Needle valves are generally not used for___________________?
Correct answer: C. Very large diameter pipes
- A. Very accurate flow control
- B. High pressure throttling service
- C. Very large diameter pipes
- D. Smaller sizes of pipe
Explanation
Needle valves provide precise throttling through a small tapered opening, but their fine construction is impractical and expensive for very large pipe diameters. They are mainly used in small lines and high-pressure, accurate-control service.
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