Industrial Gas Mixture

1. Gas Mixture for Laser
Using CO 99.999%, CO2 99.999% and hydrogen 99.999%, HP nitrogen, HP helium and other high purity gases, according to the proportion of laser generator requirements prepared the premix gas. The purity of the gas in the laser mixture directly affects the performance of the laser, especially the impurities such as oxygen, water and hydrocarbon in the gas, which will lead to the loss of the laser output power on the mirror (surface) and electrode, and also cause the instability of laser emission. Therefore, there are special requirements on the purity of laser mixture components, and the cylinder must be dried before filling to prevent contamination. Auxiliary laser gas required for different gas: Oxygen is good for steel structure. When oxygen is used as the processing gas, the cutting edge is slightly oxidized. For plates up to 4mm thickness, nitrogen can be used as a processing gas for high-pressure cutting, in this condition, the cutting edge can’ t be oxidized. For plates up to 10mm thickness, better results can be obtained by using special pole plate for laser machine and coating the cutting plate surface with oil. Cutting stainless steel, if there is no requirements on cutting edge, oxygen can be used; if using nitrogen, cutting edges will be free of oxidation and burrs, so need no more treatment. Coating oil film on the surface of the plate will get better perforation effect without reducing the processing quality. Although aluminum material has high reflectivity and thermal conductivity, thickness below 6mm can be cut which depends on the alloy type and laser capability. When cutting with oxygen, the cutting surface is rough and hard; When cutting with nitrogen the cutting surface is smooth. Pure aluminum is very difficult to cut because of its high purity and should only be cut if a "reflection-absorption" device is installed on the system. Titanium plates are cut with argon and nitrogen as the processing gas. Both copper and brass material have high reflectivity and excellent thermal conductivity, thickness below 1mm can be cut with nitrogen; Brass plate with thickness below 2mm can be cut，but gas must be oxygen. Copper and brass should only be cut if the system is equipped with a "reflection and absorption" device, otherwise the reflection will destroy the optical component.

2. Gas Mixture for Welding
Gas shielded welding is a new welding process developed on the basis of the extensive application of manual arc welding and submerged arc welding. Currently it mainly classified into two-component type, Ar-He、Ar-N2、Ar-H2、Ar-O2、 Ar-CO2、CO2-O2、N2-H2; three-component type Ar-He-CO2、Ar-He-N2、 Ar-He-O2、Ar-O2-CO and four-component type, mainly including Ar、He、H2、O2、 N2、CO2. As for detailed concentration, it will depend on welding process, welding material, welding wire model. Generally speaking, the higher the requirement for weld quality, the higher the requirement for the purity of each gas of the mixture. In the European and American countries, purity for Ar、H2、N2 is 99.999％, He 99.996％，CO2 99.99％. impurity H2O shall less than 10mg／m3.

3. High Pressure Gas Mixture
The pressure can achieve 40Mpa. It consists of N2, Ar, H2, Air, CH4. It can be used for research for high pressure reaction.

4. Food Preservation Gas Mixture
A gas mixture used to preserve meat, fruits, vegetables, and grains, has many kinds. Normally it blends CO2, N2 and O2 together. Although CO2 has no bactericidal effect on bacteria, it can inhibit the development of filamentous bacteria (mould) and fungicidal bacteria, N2 acts as an antioxidant and prevents bacteria from developing, O2 oxidizes vitamins and fats. Fresh food, fish and shellfish are active, theyconsums oxygen all the time, if absence of oxygen, the myoglobin of the muscle pigment is reduced to a dark color. That means food cannot keep fresh without oxygen. If mixture gas added with small amount of ethylene oxide, can enhance the killing ability of bacteria.

5. Electric Light Source Gas Mixture
It is mainly used as incandescent lamp, special light source lamp, such as infrared lamp, strong overflow lamp, fluorescent lamp, luminous signal, solar lamp, ozone lamp, photochemical lamp, sterilization lamp, ultraviolet lamp, glow lamp, zirconium arc lamp, halogen gas lamp, etc. and LED filling gas, can be classified into rare gas mixture, halogen compounds mixture, deuterium  mixture and argon mixture. To extend the lamp service life, during production, the raw gas purity shall be not less than 99.99%, and to control strictly on impurity level, normally, water and oxygen shall be less than 2ppm. 

6. Medical and biological research Gas Mixture
Gas mixture for clinical medicine, health and epidemic prevention, medical and biological research and other fields, can be used such as lung function study, clinical blood gas analysis, brain circulation measurement, surgical laser, biological atmosphere and tissue equivalent gas mixture.

7. Disinfection and Sterilization Gas Mixture
Disinfection and sterilization gas mixture is widely used in medical equipment, cosmetics and cultural supplies, as well as packaging and transportation. this kind of mixture gas has the advantages of strong penetration sterilization, economical sterilization equipment, simple operation and no corrosion to metal, etc. The main principle of sterilization is to use alkylation to inert the essential life-sustaining substances in microbiological tissues, mostly like EO mixed with CO2. The work effect is related to the content, temperature, humidity, time and pressure of each component. 

8. Leakage Detection Gas Mixture
All kinds of gas mixture for leakage detection, can be customized.