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Control valve has been widely used in Chemical & Process Plant for material feeding control and operating condition control. Today control valve technology is high in reliability and availability and long life span. It is a very mature technology. There are many handbooks and articles presented in earlier post "Useful Documents Related to Control Valves" and they are available for download.
Besides theory and practical knowledge in articles, there are still many frequently asked questions related to control valve. Following is a list of frequently asked question (FAQ) related to control valve. It is pretty useful especially to young engineer.
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Besides theory and practical knowledge in articles, there are still many frequently asked questions related to control valve. Following is a list of frequently asked question (FAQ) related to control valve. It is pretty useful especially to young engineer.The question includes :
Related Topic
- What is CV ?
- What is the difference between actual, standard and normal flow rates for gases ?
- What is Cavitation ?
- What is flashing ?
- What is choked flow ?
- How can cavitation damage be contained ?
- How can flashing damage be contained ?
- Is the velocity of a fluid in a control valve critical ?
- What is the difference between a liquid, a vapour and a gas ?
- What is a desuperheater and how does it differ from an attemporator ?
- Why do different control valves have different characteristics ?
- Definition of linear and equal percent characteristic ?
- What is the difference between installed and inherent characteristics ?
- Why are control valves sometimes very noisy ?
- Can two control valves be used in series in high pressure drop applications ?
- Can two control valves be used in parallel to handle high turndown applications ?
- What is the difference between rangeability and turndown ?
- What process data is required to size a control valve ?
- What is incipient cavitation?
- What is the difference between a diffuser plate and a choke ?
- What is a field reversible actuator ?
- Will separable flanged valves seal in a pipeline ?
- What is the trim in a control valve ?
- What is meant by Critical Pressure and Critical Temperature ?
- Is flow through a control valve turbulent or laminar ?
- What is vapour pressure ?
- Specific Gravity is the ratio of the density of a liquid to the density of water – What is Specific Gravity of a Gas ?
- What is meant by Cryogenic ?
- What materials can be used for Oxygen Service ?
- Why do Oxygen valves require degreasing ?
- Are safety valves, regulators and isolating valves all examples of control valves ?
- Why do some control valve actuators have a small internal fail action spring and some are external and larger ?
- Why is live loading sometimes offered on valves ?
- Why is reduced trim required in control valves ?
- How is the characteristic determined in a globe valve ?
- What effect does the positioner cam have on the valve characteristic ?
- Why is Energy dissipation an important factor in control valve selection?
Related Topic
- Useful Documents Related to Control Valve
- FREE & Reliable Control Valve Sizing Software
- Understand Droop Effect in Self-regulated Control Valve
- WELKER Jet Contorl Valve Handbook
- How to apply valve equation in HYSYS Depressuring ?
- Useful Documents Related to Pressure Relief Valve (PRV) - Part 1
- 12 Features required for Shutdown Valve (SDV)
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