Solvent Storage and Auxiliary Equipment: Choosing the Right Chillers, Freezers, and Tanks for Your Extraction Lab
Solvent Storage and Auxiliary Equipment: Choosing the Right Chillers, Freezers, and Tanks for Your Extraction Lab
Your extraction machine gets all the attention. However, the auxiliary equipment surrounding it determines whether your lab runs smoothly or grinds to a halt. Solvent tanks, cryogenic chillers, and ultra-low freezers form the backbone of every high-performing hydrocarbon extraction facility. Without the right supporting gear, even the best closed-loop system will underperform.
In this guide, we break down the three core auxiliary categories and help you match the right equipment to your operation.
ASME Solvent Tanks: The Foundation of Safe, Legal Extraction
Every closed-loop butane or propane system starts and ends at the solvent tank. This vessel stores your solvent under pressure, feeds it into your material columns, and receives recovered gas at the end of each run. As a result, choosing the right tank size and build quality is one of the most important decisions you will make.
All solvent tanks from Butane Extraction Equipment are ASME stamped and rated to 350 PSI at temperatures down to −80°C. They come jacketed for heating or chilling, with 6-inch tri-clamp connections on top and bottom for flexible plumbing. You can choose between dip tube and coil configurations depending on your injection and recovery preferences.
For smaller operations, the ASME 60L Jacketed Solvent Tank ($7,000) provides enough capacity for small-batch runs while keeping startup costs manageable. Mid-scale labs typically step up to the ASME 100L Solvent Tank ($10,000), which pairs well with 10 lb and 20 lb extraction machines. For high-volume production, the 200L ASME Jacketed Solvent Tank ($15,000) and the 300L ASME Jacketed Solvent Tank ($25,000) deliver the capacity needed to keep large systems running without constant refills.
According to the ASME Boiler and Pressure Vessel Code (Section VIII), all pressure vessels used in commercial extraction must meet strict fabrication and testing standards. Using ASME-stamped tanks is not optional in a legal lab — it is a requirement that protects both your team and your license.
Cryogenic Chillers: Controlling Temperature for Quality and Throughput
Temperature control is the single biggest factor in extract quality. Cold solvent pulls fewer fats, lipids, and chlorophyll, which means cleaner product and less post-processing. Additionally, proper chilling on the recovery side condenses solvent vapor efficiently, so your system cycles faster.
Butane Extraction Equipment offers two tiers of cryogenic process chillers, both USA-made and USA-maintained:
- Cryogenic Chiller 2.5 kW at −80°C ($95,520) — Water-cooled and built for years of heavy processing, this unit delivers consistent cryogenic temperatures without flux. It pairs perfectly with your solvent tank and material columns for injection-side chilling.
- Cryogenic Chiller 5.0 kW at −80°C ($127,000) — Designed for labs that need more cooling power at the lowest temperatures. This chiller was built by extractors for extractors who are tired of underpowered imports that fluctuate under load.
On the recovery side, the Recovery Chiller 9 kW at −15°C ($26,720) is an affordable entry point that replaces dry ice for condensing butane or propane back into your solvent tank. For larger systems, the Recovery Chiller 17 kW at −15°C ($38,000) is outdoor-rated and delivers enough power to keep up with high-speed recovery pumps like the Corken T-91 or T-291.
The OSHA Process Safety Management standard (29 CFR 1910.119) emphasizes that temperature control systems in facilities handling flammable materials must be properly maintained and monitored. Investing in reliable, purpose-built chillers is therefore both a safety measure and a production advantage.
Ultra-Low Freezers: Solvent Storage and Winterization
Storing butane and propane at ultra-low temperatures keeps your solvent in a liquid state and ready for immediate use. Furthermore, freezers play a critical role in winterization — the process of chilling crude extract to precipitate fats and waxes before filtration.
The Across International RapidChill series reaches −86°C and comes UL-certified for safe commercial use. These freezers feature vacuum-insulated panels for energy efficiency and dual-compressor designs for rapid cooldown. Options range from the compact Ai RapidChill 12 CF (starting at $9,990) up to the Ai RapidChill 34 CF (starting at $16,990) for labs that need maximum storage capacity.
For facilities that prefer chest-style storage, the Ai Glacier 21 CF −86°C Chest Freezer (starting at $12,990) offers a wide opening for easy loading of solvent containers and sample trays. All models include remote alarm capability and RS485 communication for integration with lab monitoring systems.
One important note: storing flammable solvents in non-explosion-proof freezers requires a stamped fire protection engineering report. C1D1 Labs provides these reports, which outline the steps needed to maintain compliance and shift liability away from your local fire department. This approach can save tens of thousands of dollars compared to purchasing explosion-proof cold storage. Learn more about engineering services at c1d1labs.org.
Matching Auxiliary Equipment to Your System Size
Choosing the right auxiliary gear depends on your extraction machine and production goals. Here is a general framework:
- 10 lb systems: ASME 60L tank, Recovery Chiller 9 kW, RapidChill 12 CF freezer
- 20–30 lb systems: ASME 100L–200L tanks, Cryogenic Chiller 2.5 kW + Recovery Chiller 9 kW, RapidChill 20 CF freezer
- 40 lb systems: ASME 200L–300L tanks, Cryogenic Chiller 5.0 kW + Recovery Chiller 17 kW, RapidChill 34 CF or Glacier 21 CF freezer
Keep in mind that undersized auxiliary equipment creates bottlenecks. A powerful extraction machine paired with a weak chiller will spend more time waiting on recovery than actually processing material. Consequently, investing in properly sized tanks, chillers, and freezers pays for itself through faster cycle times and higher daily output.
Don't Overlook the Supporting Cast
Beyond the big three, several smaller accessories round out a well-equipped lab. Recovery skids ($9,999) increase heat exchange surface area during solvent condensation. NFPA 58 (Liquefied Petroleum Gas Code) provides additional guidance on safe storage and handling of LP-gas that applies directly to extraction facilities using propane or butane blends.
Molecular sieves remove moisture from recovered solvent before it returns to your tank, protecting both your pump and your product quality. Explosion-proof scales let you monitor exactly how much solvent you inject and recover on each run, adding precision to your SOP.
The bottom line is straightforward. Your extraction machine is only as good as the equipment feeding it. Invest in quality ASME tanks, purpose-built cryogenic chillers, and reliable ultra-low freezers — and your lab will reward you with consistent output, cleaner product, and fewer headaches.
Ready to build out your auxiliary setup? Contact Butane Extraction Equipment today and let our team help you match the right tanks, chillers, and freezers to your system.