Control of pre-tightening force during the installation of control valves
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I would like to ask everyone: when maintaining a pneumatic control valve, after removing the clamp from the valve stem, what amount of pre-tensioning force is needed to determine the new position of the clamp in order to maintain the valve’s original operating range? Is the pre-tensioning force required to set the clamp in place the same for air-operated open valves and air-operated closed valves? What should it be adjusted to? :):) Thank you so much:handshake:handshake
If the position remains unchanged, there’s no need to worry about it; just fix it in place
@wdyhm Hello, I have now reinstalled and removed the connection between the actuator and the valve stem; this time I made marks so that it can be reassembled. I’m wondering what the appropriate level of pre-tension is – that way I won’t need to make marks every time I disassemble it{:1_90:}
As long as there are no leaks, tightening the bolts a little bit will do
I usually give 5-8 millimeters depending on the valve port diameter.