InsoLion® flange isolation gasket

Gaskets & Sheet Jointings

InsoLion® flange isolation gasket


Much more than just a gasket, InsoLion® is a complete flange isolation kit.

Using the best possible materials, optimising component design and careful consideration of the positioning of the sealing element, InsoLion allows a single gasket design to be specified for plant-wide use across the majority of flange types, saving on inventory costs and simplifying maintenance regimes.

The InsoLion gasket consists of a Phynox® spring-energised U-shaped seal in modified PTFE chosen for its advanced mechanical properties and improved resistance to permeation. This is bonded to a high strength G11 glass reinforced epoxy and 316L stainless steel composite core.

Improved sealing
InsoLion incorporates a U-shaped PTFE sealing element that has been optimised using finite element analysis (FEA) and is energised by a Phynox spring. This combination provides almost unlimited media compatibility for critical service applications.

Improved isolation
InsoLion is a complete flange isolation kit including bolt sleeves and isolation washers. The gasket faces, bolt sleeves and washers are supplied in superior G11 glass reinforced epoxy (GRE) as standard and will offer extremely high levels of electrical isolation even at elevated temperatures.

Shell MESC standard
Specifically designed from the outset to meet the industry’s most stringent requirements, pre-launch testing has shown that InsoLion exceeds the requirements of both Shell MESC SPE 85/300 3.3.2 Class A (HS) for fugitive emissions and Shell MESC SPE 85/300 3.3.5 requirements under the Hot Operational Tightness Test (HOTT).

InsoLion® performance characteristics
• Max operating temperature – Continuous 150°C (302°F), intermittent 200°C (392°F)
• Media compatibility with Natural Gas, Oils and other hydrocarbon media
• Suitable for corrosive applications

How supplied
Each InsoLion gasket is supplied as a kit, complete with the requisite number of bolt isolation sleeves and washers also
manufactured in G11 GRE as standard specification.
InsoLion can be supplied in sizes from 1/2” through to 24” diameter to match the majority of flange specifications including
Custom dimensions and sizing options are available upon request.
The design of the InsoLion gasket and location of the spring-energised sealing element ensures that the product will seal all
major flange types including RTJ (ring type joint), raised face and mismatched flanges.

Typical applications
• Flange insulation and electrical isolation in conjunction with cathodic protection.
• Insulation between dissimilar metals/flanges to prevent galvanic corrosion.
• Wellhead isolation from inter-connected pipes and flow lines.
• Mating mismatched ring-joint to raised-face flanges

InsoLion® flange isolation gasket

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