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CO2 Modular Pump/Vaporizer Skid Unit - Angle View
CO2 Modular Pump/Vaporizer Skid Unit - Side View
CO2 Modular Pump/Vaporizer Skid Unit On-Site
The Gas Buffer Vessel Stations - Angle View
The Gas Buffer Vessel Stations - On-Site



Regardless Of The Scale Of The Solution We Provide, You Can Expect: 

  • Quality manufacturing
  • Performance testing
  • The use of advanced technologies
  • Training and Support 

It’s in our nature to be curious. We truly enjoy investigating, learning, developing, testing and creating solutions for any application involving gas. Our cross-disciplinary team of experts bring an in-depth knowledge of gases to every project. You can count on their passion and commitment to make your project a success. Every Weldcoa System is:

  • 100% Hydrostatically pressure tested to 1.5 times the MAWP
  • 100% Nitrogen leak tested
  • Inspected and thoroughly tested to be the highest safety standards before shipment
  • Inspected again and validated once system is installed and operating
  • Made in the USA


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Our Extractcoa™ Bulk CO2 Gas Supply System is best suited for Extraction Equipment of 40 Liters or Larger. The system can feed into your current extraction equipment, drastically improving the volume and condition of the CO2 supply as well as the efficiency in your operation. 

The Benefits You Will See: 

  • Increase the Flow Rate 
  • Increase in the Extraction Cycles
  • Reduce the Charging Time
  • Reduce Cylinder Handling and Labor 

We meet our customers requirements by determining the best system design using a variety of equipment: 

1. The Bulk Storage Tank or MicroBulk Unit 

Weldcoa does not manufacturer bulk tanks or microbulks however we do have a long history of working with tanks and have close relationships with bulk tank suppliers in the gas industry. We would be happy to connect you with a supplier /contact if needed. 

The components that are needed for this unit, in order to be compatible with our modular skid, are liquid withdrawal and gas/liquid return ports. The tank size will be determined by the extractor size and the number of cycles to be run per day. We can help you will those calculations as well if needed.

2. The CO2 Modular Pump/Vaporizer Skid Unit *

The CO2 Modular Skid Unit consists of a modified CO2 pump, automation controls, vaporizer, piping and valve assemblies, all on a steel skid base. This modular unit is provided, tested, and remotely supported by Weldcoa. Every skid unit is specifically designed to be remotely supported for optimum performance, reliability and safety.

3. The Gas Buffer Vessel Stations *

The Gas Buffer Vessel Stations are modular in design and consists of a four DOT Spec Cylinders with custom heated blankets, automation controls, a touchscreen operator control station , a stainless steel header manifold, piping and valve assemblies, all on a steel skid base. This modular unit is provided, tested, and remotely supported by Weldcoa. 

4. The Extraction machine

Typically, an Extractor consists of a Solvent Chamber(s) ranging from 2 to 400 Liters, an Expansion Chamber(s), an oil collection vessel, a CO2 gas recovery system and automated controls with an operator touchscreen terminal. None of this is provided by Weldcoa.





Bulk CO2 Gas System

CO2 is stored in this unit in a Liquid Phase. 

CO2 product, in a Liquid Phase, is piped from the bulk tank into the Pump (which is on the skid unit) and then piped out of the Pump, in a Liquid Phase, into the Vaporizer (which is also on the skid unit). Once in the Vaporizer, the CO2 product is converted into a Gas Phase and is then piped to the Buffer Vessel Station(s) still in a Gas Phase. 

This process is managed and controlled by Weldcoa’s automation. 

The number of Buffer Vessel Stations needed depends on your volume and quantity of your extraction equipment. This process is managed and controlled by Weldcoa’s automation, holding the CO2 product in Gas Phase at 750 to 900 PSIG. As the client’s extraction volume increases, they can easily accommodate the demand by adding another Buffer Vessel Station to increase their storage capacity. 

From the Buffer Vessel Stations, the CO2 product, still in a Gas Phase, is piped into the Extractor inlet. 

From the inlet, the CO2 product, in Gas Phase is piped into the main Solvent Chambers of the Extraction Machine where the temperature and pressure of the CO2 product is then adjusted, converting the CO2 product from a Gas Phase into a Supercritical Phase. The time it takes to fill up the Solvent Chamber and regulate it to these specific parameters is called the “Charging Time”. 

Once the correct temperature and pressure are achieved, the system pumps the supercritical CO2 in a loop for a specific amount of time. This is called the “Looping Cycle”. As the material passes through the Expansion Chamber the Supercritical CO2 coverts back into a Gas Phase, allowing the oil to decondense and drop into the oil collection vessel, providing a final product/yield from the extraction process. When the entire cycle is complete, the CO2 gas is vented into a recovery system for reuse in the next charging cycle.