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Catching unfit control valves
22 March 2017

How do you catch those unfit control valves during your project before it is too late? I mean too late before it really hurts! Before it eats your energy! Before it gives you sleepless nights! During my 42 years in the petrochemical industry, working 35 years for an American oil and gas major, I was often involved in large and mega projects as the automation engineer responsible for the engineering, commissioning and startup of instrumentation and control including those control valves.

Applying KPIs for valve reliability in projects with valve manufacturers, EPCs and end-users
13 January 2017

Large capital projects in plant engineering come along with special challenges. It’s not unusual that starting up a plant for the first time and get it operating reliable causes reengineering and replacement of critical control valves and may lead to startup delays and significant operation loss in the early beginning of its live cycle. Applying new principles of operation for “Non Process Quality Control” (NPQC) show the way to a signi- ficant increase of quality in valve selection and reduction of cost for the plant operators at a very attractive cost benefit ratio.

A new CAT on the NPQC scene!
27 May 2014

I am ready to introduce a new CAT on the NPQC scene, with focus on control valves! If you don’t know what I am talking about? Then please read on and let me explain.

Controllability Index: the effective CONVAL® 8.0 approach to optimize your valve configuration
07 October 2009

Prediction of regulation quality has recently repeatedly been the subject of discussion and debates, and it can be assumed that a practical and objective application guideline for regulation quality, orientated around the end-user's needs, will be presented during the further course of this year. With a view to efficient determination of the optimum valve configuration during the initial phase of design and valve selection, a static regulation quality index has been unveiled and implemented in CONVAL® 8.0.

Optimized design and selection of valves using a controlability index
06 October 2009

Prediction of regulation quality has recently repeatedly been the subject of discussion and debates, and it can be assumed that a practical and objective application guideline for regulation quality, orientated around the end-user's needs, will be presented during the further course of this year. With a view to efficient determination of the optimum valve configuration during the initial phase of design and valve selection, a static regulation quality index has been unveiled and implemented in CONVAL® 8.0.

Nanhai revisited
31 January 2006

Interview with lead engineer for instrumentation and control Mr. Teun Hooftman.

The April 2005 issue of Valve World included an article looking at the 4000 control valves being specified for the massive Nanhai project in China. This follow-up article takes control a step further, looking at the 60-odd severe service control valves that have been specified.

The solutions were found with the help of CONVAL. 

Plant design and control valve selection under increasing cost and time pressure - Part II
31 May 2005

This is the second and final section of Mr Siemers´ technical paper addressing plant design and control valve selection when working under increased time and cost pressure. The first section (April issue) focused on control valve operating points and provided a case history involving a mismatch before introducing better valve sizing practices.

Plant design and control valve selection under increasing cost and time pressure - Part I
31 March 2005

Following a career spanning three decades, Mr Siemers is well aware of the pitfalls to be avoided when specifying control valves for a range of demanding applications.

In his latest paper for Valve World, he looks further into plant design and control valve selection when working under increased time and cost pressure. This article is split into two parts: broadly speaking, part one looks at control valve operating points and provides a case history involving a mismatch.

Control valve design aspects for critical applications in petrochemical plants – part III
30 September 2004

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
31 July 2004

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.

 

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