Chapter 07 - Control Valve

Chapter 07 - Control Valve - II. CONTROL VALVES Various...

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II. CONTROL VALVES ± Various opening sizes. o b a s i c t p e s : ± Two basic types: 1. Shut-off valve: can be fully opened or fully closed. 2. Throttling valve; the opening can be adjusted to be anywhere in between fully pened and fully closed Dr. Abdirahman CHAPTER 7 Page 21 of 41 opened and fully closed.
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Dr. Abdirahman CHAPTER 7 Page 22 of 41
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III. VALVE DESIGN ± Types: 1. Globe Valve . eedle Valve 2. Needle Valve 3. Ball Valve 4. Butterfly Valve Dr. Abdirahman CHAPTER 7 Page 23 of 41
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i. Globe Valve ± Mostly employed in industry. ± Consists of 3 categories: a. Single Port imple construction 9 Simple construction. 9 For sizes under 2 inches. as a tight valve closing 9 Has a tight valve closing. 9 High imbalance of force. Dr. Abdirahman CHAPTER 7 Page 24 of 41
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i. Globe Valve b. Double port igher flow capacity (>2 inches) 9 Higher flow capacity (>2 inches). 9 Balanced force. c. Three way 9 To connect or divert the passage of flow. Dr. Abdirahman CHAPTER 7 Page 25 of 41
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Dr. Abdirahman CHAPTER 7 Page 26 of 41
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ii. Needle Type or high pressure ± For high pressure usage. Used when a small flow at a big flow range is required. Dr. Abdirahman CHAPTER 7 Page 27 of 41
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iii. Ball Type ± Consists of a solid ball and its cage. ± Provides a firm closing and a high range.
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Chapter 07 - Control Valve - II. CONTROL VALVES Various...

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