[Ed Law]

I am very confused. First, update 5 says that if we use a solenoid valve rated at less than 125 psi, then we need to have a pressure relief valve in the same zone as the solenoid valve set at its rated maximum.

We are using SMC SY3000 series which is rated at roughly 101 psi. How can the pressure reach over 100 psi when it is in the 60 psi zone regulated by the primary regulator?

The second thing that confuses me is that I just read that we are not allowed to adjust the pressure relief valve. Does that mean we can not buy a pressure relief valve and adjust it to 100 psi? Are we suppose to buy one that is set to 100 psi and not adjustable?