1. Butterfly Valve Characteristics
What is a key characteristic of butterfly valves?
Explanation: Butterfly valves are characterized by low cost, high capacity, good flow control, and low pressure drop, making option B the correct choice.
2. Recommended Uses of Butterfly Valves
What are the recommended uses of butterfly valves?
Explanation: Butterfly valves are recommended for fully open/closed or throttling services, frequent operation, and minimal fluid trapping, covering option C.
3. Butterfly Valve Applications
Where can butterfly valves be used?
Explanation: Butterfly valves can be used for liquids, gases, slurries, and liquids with suspended solids, making option C the correct choice.
4. Butterfly Valve Advantages
What are the advantages of butterfly valves?
Explanation: Butterfly valves have low cost, high capacity, good flow control, and low pressure drop, making option C the correct choice.
5. Butterfly Valve Disadvantages
What is a disadvantage of butterfly valves?
Explanation: Butterfly valves have the disadvantage of requiring high torque for control, making option C the correct choice.
6. Butterfly Valve Operation
How is manual operation of butterfly valves typically accomplished?
Explanation: Manual operation of butterfly valves is typically accomplished through a lever or handle, making option C the correct choice.
7. Automation of Butterfly Valves
How can butterfly valves be automated for control?
Explanation: Butterfly valves can be automated using electric and pneumatic actuators, along with electronic control packages, making option B the correct choice.
Short Article on Basics of Butterfly valves
Butterfly valves
Butterfly valves are a type of valve that uses a rotating disc (butterfly) to control the flow of fluid. They are characterized by their low cost, high capacity, good flow control, and low pressure drop. Butterfly valves are commonly used as control valves in applications where the pressure drops required of the valves are relatively low. They can be used in applications as either shutoff valves (on/off service) or as throttling valves (for flow or pressure control).
Recommended uses:
- Fully open/closed or throttling services
- Frequent operation
- Minimal fluid trapping in line
Applications:
- Liquids
- Gases
- Slurries
- Liquids with suspended solids
Advantages:
- Low cost and maintenance
- High capacity
- Good flow control
- Low pressure drop
Disadvantages:
- High torque required for control
- Prone to cavitation at lower flows
Manual operation is accomplished through a lever or handle. Electric and pneumatic actuators can be used to automate butterfly valves. The control capabilities of a butterfly valve can also be significantly improved by coupling it with an operator and electronic control package.
Butterfly valves are a popular choice for a variety of applications due to their many advantages. However, it is important to note that they are not suitable for all applications. For example, they should not be used for applications that require high pressure drops or precise flow control.
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