Answer
Nested wave springs must be installed such that each turn is perfectly nested within the other. If the waves are out of phase, the spring will function as a series stack or a chaotic hybrid, resulting in a much lower spring rate. Most manufacturers provide nested springs pre-aligned. During assembly into a valve or seal, the technician must ensure no debris enters the nested layers, as even a small particle can prevent the waves from nesting fully, creating a 'thick spot' that alters the load at the specified work height.