Personally I would not use a valve rated at less than the hydraulic pressure of my tractor.
In my case, that pressure is about 2,000 psi. By choice I will use a valve rated at 2,000 PSI minimum, and probably 2,500 PSI when it is all over and I get around to installing my T&T.
I think using a valve rated for less pressure that the system operates at is asking for trouble in the long term, and mabye even in the short term...
That is just an opinion. I have no experience, other than general life experience, to back it up...