WELDING SHIELD GASES

Thermco gas mixers are used for mixing 2 and 3 gases for MIG and TIG welding applications. Because Thermco mixers use a surge tank design, the flow rate can be changed from full flow to zero flow while maintaining a correct mixture. No minimum flow is required. Most gas mixers allow the user to adjust the gas mixture, and all larger 2 gas mixers have a built-in gas analyzer.

FOOD PACKAGING

Mixers are available to mix N₂/CO₂ and O₂/CO₂ for food packaging. All these gas mixers contain built-in gas analyzers with alarms to assure that a correct mixture is being created. All wetted parts are cleaned for food service.

FURNACE ATMOSPHERE

Many heat treat processes require a mixture of H₂ and N₂ to create an atmosphere in a furnace. Thermco gas mixers meet the applicable requirement of NFPA 86, "Standard For Industrial Furnaces Using A Special Processing Atmosphere". All Thermco H₂/N₂ gas mixers contain a built-in gas analyzer with appropriate alarms. Thermco has been manufacturing these types of gas mixers since 1969.

LEAK DETECTION

Gas mixers for He/N₂ or He/Air are common for leak detection of parts such as compressors or coils. Some leak detection gas mixers are built for elevated pressures. Thermco has experience building gas mixers with up to 500 PSIG mixed gas pressures.

BLANKETING ATMOSPHERES

Some processes require a mixture of N₂/O₂ or N₂/Air to create a blanketing atmosphere over a chemical. Thermco gas mixers can closely control these mixtures to optimize safety and minimize usage of the more expensive gas component.

OTHER APPLICATIONS

• Airbag Leak Detection
• Molten Mg Blanketing
• Lamp Filling
• Laser Gases
• Plasma Welding

CLICK ON THE REQUIREMENT BELOW TO GO TO THE APPROPRIATE INFORMATION:

2 GAS MIXERS NONFLAMMABLE GAS UP TO 750 SCFH FLOW RATE
FLOW RATE SCFH	MODEL	GAS MIXTURE	TYPICAL APPLICATION
0-350	9775	0-50% He in Ar	Welding Shield Gas
0-750	8500	0-50% CO2 in Ar	Welding Shield Gas
0-750	8505	0-10% O2 in Ar	Welding Shield Gas
0-750	8510	Fixed Ratio, Non O2, Non H2	Welding Shield Gas
0-750	8515	Fixed Ratio with O2, Non H2	Welding Shield Gas
0-750	8525	0-100% CO2 in N2	Food Packaging
0-750	9520	0-100% O2 in CO2	Food Packaging
2 GAS MIXERS NONFLAMMABLE GAS 2000 SCFH AND GREATER
FLOW RATE SCFH	MODEL	GAS MIXTURE	TYPICAL APPLICATION
0-2,000	6105	0-30% CO2 in Ar 0-10% O2 in Ar 0-50% He in Ar 0-50% CO2 in N2 Others Available	Welding, Food Packaging, Indoor
0-2,000	8105	Same as Model 6105	Welding, Food Packaging, Outdoor
0-2,000	8106	0-30% CO2 in Ar 0-10% O2 in Ar 0-50% He in Ar	Welding, Shield Gas, Outdoor, No Analyzer
0-5,000	6205	Same as Model 6105	Welding, Food Packaging, Indoor
0-5,000	8205	Same as Model 6105	Welding, Food Packaging, Outdoor
0-10,000	6305	Same as Model 6105	Welding Shield Gas, Indoor
0-10,000	8305	Same as Model 6105	Welding Shield Gas, Outdoor
0-20,000	6405	Same as Model 6105	Welding Shield Gas, Indoor
0-20,000	8405	Same as Model 6105	Welding Shield Gas, Outdoor
2 GAS MIXERS, FLAMMABLE GAS
FLOW RATE SCFH	MODEL	GAS MIXTURE	TYPICAL APPLICATION
0-500	8520	Fixed Ratio, H2/Ar	Plasma Welding
0-2,000	8300	0-10% H2 in N2 0-20% H2 in N2 0-50% H2 in N2 50-80% H2 in N2	Furnace Atmosphere
0-2,000	8350	0-10% H2 in Ar	Plasma Welding
0-5,000	8400	Same as Model 8300	Furnace Atmosphere
0-5,000	8450	0-10% H2 in Ar	Plasma Welding
0-10,000	8600	Same as Model 8300	Furnace Atmosphere
3 GAS MIXERS
FLOW RATE SCFH	MODEL	GAS MIXTURE	TYPICAL APPLICATION
0-750	8610	Fixed Ratio, Non O2	Welding Shield Gas, Laser Gas
0-750	8615	Fixed Ratio, with O2	Welding Shield Gas
0-2,000	8110	Fixed Ratio, Non O2	Welding Shield Gas, Laser Gas
0-2,000	8115	Fixed Ratio, with O2	Welding Shield Gas
0-5,000	8210	Fixed Ratio, Non O2	Welding Shield Gas
0-5,000	8215	Fixed Ratio, with O2	Welding Shield Gas

---

---