Ball valves: Improved sealing reliability to meet needs in the extreme cold temperatures found in compressing and liquefying natural gas
THORNTON CLEVELEYS, UK - (April 21, 2020) - Belgium-based Advanced Engineering Valves (AEV), an Emerson company and industry leader for cryogenic and severe service ball valves, has selected a Victrex high performance cryogenic PEEK polymer to help its customers operate applications more efficiently and safely. The company´s 2XC* C-ball valve products, based upon double eccentric and cavity-free technology, are designed to meet the most stringent demands, potentially reducing the cost of ownership due to their high reliability (zero maintenance) in cryogenic service.
The cryogenic VICTREX CT™ 100 polymer was specifically developed by Victrex for insert applications. After successfully passing Design Validation Testing (DVT) at AEV, the polymer is now used in the company´s class 900 ball valves ranging from ½ through to 18 inches. It is specified for a temperature range of -196°C to +150°C (-321°F to +302°F) and offers structural strength at elevated temperature without compromising low temperature performance of cryogenic PEEK compared to incumbent materials.
The DVT at AEV was carried out according to Shell´s “Material and Equipment Standards and Code” (MESC), which is widely accepted in the oil and gas industry as a key test protocol and a prerequisite for industry acceptance.
“Our valves successfully passed all aspects of the cryogenic test using the VICTREX CT 100 polymer. Meeting the requirements of the Shell MESC test is in fact an important achievement that opens up new potential uses with industry leading OEMs," commented Francis Carpio, Operational Director at AEV. Victrex´s thermoplastic polymers are associated with high temperature performance, high chemical resistance and a unique range of mechanical properties.
“Many sealing applications in cryogenic temperature ranges have typically been made with fluoropolymers. However, our polymer products such as the VICTREX CT series provide a unique range of properties over a broader temperature range from +200°C to -196°C (+392°F to -321°F) which fluoropolymers cannot meet,” said James Simmonite, Director Energy at Victrex. In this temperature range, chemical resistance is still important, but other aspects such as creep resistance, low temperature toughness and tribological performance, and thermal properties such as conductivity and expansion, are the most important to applications such as valve seats and packings.
Sealing: Reliability and efficiency in harsh conditions
Victrex, a world leader in high performance PEEK polymer solutions, understands the need for reliability and efficiency in harsh conditions. The VICTREX CT polymer series, for example, exhibits improved sealing over a wider range of temperatures, compared to used materials such as PCTFE. It does so at low temperatures on account of its greater ductility, and at high temperatures due to its superior creep resistance. VICTREX CT polymers have also been shown to maintain better dimensional stability, with a lower coefficient of thermal expansion than incumbent materials. The higher thermal conductivity of the PEEK material enables a fast response to temperature changes, ensuring the material stays engaged with the counter surface at all times.
Note: If you would like more information about this story, or if you would like to speak with a Victrex spokesperson, please contact Kris Jommersbach at email@example.com
About Advance Engineering Valves
Advanced Engineering Valves (AEV) is a leading manufacturer of innovative valve technology that helps LNG, Oil & Gas, Chemical and Petrochemical customers operate more efficiently and safely. The company´s products are backed by decades of engineering expertise and hands-on experience solving critical process isolation challenges, in some of the most extreme temperature and severe service applications. In December 2018, Emerson (NYSE: EMR), headquartered in St. Louis, Missouri (USA) acquired Advanced Engineering Valves to create a global isolation valve leader for cryogenic and severe service applications.
Find out more at www.ae-valves.com/about-us.