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Victrex launches new cryogenics polymer for energy industry

Photo by Victrex Valve seat insert made from VICTREX CT? 200

Victrex is launching a new high-performance polyether ether ketone (PEEK) polymer for sealing solutions this year at the Valve World event, held 27-29 Nov in Dusseldorf, Germany.

The new material, Victrex CT 200, has been developed for cryogenic applications and offers an alternative to polymers such as polychlorotrifluoroethylene (PCTFE).

The 200-grade series, said the UK PEEK supplier, shows improved sealing over a wide range of temperatures compared to PCTFE, and can be used in cases where gases such as LNG are stored and transported at low temperatures of -150°C to -200°C.

The material’s high performance at low temperatures is linked to its greater ductility, and at high temperatures to its “superior" creep resistance.

The polymer, according to Victrex, maintains better dimensional stability, with a lower coefficient of thermal expansion than existing materials in the market.

It also offers high thermal conductivity, which enables a fast response to temperature changes, ensuring the material is engaged with the counter-surface at all times.

In addition, laboratory testing has indicated that the material may require less torque to actuate since it has a lower static and dynamic coefficient of friction compared to PCTFE.

This results in less wear, enhanced performance and a potential for cost savings.

According to James Simmonite, director energy at Victrex, the new material compares favourably to its predecessor Victrex CT 100, especially as regards its higher strength and improved ability to withstand aggressive chemicals, in addition to its featuring a lower coefficient of friction.

“All of these characteristics put Victrex CT 200 ahead of materials such as PCTFE for cryogenic applications involving gases such as LNG and nitrogen,” he said.

Set to be commercially available in December, the material can be injection moulded, compression moulded and extruded.

Victrex expects the new product to be of interest to valve manufacturers, processors, and operators in the oil & gas industry.

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