globe valves are used for pressure differential big media
In the daily use of large diameter cut-off valve, the user is often
reflects a problem, namely large diameter Globe Valves are used for
pressure differential big media, such as steam pressure, and high
pressure water with work, as it is often difficult to close, no matter
how hard, he always finds that there will be shut, it is difficult to
shut, leakage phenomenon caused by this one problem is the reason of the
valve and structure design of the limit of the output torque.
The average adult level limit output force for 60-90kg, depending on different constitution.
Generally the Globe Valves for low flow design, when people into higher
closing valves, human level, promoting the handwheel rotating disc
downward motion, realize closed, then need to overcome three aspects,
namely, the combination of:
1) Fa; axial thrust Fa,
2) Fb; with stem packing friction Fb,
3) Fc stem and disc core contact friction Fc
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