[EricH]

I'm going to say that the inspectors will want you to move that one to before the solenoid.

<R76> “Working” air pressure on the ROBOT must be no greater than 60psi. All working air must be provided through one primary Norgren adjustable pressure regulator.
A. All “working” pneumatic components (e.g. valves, cylinders, rotary actuators, etc.) must be downstream from this regulator.
B. Only the compressor, relief valve, pressure switch, pressure vent plug valve, pressure gauge, storage tanks, tubing, and connecting fittings may be in the high-pressure pneumatic circuit upstream from the regulator.

Let's see here: Solenoids could be counted as valves. Solenoids are not explicitly allowed upstream of the primary regulator and are therefore illegal to have upstream of said regulator.

You'll definitely have to move that regulator that supplies the working stuff. And don't forget, you'll need the gauges to verify the setup.