Raucina, I never said anything about a Cycle Stop Valve in this thread. However, now that you mentioned it, I will say that a CSV will make your pump start and stop while only pumping 1 GPM instead of full pump capacity. Starting and stopping at 1 GPM is much easier on everything in the system, especially the check valve.
Several people on this thread are pump owners that are thoughtful enough to share their real life experience on this matter. Every pump person on this thread has posted their name, web page, and or contact info. You could easily pick up the phone and call any of us for advice. They are not hiding behind their anonymity, what about you?
If you believe that manufactures are making products to last and not just to make money, then I have some land in Louisiana I would like to sell you.
I have studied in great detail, velocity, check valve designs, operating speeds, and other things. That is WHY I know that none of this matters if you have multiple check valves working against each other.
I only censor false or misleading information about pump systems, to try and lessen the confusion for readers. This subject is already confusing, without any misinformation. Maybe we would get a few more pros here to discuss such things, if their every reply was not being constantly refuted as having purely self serving commercial motives. Comments from people who have a pump or two of their own is greatly appreciated. However, those who have sold, and then had to stand behind, many different brands of pumps and equipment, have knowledge that cannot be learned from any school or books. As with any subject, information from people with actual experience with the products and methods available should be highly regarded.