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Control Valves

Samson Controls:
YOUR PARTNER FOR SUCCESS

Diagnostic tools for control valves

Dr. Jörg Kiesbauer
SAMSON AG,Frankfurt/Main
Digital positioners offer interesting features regarding improved process plant reliability and maintenance or servicing. This could provide the basis for using software tools for early fault diagnosis and performance visualization of control valves with extended functions. These tools can completely preserve the control valve 's condition when new. It can be subjected to trend analyses as well as to preventative maintenance and servicing while in operation.This article describes these possibilities based on an example of such a new diagnostic tool.
Download here
(zipped .PDF, 900Kb - get Acrobat Reader)

Intrinsic safety and flameproof enclosure -
an impossible team in explosion
protection?

Dipl.-Ing Guido König and Prof. Dr.-Ing. Heinfried Hoffmann
SAMSON AG, Frankfurt/Main
Download here
(zipped .PDF, 470Kb - get Acrobat Reader)

  Valve sizing from Samson Controls
General information

Demo version

Update to current version
  Samson Controls - Technical Information
Some great information from our valued sponsor Samson Controls
Cavitation in Control Valves
Introduction to Self-operated Regulators
Plant design and control valve selection under increasing cost and time pressure,
thanks to Samson Controls, Conval and Valve World 
Control valve design aspects for critical applications in petrochemical plants thanks to Samson Controls, Conval and Valve World . This is an excellent paper in three parts which covers Control Valve Design and Sizing.
Enhanced reliability for final elements thanks to SA Instrumentation and Control 

Noise Calculation and Prediction

Valve Noise Prediction verses Velocity Head Limitations in Gas Applications-Joseph Shahda - Principal Engineer Masoneilan -from our valued sponsors Austral Powerflo Solutions and Masoneilan
In recent years, the control valve industry has seen an important debate about the validity of limiting the valve trim exit velocity head to a maximum of 480 kPa in gas and steam applications. This
velocity limitation is assumed to provide an acceptable noise level and avoid problems that arise in control valve gas and steam applications. However, in a very large number of applications, adopting a velocity limiting approach may require the use of expensive multi-stage or multi-turn trim designs.

This article demonstrates that low noise levels can be achieved without following this overly conservative and expensive trim exit velocity head limitation. It also highlights that having a trim exit velocity head lower than 480 kPa will still generate a very high valve noise level if the valve outlet Mach number is high.

Masoneilan Noise Control Manual-from our valued sponsors Austral Powerflo Solutions and Masoneilan

This 24 page manual provides comprehensive informative material regarding noise in general and control valve noise in particular. 

It covers Control Valve Noise, Aerodynamic Noise Prediction, Aerodynamic Control Valve Noise Reduction, Atmospheric Vent Systems, Hydrodynamic Noise and Installation Considerations.

Improving prediction of Control valve noise-From from our valued sponsors Austral Powerflo Solutions and Masoneilan Understanding IEC Aerodynamic Noise Prediction for Control Valves from our valued sponsor Emerson Process Management

Selection and Application

Looking Inside the Valve- by Asher Glaun from our valued sponsors Austral Powerflo Solutions and Masoneilan Smart Valves, Positioners and Flow Conditioning Technology - from our valued sponsors Austral Powerflo Solutions and Masoneilan
Fluid Velocity Considerations - by Jospeh Shahda, Senior Applications Engineer, Masoneilan Operations- from our valued sponsors Austral Powerflo Solutions and Masoneilan Boiler Feedpump Recirculation Valves- from our valued sponsors Austral Powerflo Solutions and Masoneilan
Condensate Pump Recirculation Valve-from our valued sponsors Austral Powerflo Solutions and Masoneilan De-Aerator Level Control - from our valued sponsors Austral Powerflo Solutions and Masoneilan
Natural Gas Storage- Valve Solutions-by Larry Swartz  -from our valued sponsors Austral Powerflo Solutions and Masoneilan The Fisher Control Valve Handbook- This superb 295-page PDF whitepaper is a control valve resource that has been consistently updated for 30 years. It contains vital information on control valve performance and latest technologies. Thanks to www.chemicalprocessing.com and our sponsor Emerson Process Management 

