Product category:
Process and OEM Valves
News Release from: Severn Glocon | Subject: Series 5000
Edited by the Engineeringtalk Editorial
Team on 25 November 2003
Modified valves take control in hydrogen
plant
Specially developed Severn Glocon globe valves will be used in a hydrogen gas production plant in Italy.
Specially developed Severn Glocon globe valves have been ordered for a hydrogen gas production plant in Italy Known as "switching valves", the valves are used in the PSA (pressure swing adsorption) process that removes impurities from the hydrogen-rich gas manufactured in steam methane reforming plant
This article was originally published on Engineeringtalk on 18 Jun 2001 at 8.00am (UK)
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The specialised plant is designed and manufactured by Axsia Howmar, which has ordered 25 of the valves for equipment to be installed at a refinery in Italy.
Ian Pattenden, Axsia Howmar Project Manager, explains: "Switching valves are used to divert the flow of Syngas - an impure gas containing approximately 75% hydrogen - between specially designed adsorber vessels under PLC control.
The process can produce up to 99.999% pure hydrogen product with recoveries as high as 90%.
The adsorption process operates in a cyclic manner and demands very rapid stroke times from the valves, with bubble-tight shutoff for flow in both directions.
The globe valve configuration is inherently suitable for this type of application, as long as the design is robust and reliable enough to cope with the critical and extremely arduous cyclic nature of the application over a long term operating period".
Two years ago, Severn Glocon began to work on modifications to the Series 5000 general service control valve design, specifically for this application.
Modifications to the valve seat, the pneumatic actuator yoke and linkage between actuator and valve were introduced, combined with special attention to the selection of all component materials.
The resulting design was then successfully trialled in the USA.
The Axsia Howmar order is its first European project to adopt these valves, which are being supplied in 3 and 6in sizes, pressure rated at ANSI Class 300.
The project, which is being built by leading European contractor, will see hydrogen produced by the Axsia Howmar Hydrogen Generation Plant at the rate of 7000Nm3/h when commissioned.
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