CO2 Cartridge Mechanism that releases short bursts when triggered

[loganbecker017]

I am working on a project. I need a mechanism (probably a valve) that releases the Carbon dioxide out of a CO2 cartridge only when a trigger is pressed, and in very short bursts. The mechanism can be no larger than 20mm in length and 8mm in width. Please respond with solutions on the market.

 

[gerhardl]

More details please: pressure, delta P, amount of gas, time, pressure or amount regulated, hand or automatic, el., air. etc. At smaller openings icing could complicate closing.

 

[loganbecker017]

The mechanism's function will be as a propellant for an oral product. The super cool expelled gas is purposeful for the concept design. The CO2 cartridge has 8 grams (Amount of gas) of CO2 and an inlet pressure of 850 psi (Pressure). With the variable being the size of the orifice and time for the opening, ideally I want to achieve an outlet pressure of 20-40 psi (Delta P) for .33 seconds (Time) displacing 1/100 up to 5/100 (Amount regulated) of the 8 grams of CO2. It needs to be manually operated.

 

[gerhardl]

I can see why you have problems, and cannot find any existing commercial product. Nearest would probably be through a supplier of dentist equipment.

Micro check-valves within your measurements and pressure restrictions exist. Perhaps a standard micro check-valve could be modified to suit your purpose?

See for instance attached link.

Suggestion: connect your cartridge to the spring-actuated side of the valve. Cap the front end to make it gas-thigt. Make an outlet opening for released gas in the cap, or near the cap sidewise. Release the gas by adding a hand operated device to force the checkvalve's ball backward to open against the spring and gas pressure. Release the hand operated device (lever? push-button spindle? spring assisted?) and the spring will close the ball, helped by the gas pressure.

 

[gerhardl]

Forgot the link:

http://leecat.theleeco.com/ecatalog/chek-valves/en/CKFA1876601A