The opening and closing time of a globe valve is the amount of time it takes for the valve disc to move from fully closed to fully open, or from fully open back to fully closed. Because a globe valve uses a linear rising stem and a multi-turn handwheel or actuator, its operating time is usually longer than valves like ball valves or butterfly valves.
Typical Opening and Closing Time
①Manual Globe Valve
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Small sizes (DN15–DN50):
5–12 seconds with normal handwheel rotation. -
Medium sizes (DN65–DN150):
10–25 seconds depending on stem travel and operator force. -
Large sizes (DN200–DN350 and above):
25–60 seconds or more, since they require many turns to move the disc.
②Electric Actuated Globe Valve
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Most electric actuators operate within:
20–60 seconds (standard speed)
Slow-speed actuators may take up to 120 seconds for large valves to avoid water hammer.
③Pneumatic Actuated Globe Valve
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Faster than electric but slower than on/off valves.
General range: 3–20 seconds, depending on air supply and actuator size.
Why Globe Valves Take Longer to Operate
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①The stem must travel a longer distance to modulate flow precisely.
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②The handwheel requires multiple turns to avoid sudden pressure changes.
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③The valve design prioritizes flow control and accuracy instead of fast shutoff.
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④Slow operation helps reduce water hammer, especially in marine and industrial systems.
Factors That Affect Operating Time
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①Valve size and pressure rating
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②Stem thread pitch (fine threads = slower movement)
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③Type of actuator (manual, electric, pneumatic, hydraulic)
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④System pressure
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⑤Friction or wear inside the valve
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⑥Torque or speed settings on actuators
For marine applications, slower closing is deliberately used to protect seawater systems, ballast lines, and cooling systems from sudden pressure surges.
Post time: Nov-20-2025