Specification of Gasket Merkel Grafiflex Per pcs
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)