You are currently viewing Important Facts: Quiz on Basics of Butterfly valves II 7 MCQs with Explanations

Important Facts: Quiz on Basics of Butterfly valves II 7 MCQs with Explanations

Butterfly Valves Quiz

1. Butterfly Valve Characteristics

What is a key characteristic of butterfly valves?

2. Recommended Uses of Butterfly Valves

What are the recommended uses of butterfly valves?

3. Butterfly Valve Applications

Where can butterfly valves be used?

4. Butterfly Valve Advantages

What are the advantages of butterfly valves?

5. Butterfly Valve Disadvantages

What is a disadvantage of butterfly valves?

6. Butterfly Valve Operation

How is manual operation of butterfly valves typically accomplished?

7. Automation of Butterfly Valves

How can butterfly valves be automated for control?

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


  • Liquids
  • Gases
  • Slurries
  • Liquids with suspended solids


  • Low cost and maintenance
  • High capacity
  • Good flow control
  • Low pressure drop


  • 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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