Comparing an Electrical Circuit to a Pneumatic Circuit
By Ernie Parker, CFPAI, CFPSD, CFPS, CFPMM, CFPMT, CFPMIP, CFPMMH, CFPMIH
Many times, when we try to come up with a pneumatic circuit to do a particular job, we may think an electrical circuit would do the same job. In the circuit above we have two three-way switches and a four-way switch that will let us turn the circuit on and off from any of the three switches. Below the electrical circuit is a pneumatic circuit with two three-way valves and one four-way valve connected similarly to the electrical circuit. Is there any problem with the pneumatic circuit and if so, what is the problem?
See the Solution
Many times, when we try to come up with a pneumatic circuit to do a particular job, we may think an electrical circuit would do the same job. Is there any problem with the pneumatic circuit and if so, what is the problem?
The answer is that there isn’t a way to vent the pilot port when any of the valves are released.
