What type of globe valve is used for fine control over throttling?

What type of globe valve is used for fine control over throttling?

• A. Butterfly valve
• B. Needle valve
• C. Check valve
• D. Ball valve

Answer: (B)

A needle valve is specifically designed for fine control over throttling because of its small flow passage and the elongated, tapered needle-like disk that can be adjusted to control the flow precisely. This type of valve allows for adjustments to flow rates in small increments, making it ideal for applications where accurate flow regulation is required. In contrast, a butterfly valve is typically used for on/off control with limited throttling capability, while a ball valve offers quick shut-off and is not optimized for fine adjustments. Check valves are designed primarily to prevent backflow and do not provide control over the flow rate. Thus, the needle valve stands out as the most suitable choice for applications requiring precise throttling control.

A needle valve is specifically designed for fine control over throttling because of its small flow passage and the elongated, tapered needle-like disk that can be adjusted to control the flow precisely. This type of valve allows for adjustments to flow rates in small increments, making it ideal for applications where accurate flow regulation is required.

In contrast, a butterfly valve is typically used for on/off control with limited throttling capability, while a ball valve offers quick shut-off and is not optimized for fine adjustments. Check valves are designed primarily to prevent backflow and do not provide control over the flow rate. Thus, the needle valve stands out as the most suitable choice for applications requiring precise throttling control.