Spring elasticity
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We have a two-position programmable valve; due to not being used for a long time, it fails to operate when needed in an emergency. Upon disassembling the valve, it was found that the spring had been in a compressed state for a long time and had lost its elasticity. I would like to ask everyone why a spring loses its elasticity when it remains in a compressed state for an extended period of time
It is related to the yield strength of the material; for more details, refer to a book on metal materials science. I can’t remember. .
A range of 20% to 80% is considered normal; it’s best not to go beyond this range
Why can’t it be turned all the way on or all the way off? What effect does turning it all the way on or off have on the spring?