I am trying to determine if the spring in a valve has the right Rate for our application. The Rate of the spring that is in the valve is 29lbs/in. The spring holds a plug closed, under normal water pressure, I need to know if the spring will be able to handle a higher water pressure, something like 125 psi. So when the plug retracts, the spring can close the plug against the water pressure. I don't want to ramble on here, if you can give me some help or have some questions I can answer, I'd be grateful. I know what I'm trying to achieve but I'm stumbling on how to get there. Thanks in advance.