Avoid control valve application problems with physics-based models -Kinetic energy criteria have many limitations- from our valued sponsors Austral Powerflo Solutions and Masoneilan -This article explores the rationale for KE limitations and demonstrates that KE criteria often provide very rough approximations of the actual physical phenomena that cause valve problems

Selecting a Control Valve- from our valued sponsors Austral Powerflo Solutions and Masoneilan
Fluid velocity in a control valve is a key parameter that must be considered when sizing and selecting a control valve. High Fluid Velocities can lead to erosion damage, trim wear, trim component failure, vibration and high noise levels. Therefore, it is vital to design for valve velocities within acceptable limits so that these problems are avoided. This paper addresses these issues.
  Why most Control Valves today are throttling at around 60% opening.- from our valued sponsors Austral Powerflo Solutions and Masoneilan Masoneilan Technical document Warehouse
Super technical information from our valued sponsor from our valued sponsors Austral Powerflo Solutions and Masoneilan
Fluid Velocity Considerations- from our valued sponsors Austal Powerflo Solutions and Masoneilan Looking Inside the valve - from our valued sponsors Austral Powerflo Solutions and Masoneilan
Masoneilan Control Valve Sizing Handbook- from our valued sponsors Austral Powerflo Solutions and Masoneilan Smart Valves-Flow Conditioning Technology- from our valued sponsors Austral Powerflo Solutions and Masoneilan
Fluid Kinetic Energy as a Selection Criteria for Control Valves -by Herbert L. Miller and Laurence R. Stratton
Reproduced with the permission of CCI Sulzer Valves

Implementing MPC to Reduce Variability by Optimizing Control Valve Response- Ever had a problem with split range valves, this paper may just help! Thanks to www.controlglobal.com and our sponsor Emerson Process Management 

Evaluation of Control Valve Performance is Necessary in Plant Betterment Programs
Sanjay V. Sherikar, Ph.D., P.E. CCI
Reproduced with the permission of CCI Sulzer Valves
Getting Optimum Performance through Feedwater Control Valve Modifications -by Brian Leimkuehler, P.E.
(Presently at ComEd, LaSalle County Nuclear Station)
Sanjay V. Sherikar, P.E. CCI
Reproduced with the permission of CCI Sulzer Valves-
 Nelprof Control Valve Sizing and Selection Software -Apply for the CD from our valued sponsor Metso Automation Control and Automated Valve Solutions for the Oil and Gas Industry along with Technical Bulletins
Interesting technical information from our valued sponsor Metso Automation
Control Valves for Heater Bypass applications--from our valued sponsor Metso Automation Smart valves and online monitoring improve operations -from our valued sponsor Metso Automation
Why a Butterfly- Vinod Bhasin -thanks to Sigma Tech- This is a pretty old document but has some good information. Selecting HVAC Control Valves- from Siemens Building Technologies, Inc.
Flow Component and Control valve Research 
-
Utah State University. It includes
Control Valve Testing Procedures and Equations for Liquid Flows
The Dynamic Testing of Check Valves.
Application of Butterfly Valves for Free Discharge, Minimum Pressure Drop, and for Choking Cavitation
Calibration and Verification of Cavitation testing facilities using an orifice-by William Rahmeyer and Fred Cain
Sizing Control Valves- From cheresources.com - This article defines a more standard procedure for sizing a valve as well as helping to select the appropriate type.

  Composite Valves 

Looking for a valve without corrosion problems? These valves made from plastics and potentially using Nanotechnology techniques may just solve them.

  Specialist Power Plant Valves

These valves are specific to those power plant issues such as de-superheaters, steam service etc.

  Valve Positioners

Selection and Application of Positioners, Limit Switches, Solenoid Valves and Other Accessories- Information from our valued sponsor Samson Controls

Doing Business Differently-Digital Positioners-from our valued sponsors Austal Powerflo Solutions and Masoneilan

The next generation of smarter valves part 1 and part 2 - By Béla Lipták, thanks to ControlGlobal.com

Smart technologies sustain plant reliability, help control costs - Todd Gordon - This article highlights the benefits of DVC technologies in a power plant - from Emerson Process Management.

  Valve Actuators

This is ICEweb's Technical Information on Control and Quarter Turn Valve Actuators