Unmetered solenoids
 

Are we allowed to use un-metered solenoid valves this year?

And can we use the 120 psi for our cylinders or just 60psi? Were fuzzy on the "working" vs "stored"

Re: Unmetered solenoids
 

For your second question, divide your pneumatic section in two. Generation/storage and working air. On generation and storage, you can have 120 psi, and between generation and working air have a regulator set to 60 psi.

But can we use 120 on pistons?

Re: Unmetered solenoids
 

They are called "cylinders" and no...you can only have 60 psi in the working system of your pneumatics...that is, the part that performs your mechanical tasks.

Re: Unmetered solenoids
 

If it isn't listed in R77, it isn't legal. That said, solenoids are fairly wide open--take a look at R77C, R77D, and R75--but also R74, which simply says that if it isn't listed, it can't be used.


Now, as for the second question: You have two pressures. Pressure #1 includes the compressor, pressure sensor, vent valve, at least one gauge, and as many storage tanks as you care to have at 120 psi--and a regulator. Figure 4-15 from R78 may be helpful here.

Pressure #2, on the other side of that regulator, is at 60 psi, and includes a gauge and however many solenoids and cylinders you happen to be using, possibly including more storage tanks and possibly some regulators as well.

Oh, and there IS a rule on this. R83 is what you were missing--it's a list of what can be at 120 psi. There are no cylinders or solenoids in that list.

Re: Unmetered solenoids
 

Can you describe what you mean by "un-metered"?