A/C Is there a way to test an expansion valve?

[BJ300SDL]

Is there a way to test an txv?

I just put in a new condensor (because of a slow leak), rebuilt the comp., all new o-rings, new txv, and new dryer.

Low side 25psi, high side 200. Ambient 70 deg., 50% hum.
Vent temp., only 50 deg. No mositure on the suction line just a little cool. discharge line warm not hot.

Had someone on an A/C forum tell me it is possible to have a bad txv and act like that.

I also charged the system watching the sight glass so I can't tell you if it has the proper amount of r-12. Any ideas?

It is an 87' sdl.

Thanks Barry!!