Why doesn’t the handwheel of a straight-through gate valve fall off when it is opened?
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Why doesn’t the handwheel of a straight-through gate valve fall off when it is opened?
It is recommended that the original poster take one apart to have a look; it’s quite clear. When it is opened, the valve stem drives the valve plate, and the valve stem is connected to the valve plate. Once it reaches the full open position, it can no longer be moved any further, and it won’t fall off
Turning the handwheel moves the yellow valve stem nut, and the valve stem nut in turn causes the valve stem to rise; this is a transmission chain that reduces torque
With nothing to do, I turned off that copper nut at the very top, disassembled it to take a look, and understood everything: lol
If the handwheel can be turned off, then how can the gate be opened or closed?
Take a look at the screw, over there; you’ll understand on your own. There are also those upstairs who say it’s a hidden rod···