Product category:
Valves and manifolds
News Release from: Tyco Flow Controls | Subject: Sempell
Edited by the Processingtalk Editorial
Team on 05 June 2006
Nuclear valve showcases project
expertise for Tyco
The display of a highly specialised Sempell nuclear valve on the Tyco Flow Control stand at Achema 2006 showcased the brand's enormous technical expertise in this product sector
The display of a highly specialised Sempell nuclear valve on the Tyco Flow Control stand at Achema 2006 showcased the brand's enormous technical expertise in this product sector, as well as the Tyco commitment to providing complete project solutions backed by decades of experience The valve is one of five produced for a nuclear power station in Scandinavia as part of a three year project
This article was originally published on Processingtalk on 25 Mar 2004 at 8.00am (UK)
Related stories
High performance globe valve for isolation duties
A high performance globe valve designed for isolation duties on medium to high pressure liquid, steam and gas pipelines in the power, chemical and processing industries
Sempell valves on RWE high efficiency power plants
Sempell AG, a part of Tyco Flow Control, has been awarded a USD22M contract from RWE for high pressure steam valves on their lignite power plant projects
Assembly of the first valve on site is scheduled for later this month.
Sempell engineers will assist the customer with commissioning of the valves in person.
The type of valve displayed has its application in the emergency cooling system at the nuclear plant and is based on a wedge gate design with highly specialised internals.
Further reading
Safe sampling solution
The problem of obtaining process samples from reactor vessels without requiring process shutdown has been solved by the PV vessel sampling device from Neotecha, giving more accurate results
Tyco - an AVID provider of the latest technology
A comprehensive integrated system of control accessories designed for hazardous area or general process applications, is provided by the state-of-the-art AVID range from Tyco Valves and Controls
High quality reliable economical butterfly valves
Tyco Valves and Controls has introduced a series of new, high quality, reliable and economical butterfly valves for general purpose industrial applications, the PremiSeal range
The project was carried out in close cooperation and with regular contact with the client to achieve precise design features.
The prototype and all production valves were tested at the highly-specialised Sempell laboratory facility in Korschenbroich in the presence of the client and the relevant authorities, under conditions of 280C and 220 bar saturated water.
The valve design operates according to the depressurisation principle with system media, which permits a short actuating time to close the valve.
This improves significantly on the performance and reliability of the pneumatic-type actuator which was previously used in the application and provided lower reserve forces.
The valve is installed in a horizontal pipe with vertical stem position.
Due to its functional requirements, the valve is kept permanently in its open position by a mechanical coupling under pressureless system conditions.
To manipulate the valve, a small pneumatic actuator is fitted; the valve position can then be changed without system pressure.
This is only applied for operational purposes.
All safety functions will operate with the system media only, that means to make a quick shut down, system media, which is saturated water, is mandatory.
To make a quick isolation of 3 - 5 sec time one pilot valve is available with a pneumatic actuator.
An identical valve is fitted to re-open the valve, while the other pilot valve is moving back into its initial position.
Important design features of the design are Co-free hard-facing on all sliding surfaces seats and guides.
The special wedge design was qualified in 1996 in the GAP of former Siemens in Karlstein.
That test valve was installed in the critical horizontal pipe and stem position.
A full pipe break was simulated by two quick opening valves.
The required seat tightness after this blow-down-test was witnessed by the client and authorities.
Sempell has been qualified since the early 1960s for the nuclear industry and is today one of the leading European suppliers for critical valves in nuclear power applications.
Since its inception Sempell has been qualified according to German KTA rules for nuclear valves and since 2003 according to ASME Section III - N-stamp.
Tyco Flow Control products are used widely throughout many demanding markets, but the company specialises in providing flow control solutions for the complete steam generation cycle.
The superior performance standards of the range are reinforced by consistently high levels of service and expertise available at a local level.
With comprehensive sales and service operations, dedicated product inventory and experienced personnel in all major market areas the company prides itself in providing fast and efficient support right around the globe.
In the power industry, as in other sectors, Tyco Valves and Controls includes some of valve industry's biggest and most respected brand names including Dewrance, Sempell, Narvik, Intervalve, Crosby, Keystone, Vanessa, Clarkson, Raimondi, Fasani, Anderson Greenwood, Sapag, Yarway and Gimpel.
• Tyco Flow Controls: contact details and other news
• Email this article to a colleague
• Register for the free Processingtalk email newsletter
• Processingtalk Home Page
