CANgas Pressure Cans – The Practical Solution
High purity gases and gas mixtures are commonly manufactured in 10 or 50-liter steel or aluminum cylinders. For many applications, these delivery forms have proven to be the best solution with respect to the provided amount of gas and the practical use. However, in special applications only small quantities of gas are needed and it is inconvenient to deal with a heavy steel cylinder. In such cases, the residual gas in large cylinders will remain unused. All that is needed is a small and light gas can. For these purposes, Messer offers pressurized canisters which are named CANgas. These gas canisters are small, light, handy and can be stored almost everywhere. The handling of gas canisters is extremely simple and only the required amount of gas is provided. All gas canisters supplied by Messer are non-refillable so that they can be disposed of after usage. The canisters are made of aluminum, making them light and compatible with all common components, even reactive ones.
Messer provides an extensive range of pure gases and gas mixtures in various types of gas canisters. Test gas mixtures are delivered with a certificate of conformity which is found on the canister body label. It contains information on the exact composition, the tolerances and the stability of the gas mixture. Depending on the gas mixture, a certificate of analysis can also be supplied. It provides more detailed information on the real value of the corresponding component and its uncertainty.
In order to withdraw the gases from the gas canisters, special equipment is used.
CANgas Aerosol Canisters
Aerosol canisters are particularly lightweight. They are suitable for up to 12 liters (gas content) of non-toxic and non-corrosive pure gases or gas mixtures. Aerosol canisters have a built-in shut-off valve and are equipped with an NPT 1/8” connection.
For the use of aerosol canisters the following release fittings made of aluminum have been established:
The dosing valve is used if:
• pressure reduction is not necessary
• dosing only takes place for a short time (because of the falling primary pressure, constant discharge over a prolonged period is only possible with readjustment.)
• the connected system can withstand a pressure of 12 bar, or is open to the atmosphere
Due to its special construction, the TOP valve provides:
• evacuation up to the closed gas canister valve
• avoidance of contamination during withdrawal
The pressure regulator reduces the output pressure to 0.6 bar (fixed factory setting). The flow rate can be adjusted with the integrated dosing valve. The pressure in the canister is indicated at all times on the primary pressure gauge.
This valve offers:
• exact dosing at reduced working pressure
• virtually constant discharge pressure with falling primary pressure
• limitation of the pressurization of the connected system (e.g. glass apparatus or measuring instrument).
CANgas High Pressure Canisters
High pressure canisters with a capacity of 34, 58 and 110 liters of gas are also available. They are suitable for toxic and corrosive pure gases and gas mixtures. The built-in shut-off valve is provided with the industrial connection 5/8” 18UNF (C10).
Flow regulators with an integrated pressure reducer (fixed factory set pressure value) and a primary pressure gauge, indicating the pressure in the canister, are available for high pressure canisters:
The S70 pressure regulator is optimized for laboratory and field applications
• compact, light-weight design
• fixed factory set outlet pressure of 4.13 bar
• fixed factory set flow rate, optionally from 0.25 to 7 l/min
• available in brass or stainless steel
The S75 is equipped with a flow selector (10 positions) allowing 3 different maximum outlet flows (3, 5 or 15 l/min)
• fixed factory set outlet pressure of 3.5 bar
• integrated safety relief valve
• available only in brass
Application of CANgas Pressure Cans
Test gases are used, for example, for inspection of sensors that monitor the threshold values of toxic and flammable gases in hazardous areas or raise the alarm when environmentally hazardous substances are released. The sensors are usually tested on site using an appropriate test gas. In analytics, for instance automobile exhaust emission control (Lambda gas mixture) or blood gas analysis, operating and calibration gases in gas canisters are used when only small quantities are required. Gas canisters also provide advantages in research and development.
Every application has specific requirements concerning the gases and gas mixtures used and the optimal withdraw systems. Many pure gases and mixtures as well as valves are available for immediate delivery from stock. Whatever the conditions, we are pleased to support you.
