The design principle of the KLINGERmaxiflex Spiral-Wound Gasket

Spiral Wound Gasket have the ability to recover under the action of fluctuating loads caused by process fluid pressure and temperature changes, flange face temperature variations, flange rotation, bolt stress relaxation and creep.

The gasket sealing element consists of a pre formed metallic winding strip with layers of a softer, more compressible sealing material which, during compression, is densified and flows to fill imperfection in the flange surfaces when the gasket is seated. The metal strip holds the filler giving the gasket mechanical (resistance) and resilience.

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Inner and outer rings can be fitted which are used for centralizing the gaskets on the face of the flange and protecting the inner windings against erosion. They also act as a compression stop. Maxiflex Spiral Wound gaskets can be manufactured using a range of filler materials according to different service condition.

Maxiflex gaskets can be manufactured to meet all of the international standards such as ASME B16.20, DIN and customer specific requirements.

Flange Surface Finish

Maxiflex gaskets are capable of giving an excellent seal over a wide range of flange surface finishes, but as a general guide we suggest the following:

Duty Roughness
General 3.2-6 3µm 125-250µ”
Critical 3 2µm 125µ”
Vacuum 2.0µm 80µ”


Winding Material Maximum temperature
Carbon steel 500°C
304 Stainless steel 650°C
316L Stainless steel 800°C
Duplex UN  S 31803 800°C
347 Stainless steel 870°C
321 Stainless steel 870°C
Monel 400 800°C
Nickel 200 600°C
Titanium Gr2 500°C
Titanium Gr7 500°C
Hastelloy B-2/B-3 700°C
Hastelloy C-276 700°C
Inconel 600 1000°C
Inconel 625 1000°C
Inconel X 750 1000°C
Incoloy 825 600°C
Zirconium 500°C
Super Duplex 600°C
Alloy 20 600°C
Other grades of steel available on request.


Filler Material Maximum and minimum temperature
Graphite -200 to 500°C
PTFE -196 TO 260°C
Mica 1000°C
Mica & Graphite 900°C
Ceramic 1200°C
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