Solenoid switch for oxygen tank?

Any of you engineers or electricians have any ideas and where to get a solenoid switch and directions to keep an oxygen tank closed when the electrical power is on, but open it to release oxygen into an air stone when the power goes out? I'm using an inverter and a bank of deep cycle batteries right now. This will run my small scale RAS for several hours but was checking into this as a way to disconnect my linear air pump, and get a few more hours out of the batteries.

I can rent an oxygen tank very economically from a local auto parts stores. For those of you that have aquariums this may be an option with a small pony size oxygen tank.

The inverter with just one deep cycle battery would probably run an aquarium for at least 20 hrs. Here's what I'm using:

Any of you engineers or electricians have any ideas and where to get a solenoid switch and directions to keep an oxygen tank closed when the electrical power is on, but open it to release oxygen into an air stone when the power goes out? I'm using an inverter and a bank of deep cycle batteries right now. This will run my small scale RAS for several hours but was checking into this as a way to disconnect my linear air pump, and get a few more hours out of the batteries.

I can rent an oxygen tank very economically from a local auto parts stores. For those of you that have aquariums this may be an option with a small pony size oxygen tank.

The inverter with just one deep cycle battery would probably run an aquarium for at least 20 hrs. Here's what I'm using:

You will need something like this. A 120 volt normally open solenoid. When power is applied it is closed. When the power fails it will open. So all you need to do is connect a cord to the solenoid and plug it into a power source. You will also need a regulator to control the pressure before it goes into the solenoid. Call STC and they will make sure you get the correct solenoid for your application.

http://www.stcvalve....ons_2SO_2WO.htm

You will need something like this. A 120 volt normally open solenoid. When power is applied it is closed. When the power fails it will open. So all you need to do is connect a cord to the solenoid and plug it into a power source. You will also need a regulator to control the pressure before it goes into the solenoid. Call STC and they will make sure you get the correct solenoid for your application.

http://www.stcvalve....ons_2SO_2WO.htm

Thanks! Now I just have to figure out where to put the diffuser and hose as not to impede circular water flow in the tank. I love solving problems though.

Will you have circular water flow when the power goes off? Maybe you can make a venturi.

http://leisure.prior...ri_construction

Thanks! Now I just have to figure out where to put the diffuser and hose as not to impede circular water flow in the tank. I love solving problems though.

I believe Rex(pondboss) said that very fine diffusers are the ticket with pure O2.

Thanks! Now I just have to figure out where to put the diffuser and hose as not to impede circular water flow in the tank. I love solving problems though.

Yes, spray bar and and RBC run off the same 60 watt pump.

I believe Rex(pondboss) said that very fine diffusers are the ticket with pure O2.

Absolutely. Fine ceramic diffusers such as "4point" are the only way to go with oxygen. I have two of them and one in a hauling tank.

Edited by az9, 21 November 2011 - 10:59 PM.

Will they stay good (ie not clog with algae) if left on standby in the tank with no flow through them?

Will they stay good (ie not clog with algae) if left on standby in the tank with no flow through them?

Turn them upside down? Less light. Put the solenoid on a timer, and cycle it weekly?

Will they stay good (ie not clog with algae) if left on standby in the tank with no flow through them?

No algae in my inside tanks. Not enough light and perhaps the 0.2 percent salinity is detrimental to it?

I'm thinking perhaps side mount the diffuser on a tank wall where debris won't collect? As long as there is circular flow the oxygen should mix in with the tank right?

Edited by az9, 22 November 2011 - 09:48 PM.