Pneumatic Sov configuration Puzzle
Pneumatic Sov configuration Puzzle
(OP)
Hi all i am from the electrical forumn but i am puzzled with a pneumatic question.
I have a dump valve at the bottom of a vessel which is energise to dump. We have to control this valve via two 5 port solenoids. How do i configure the ports if possible for each solenoid to dump independant or both together. I can't seem to suss out the venting of the valve.
Hope this is clear
I have a dump valve at the bottom of a vessel which is energise to dump. We have to control this valve via two 5 port solenoids. How do i configure the ports if possible for each solenoid to dump independant or both together. I can't seem to suss out the venting of the valve.
Hope this is clear





RE: Pneumatic Sov configuration Puzzle
RE: Pneumatic Sov configuration Puzzle
You should place both solenoids parallel. Actually you do not need 5/2 way solenoids. 3/2 way valves will do the job. But this also means that you can still use the 5/2 way solenoids you have and only need to plug off the extra gates.
Conclusion:
- Place both solenoids parallel.
- Connect the air supply to both P-ports.
- Connect the dump valve to both A-ports.
- Both EA-ports should be vented.
- Both B-ports should be blocked off.
In case one or both of the solenoids are energised your dump valve will get air pressure.
Good luck.
Terje
RE: Pneumatic Sov configuration Puzzle
That is the case if the outlet valve was spring operated to close. But what if the valve needs pressure to shut.
Cheers
RE: Pneumatic Sov configuration Puzzle
A simple solution would be to use an extra computing relay.
E.g.
- put a reversing relay (Fairchild model 25) in the line to the dumpvalve and connect the output to the other side of the dump valve.
- put an low selector relay (Fairchild model 90) between the two B-ports and connect the output to the other side of the dumpvalve.
RE: Pneumatic Sov configuration Puzzle
RE: Pneumatic Sov configuration Puzzle
Standard 5 Port Sov i guess bi-directional but not 100%.
Many Thanks for your help on this subject.
RE: Pneumatic Sov configuration Puzzle
I looked at this fresh after the weekend and have no better solution then earlier suggested. Adding a reversing relay would be my preferred suggestion.
Good luck,
Terje
RE: Pneumatic Sov configuration Puzzle