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Dichtomatik is offering O-ring seals from Dupont Performance Polymers that have been developed for use in the harsh environments of the oil and gas industries.

The Kalrez 0090 perfluoroelastomer O-ring seal products provide resistance to rapid gas decompression (RGD) and chemical resistance.

As an authorised distributor of these products, Dichtomatik can also offer full technical support for customers experiencing sealing problems involving extreme temperature or pressure conditions combined with aggressive fluids.

Dupont can provide sealing solutions for both downhole and surface-level equipment such as packers, pumps and valves, as well as many general chemical handling and processing applications.

Kalrez 0090 has achieved the highest ‘0000’ rating in the Norsok M-710 Rev 2 tests recently conducted in the UK by the independent Materials Engineering Research Laboratory (MERL).

It was established that Kalrez 0090 has a strong resistance to RGD, with no cracks or blisters having developed on the O-ring sections throughout the test cycling.

In addition to finished O-rings, Kalrez 0090 can be supplied in the form of flat washers, discs, cords or special mouldings for all applications that require the highest ‘0000’ rating for RGD resistance.

Additional properties include high resistance to chemical attack from more than 1,800 chemicals and solvents, especially sour multi-phase fluids containing H2S (as shown by the external Norsok M-710 Rev 2 Sour Fluid ageing resistance certification provided by MERL-UK).

High-temperature resistance up to 250C (482F) is maintained with high levels of elasticity and recovery even after long-term exposure.

High modulus at low elongation properties also ensure extrusion resistance.

The Norsok M-710 testing conditions included 100 per cent CO2 gas composition, with 100C temperature, 15MPa pressure and a decompression rate of 12MPa/min.

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