Control valve design aspects for critical applications in petrochemical plants– part III

Journal: 
Valve World
Edition: 
October 2004
Page: 
27-34
Valve World

This final section of Mr Holger Siemers article on control valve design and sizing continues on from part I+II, which can be found in the June and August 2004 issue of Valve World.

 

Control valve design aspects for critical applications in petrochemical plants– part II

Journal: 
Valve World
Edition: 
August 2004
Page: 
34-41
Valve World

This second section of Mr Holger Siemers article on control valve design and sizing continues on from part I, which can be found in the June 2004 issue of Valve World. This section presents information on design, size and use of severe service control valves, the kind of troubles that can be predicted with control valve sizing as well as suggestions for troubleshooting control valve failures. The final section, part III, will be ready and waiting in the upcoming October issue.

 

Control valve design aspects for critical applications in petrochemical plants –part I

Journal: 
Valve World
Edition: 
June 2004
Page: 
37-42
Valve World

With three decades of experience in demanding applications, Mr Siemers has a deep appreciation of developments and trends in sizing control valves. In this paper, he reviews the past, present and future of valve design and sizing, taking all-important issues such as increasing cost pressure and time pressure into account. This paper is presented in two parts: firstly, how to use manufacturer independent software to analyze given or calculated plant parameters in more detail from an overall point of view with a complete power check and optimizing possibilities.

Berechnung vom Dampfumformventilen mit CONVAL®

Journal: 
Industriearmaturen
Edition: 
2-2002
Page: 
118-119
Industriearmaturen

Seit langem schon gibt es herstellerspezifische wie auch unabhängige Softwarelösungen, um verschiedenste Arten von Stellventilen auszulegen und zu optimieren.

CONVAL® hat bisher das Spektrum vom Hubventil über Klappen und Kugelhähne bis hin zum Membranventil mit allen nötigen Zusatzberechnungen abgedeckt.

Im kommenden Release 6.0 wird das Paket unter anderem auch durch Optionen zum Auslegen von Dampfumformventilen und dem dazugehörigen Einspritzventil erweitert.

 

Design of Control valves for gases with high differential pressures

Journal: 
Industriearmaturen
Edition: 
3-2001
Page: 
238
Industriearmaturen

The fact that fluid properties are unknown and typical values for ideal gases are assumed by way of approximation frequently results in the over dimensioning of actuation systems for high differential pressure systems.

The isentropic exponent (kappa) and the valve factor xT can, in particular, have an enormous influence on the coefficient of flow Kv needed. The use of CONVAL® 5.0 software for design with integrated thermodynamic physical data computation and a valve database virtually eliminates such errors.