What type of valve is designed to control the water flow rate by partially opening or closing?

What type of valve is designed to control the water flow rate by partially opening or closing?

• A. Gate valve
• B. Globe valve
• C. Check valve
• D. Throttle valve

Answer: (D)

Flow control comes from adjusting the opening size of the valve passage. A throttle valve is built to do exactly that: by turning the stem, you move a element toward or away from the seat, changing how wide the passage is. This partial opening lets you fine-tune the flow rate—more opening increases flow, less opening reduces it. That precise regulation is the key purpose of a throttle valve. Gate valves are designed mainly for on/off shutoff and aren’t suited for steady flow control. Check valves prevent backflow and don’t regulate forward flow. Globe valves can be used for throttling and do offer good control characteristics, but the device described—designed specifically to regulate flow by partial opening—points to a throttle valve.

Flow control comes from adjusting the opening size of the valve passage. A throttle valve is built to do exactly that: by turning the stem, you move a element toward or away from the seat, changing how wide the passage is. This partial opening lets you fine-tune the flow rate—more opening increases flow, less opening reduces it. That precise regulation is the key purpose of a throttle valve.

Gate valves are designed mainly for on/off shutoff and aren’t suited for steady flow control. Check valves prevent backflow and don’t regulate forward flow. Globe valves can be used for throttling and do offer good control characteristics, but the device described—designed specifically to regulate flow by partial opening—points to a throttle valve.