2021
Minimum Order
1 Unit

Specification of Gasket Merkel Grafiflex / /

Merkel Grafiflex

Packing rings for high temperature valve applications

Merkel Grafiflex is characterized by a high level of chemical resistance and thermal stability as well as excellent sealing

effect and constant elasticity. Regardless of temperature cycle

this material is not subject to cold flow, shrinkage or aging.

Merkel Grafiflex fulfills the purity requirements for seals in nuclear

power station valves (content of soluble chlorides <20 ppm).

The packing is approved for use in the food processing industries

(version 6501 additionally for drinking water, respectively KTW

compliant).

Preformed Merkel Grafiflex rings are supplied in densities

between 1.4 and 1.85 g/cm³.

Additionally they are available as:

„ Merkel Grafiflex Cover Lid seals (see page 15)

„ Merkel Grafiflex 6501 with carbon content 98% or 99,85%

„ Merkel Grafiflex 6561 with carbon content 98% and

PTFE coating

„ Merkel Grafiflex 6509 with carbon content 99,85% and

corrosion inhibitor

Merkel Grafiflex tape is also available as foil material with a

unique surface pattern for quick repair service.

Merkel Grafiflex material is approved for use in food, drinking

water and oxygen applications.

For re-conditioned valves we recommend the combined use of

Merkel Grafiflex and Merkel Carbosteam 6550 anti-extrusion

rings.

Application

Valves

Media

Hot water and feed water, steam, heat transfer oils, hydrocarbons and many other media

Exceptions: strongly oxidising media

BAM approved for gaseous oxygen (45 MPa up to 60°C;

22 MPa up to 200°C)

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