Citation:
Karan Sotoodeh.Challenges Associated with the Bypass Valves of Control Valves in a Seawater Service[J].Journal of Marine Science and Application,2020,(1):127-132.[doi:10.1007/s11804-020-00132-8]
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Challenges Associated with the Bypass Valves of Control Valves in a Seawater Service
Karan Sotoodeh.Challenges Associated with the Bypass Valves of Control Valves in a Seawater Service[J].Journal of Marine Science and Application,2020,(1):127-132.[doi:10.1007/s11804-020-00132-8]
Info
- Title:
- Challenges Associated with the Bypass Valves of Control Valves in a Seawater Service
- Author(s):
- Karan Sotoodeh
- Affilations:
- Keywords:
- Control valve; Bypass valve; Flow capacity; Restriction orifice; Offshore; Oil and gas
- DOI:
- 10.1007/s11804-020-00132-8
- Abstract:
- Modern processing plants use a variety of control loop networks to deliver a finished product to the market. Such control loops, like control valves, are designed to keep process variables such as pressure, temperature, speed, flow, etc. within the appropriate operating range and to ensure a quality product is produced. All control valves have a bypass so that production can proceed if maintenance is needed for the control valve as part of the control loop. The important point is that in both operation and maintenance situations, the bypass valve and the control valve should have approximately the same flow capacity to provide nearly the same amount of pressure. This paper presents a case study in seawater service on the selection of manual bypass valves for a 16″ control valve in class 150 and titanium material. A 16″ butterfly valve of class 150 was chosen for the control valve bypass, which provided a much higher flow capacity than the control valve. In this paper, four solutions are recommended to achieve the same coefficient value (Cv) for the control and bypass valve. Using the reduced size butterfly valve could be the cheapest and best solution. On the other hand, selecting the same control valve for bypass line is the most expensive but maybe the most reliable solution. Using a flow orifice for throttling could be ranked as the second expensive option and the second reliable one. Selection of butterfly valve for throttling is the second cheapest option, but it has the least reliability. Different parameters such as space and weight saving, cost as well as reliability have been considered in evaluation of different solutions.
References:
Fisher & Emerson Automation Solutions (2017) Control valve handbook, 5th ed. York, New
Instrument Society of America (1998). Control valve features:evaluating the need for bypass and block valves. Available from:https://www.globalspec.com/reference/13638/179909/chapter-10-23-controlvalve-features-evaluating-the-need-for-bypass-and-block-valves
International Organization for Organization (2003). Measurement of fluid flow by means of pressure differential devices inserted in circular conduits running full. ISO 5167, 2nd edition, Geneva, 1-20
Nayyar ML (2000) Piping handbook, 7th ed. McGraw-Hill Education, New York, pp 25-150
Nesbitt B (2007) Handbook of valves and actuators:valves manual international, 1st ed. Elsevier, Oxford
Parisher RA, Rhea RA (2002). Pipe drafting and design. 2nd ed., Gulf Professional Publishing, 112-152
Skousen PL (2011) Valve handbook, 3rd ed. McGraw-Hill Education, New York, pp 10-95
Smit P, Zappe RW (2004) Valve selection handbook, 5th ed. Elsevier, New York, pp 20-120
Sotoodeh K (2016) Cavitation in globe valves and solutions. Valve World Magazine 21(3):32-36
Sotoodeh K (2018a). Valve selection for bypass of control valves:A case study. Available from:http://www.valvemagazine.com/web-only/categories/technical-topics/9454-valve-selection-for-bypass-ofcontrol-valves-a-case-study.html[Accessed on Jan. 23, 2019]
Sotoodeh K (2018b) Why are butterfly valves a good alternative to ball valves for utility services in the offshore industry? Am J Ind Eng 5(1):36-40. https://doi.org/10.12691/ajie-5-1-6
Sotoodeh K (2018c) Selecting a butterfly valve instead of a globe valve for fluid control in a utility service in the offshore industry (based on an industrial experience). Am J Mech Eng 6(1):27-31. https://doi.org/10.12691/ajme-6-1-4
Sotoodeh K (2019a). Actuator selection and sizing for valves. Springer nature applied science, Vol. 1, article No. 1207(2019). https://doi.org/10.1007/s42452-019-1248-z
Sotoodeh K (2019b) Noise and acoustic fatigue analysis in valves case study of noise analysis and reduction for a 12″ x 10″ pressure safety valve. J Fail Anal Prev 19(3):838-843. https://doi.org/10.1007/s11668-019-00665-3
Memo
- Memo:
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Received date:2019-04-08;Accepted date:2019-11-06。
Corresponding author:Karan Sotoodeh,Karan_sqi@yahoo.com
