On Jul 1, 5:20*pm, "Buerste" wrote:
I have some air circuits that are controlled by cams that actuate manual air
valves that look like limit switches with roller arms that follow the cam..
Would I be better off with electric limit switches on the cams and use
electric air valves? *The cam rotates at 120 rpm. *The dwell on the switch
is 45 degrees.

I do have to replace the air switches every 2 years or so.

I will NOT install a PLC or anything more complex.

I have a similar application coming up and will need to use electric relays
to control air valves *or air piloted valves to control air valves. *Which
is more reliable? *I do have really clean, dry air.

Bill's post made me think of this.

I will have to guess, but, since electrical relays bounce when making
a transfer, the air valves will be more reliable.

Paul