Precision welding gas mixer helps maximize helium
The world is running out of helium and this has spurred new research from industries that require use of helium as a shielding gas for welding metals. Competing for what helium is left is the MRI industry (coolant for magnets), NASA (used to pressurize rocket fuel tanks), particle accelerator research, and of course, the party balloon industry. As this precious resource is depleted welding experts strive to experiment with different mixtures that use less helium while providing the same quality weld. This research requires a gas mixer with precise independent component control; a feature that is lacking in modern welding equipment.
The Columbus Instruments Pegas 4000 Gas Mixer provides a means to control up to four individual component gases using very precise thermal mass flow controllers. Concentrations can be adjusted on the fly or dynamic mixing schedules can be preprogrammed using the included software. The system is equipped with an internal microprocessor to perform all of the needed calculations and to provide signals to the flow controllers. The user only needs to enter the total flow and the concentration of each component gas. A front panel rotometer shows the flow of mixed gas.
Pegas 4000 Gas Mixer Specifications:
* Dimensions: 13" x 11.5" x 7.5" (33 x 29 x 19 cm)
* Weight: 14 pounds (6.4 kg)
* Flow controller ranges: 0-5 ml (lowest range); 0-100 l/min. (highest range)
* Flow controller accuracy and linearity: +/-1% full scale
* Flow controller repeatability: 0.2% full scale
* Input pressure: 30 PSI
* Outlet pressure: 0-20 PSI
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