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Graphite Sigraflex ® HD products

Sigraflex ® HD is a high-pressure graphite sheet with multiple inlays of 0,05 mm thick stainless steel foil. The material is often applied as flange seals for pipes and equipment. We always have an ample stock of this sheeting material and produce amongst others custom-made flange gaskets. In addition to the standard HD (Hochdruck) quality, we also produce gaskets from the Email quality. This material is specially developed for use in PTFE envelope gaskets.

Graphite Sigraflex ® HD products

Ridderflex supplies universal graphite gaskets according to DIN, ASA and ANSI sizes. We can also produce the graphite gaskets according to your specifications. This can be based on a drawing or model.

We supply the following products:

(Flange) gasketInlay as a part of PTFE envelope gasket *

* We only produce this product in the special quality Email

Properties of Sigraflex ®

Sigraflex ® HD graphite sheet is very good pressure resistant and has a high temperature resistance. The material is also non-sticking. These properties, along with the good chemical resistance, make the material perfectly suitable for application in steam systems in amongst others the process industry and the (petro)chemical industry.

Sigraflex ® Email is specially developed for use in PTFE envelope gaskets. A PTFE envelope gasket is a composed gasket. It often consists of an envelope of PTFE with two inlays of graphite (Email), with a corrugated 316SS ring in between. The envelope gasket is mainly applied as a flange seal in applications where a high chemical resistance and high pressure resistance is required.

We are happy to advise you. Please contact our sales department.

Related to Sigraflex ® graphite HD

  • Die cutting

    Die cutting

    With our die cutting machines we manufacture products such as die cut gaskets, die cut rings and die cut sealing products to the right dimensions.

  • PTFE envelope gasket

    PTFE envelope gasket

    Different types according to standard sizes for flanges. Our specialists are happy to help you by choosing the right inlay material.


ISO including co-engineering

Ridderflex complies with international quality management requirements. We are now also certified for co-engineering – our strength – . Read more


Any questions about products or make an enquiry? Simply call us or send us an e-mail. +31 (0) 180 46 34 71