Is there not a valve available that is either normally open or normally closed where when power is applied it energizes motor open or closed and when not it does opposite. That way your not using two spots on controller..?Those are the correct valves. These have built in limit switches that trigger when a the open or close reached the correct rotation. The two cords differentiate an open or close "command." Maybe there is a better way to wire it? The schematic shows switches to change open to close...
usually a automatic valve has a spring return to it's a rest state. Some do not, but the majority do. They way I read the schematic, this valve should be closed when no power is being supplied to the positioner. It looks to me like a relay through one spot on the controller would work. I'm not familiar with this particular valve, but most of what I work with operates that way.
Be sure to post a thread when you do! I work in the SoCal aerospace market, automation is gaining ground in several areas. My other thought was to use something like this in place of a check valve, programmed to close when power failed. On a battery backup system this would be much more reliable if the system needed to stop drainage from display to sump.
Indeed there is a valve available with spring back option, however, I like the control of leaving a valve in either position. I feel this is the primary benefit of a motorized valve. A solenoid on the other hand should be NO or NC.
This specific valve is designed for acidic liquids, saltwater shouldn't cause any damage. In the case it does in years to come, the entire ball valve assembly is rebuildable. In this case I won't have to buy a new valve, just internal parts.
This is a great idea! I have a solenoid to control my filling of the RODI tank based on float switches in the tank. Using a solenoid for Washing the membrane before and after is a good idea, I might need to order another solenoid!
Can you explain a little further? What would activate the relay if not for an outlet?
Could you suggest a wiring schematic for utilizing a relay? I didn't feel my wiring was the most efficient, however, my background is not in electrical engineering.
Ha! This makes perfect sense! Not only will this free up an outlet, it will also simplify the Apex programming somewhat!
Also prevents you from making a mistake on that Apex, and energizing both OPEN and CLOSE sides of the valve at the same time... that could be bad :)
This is exactly my thought. Currently the outlets are programmed with a 3 second delay to keep one from coming on before the other goes off. Relay is ordered, now to find a proper project box for this little addition...
