Contact Us:
219.362.6258
sales@thermco.com
Mailing Address:
Thermco Instrument Corp.
P.O. Box 309
La Porte, In. 46352 USA
Shipping Address:
Thermco Instrument Corp.
1201 West U.S. 20
La Porte, In. 46350 USA
Primary Application: Welding Shield Gas
Spec Sheet | Installation Drawing | C.A.D. Outline Drawing
| Model | 8500 |
| Mixture Range | 0-50% carbon dioxide in argon |
| Mixed Gas Flow Capacity | 0-750 scfh (0-20 Nm3/h) This is the mixed gas capacity at the mid-range setting. The capacity may be more or less depending on the mixture setting. Consult Thermco for more details. |
| Gas Mixing Accuracy | ±1.5% carbon dioxide |
| Ambient and Supply Gas Temperature Range | 32°F to 104°F (0°C to 40°C) |
| Standard Supply Gas Pressure | 100-125 psig (6.9-8.6 barg) Supply pressures do not have to be equal. |
| Standard Mixture Outlet Pressure | 10-50 psig (0.7-3.4 barg) Regulator provided by Thermco in gas mixer for mixture outlet pressure adjustment. Note: Gas mixers are frequently engineered for non-standard pressure conditions. |
| Gas Connections | ½ inch NPT female pipe for argon, carbon dioxide and mixed gas. |
| Surge Tank | 5 gallon, ASME coded and CRN registered, pressure relief valve provided |
| Surge Tank Pressure Switch | Solid-state sensing and output, rated 100,000,000 cycles |
| Power Requirements | 115 VAC, 50/60 Hz, 0.5 amp. Available on request, 220 VAC, 50/60 Hz, 0.25 amps. |
| Weight | 65 lbs. (30 kg) |
| Dimensions | 27.5 in (70 cm) height, 19.1 in (49 cm) width, 10.3 in (26 cm) depth |
| Enclosure | Steel material, with door gasket for protection from dust. The door is provided with a lock. This enclosure is not designed for outdoor installation. |
| Mounting Type | Wall or bench indoors |
The model 8500 is designed to create welding shield gas. This gas mixer is adjustable over the range of 0-50% carbon dioxide in argon.
Because the gas mixer uses a surge tank design, this type of system is ideal for applications that require maintaining a precise proportion from zero flow to full flow with high reliability. The 8500 is suitable for continuous flow or intermittent flow demand.
All Thermco gas mixers use a surge tank. The Thermco surge tank system has the significant advantage of maintaining the accuracy of the gas mixture from zero to full rated flow rate. There is no “minimum” flow rate. Gas mixing systems without a surge tank will have a minimum flow rate below which the gas mixture becomes inaccurate. The Thermco surge tank system is able to accomplish this accuracy without complex control valves or flowmeters.
A pressure alarm system is available to alert personnel in the event of low input gas pressure. When one of the input gas pressures falls too low to create an accurate mixture, a light specific to the low pressure gas is illuminated on the front door, and a horn on the enclosure sounds. The operator can silence the horn with a horn silence button on the inner door.
Gas mixers will be made for supply pressures of 100-125 psig (6.9-8.6 barg) and mixed gas output pressures of 10-50 psig (0.7-3.4 barg) unless ordered otherwise. Gas mixers are often made to special pressure conditions; consult Thermco for details.
Each gas mixer is supplied with one instruction manual which includes wiring and flow diagrams. A data sheet is prepared for each gas mixer specifying major parts of the gas mixer, operating pressure settings and recommended spare parts. Thermco has been providing service on gas mixers since 1964.
Improper use of this product can cause death, serious injury, or property damage. Personnel dealing with this equipment should read and understand warning labels and instruction manuals provided by Thermco. Only personnel familiar with industrial gases should attempt to install or service this equipment. Gases are under pressure and therefore the hazards associated with pressurized systems exist. Gases from high pressure cylinders must be reduced to the specified pressure before entering the gas mixing system to prevent the possibility of equipment damage and personal injury.
Only use oxygen in gas mixers specifically designed for oxygen service. Gas mixers not designed for oxygen service cannot be converted to oxygen service.
Flammable, toxic, liquid or corrosive gases should not enter these gas mixing systems.
Thermco gas mixers are available through many local industrial gas suppliers. Thermco gas mixers may also be ordered directly from the factory. It is especially important to order the correct pressure conditions for the application. If there are questions, please contact the Thermco Sales Engineer.