Regulate CO2 flow to aquarium CO2 systems with quality electronic devices. Milwaukee Instruments CO2 Solenoid Valve and CO2 Regulator allow quick and convenient installation of low-flow CO2 injection systems. CO2 Solenoid Valve offers the DIY aquarist freedom to create a custom system. CO2 Regulator pre-installed with multiple components ease product selection. Great for use with freshwater-planted aquariums, calcium reactors for saltwater reef aquariums or other low-flow CO2 injection systems.
Milwaukee Instruments CO2 Solenoid Valve (Mfg# MA955) offers safe, secure installation and dispensation of carbon dioxide. Energy-efficient 110V electromagnetic solenoid valve operates on 6W of electricity. 4 ft cord. Fittings included. Milwaukee Instruments CO2 Solenoid Valve measures 3-5/8" x 7/8" x 2" high.
Milwaukee Instruments CO2 Regulator (Mfg# MA957) comes assembled with dual pressure gauges with readings in psi & kg/cm2, flow control valve, 6W electronic solenoid with 4 ft cord, bubble counter, and needle valve to simplify product selection and installation. Milwaukee Instruments CO2 Regulator measures 6-1/4" x 5" x 5-3/8" high. Use with Milwaukee Instruments Professional pH Controller (Mfg# MC122) to fully automate precision CO2 Injection.
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Please click "More Information" for CO2 Regulator Instructions.
Regulator Attachment and Use
- Attach the Regulator to the CO2 Cylinder Valve placing the supplied plastic O-Ring between the Regulator and CO2 Cylinder (tank) and tighten with a wrench. Omission of this O-Ring will cause loss of gas.
- Unscrew the large Brass Ring from the Bubble Counter and fill the Bubble Counter half full with fresh water. Be sure the Needle Valve is closed before filling with water. Once filled, replace the Brass Ring.
- Before opening the CO2 Cylinder Valve, turn the Regulator Flow Adjustment Knob counterclockwise until tension is no longer felt on the knob. Do not fully remove the Regulator Flow Adjustment Knob. If the CO2 Cylinder Valve is opened with the Regulator Flow Adjustment Knob turned in, damage to the Regulator Diaphragm or Right Gauge can result.
- Very slowly and carefully, open the CO2 Cylinder Valve completely to seal the Cylinder Valve Packing. The amount of gas in the CO2 Cylinder can now be read on the High Pressure Gauge.
- Plug the Solenoid into a suitable, grounded AC wall outlet or into a pH Controller. The Solenoid uses slightly more than 6 watts and it is normal for it to feel warm during operation.
- Open the Needle Valve all the way open by turning it counterclockwise.
- Turn the Regulator Flow Adjustment Knob clockwise until you get a reading on the Low Pressure Gauge of approximately 10 lbs or less on the inside set of numbers (psi). You should now see bubbles in the Bubble Counter. It is recommended that you use the Bubble Counter rather than the Right Gauge to determine your flow rate. Only use the Needle Valve if you cannot get the exact flow using the Regulator Flow Adjustment Knob.
- Unplug the Solenoid from the wall or pH Controller, unscrew the Compression Fitting (nut), pass the air hose through the Fitting and attach your air tubing (not provided with the Regulator) to the Nipple. Be sure your air tube fits tightly to the Nipple and is pressed all the way down. Slide the Compression Fitting onto the nipple and tighten.
- Plug the Solenoid back into the wall outlet or pH Controller unit and adjust the bubble count on your Regulator using the Regulator Flow Adjustment Knob as described in the previous adjustment step. Use the Needle Valve for fine-tuning the Bubble Counter if it cannot be accomplished with just the Regulator Flow Adjustment Knob.
Additional Regulator Set up Procedure and Gas Flow Adjustment
If you are using a pH Controller, unplug the Solenoid from the pH Controller and plug your Solenoid into a wall socket or power strip (note the distinct "click"). Do not have your Solenoid plugged into any type of controller or timer to do the following adjustment.
Turn your CO2 Cylinder Off. Turn the Regulator Flow Adjustment Knob counterclockwise until you feel no pressure. Then locate the Needle Valve underneath the Bubble Counter and turn it counterclockwise all the way, until it stops.
Then fully open the CO2 Cylinder. At this point, even with the CO2 tank being at the full open position, you should have no bubbles coming through the Bubble Counter.
Very slowly, turn the Regulator Flow Adjustment Knob until you start seeing some bubbles come out of your Bubble Counter. Do Not pay any attention to the Right Gauge. All you are interested is in the Bubble Counter. You must proceed very slowly when trying to adjust the CO2 Regulator. Go slow, slow, slow; take your time, as we want to slowly work the bubble count up.
Turn the Regulator Flow Adjustment Knob one-eighth to one-quarter turn clockwise and wait about 30 to 45 seconds or longer before making any further adjustments, Continue with this process until you get a bubble count that is equal to what you're looking for. If necessary, use the needle valve as a last resort and as a "micro-adjustment" only. This will keep gas backpressure to a minimum in the Main Regulator Chamber and Solenoid.
Please Note: The Right Gauge is not relevant to adjusting your gas flow. The Bubble Counter is your only true and accurate gauge of gas flow. Therefore, any reference to the right side gauge serves no purpose and is not necessary in the proper set up of the CO2 regulator.
At this point, your gas flow is calibrated. If you are using a pH controller, plug your Solenoid back into the pH Controller box.