Selecting the right centrifuge shapes the entire post-processing workflow of any cannabis extraction lab. Two flagship machines from Purge Technologies dominate the planetary centrifuge market: the Spin Tech STP-1500 and the larger Spin Tech STP-3000. Both units replace bulky vacuum oven banks, both purge LPG's in minutes instead of days, and both transform raw extract into finished badder with the press of a button. Yet each model targets a distinct lab profile. This guide breaks down the differences so processors can match equipment to ambition.
Shared Engineering DNA
First, it helps to understand what these machines have in common. Both centrifuges use planetary motion, where the cup rotates on its own axis while orbiting the central drive. This dual-axis spin generates intense shear force, which strips solvents from extract far faster than passive heat. Researchers at the American Chemical Society have documented how mechanical agitation accelerates mass transfer in viscous fluids, and planetary centrifuges leverage exactly that principle.
Additionally, both Spin Tech units pair with a high-performance scroll pump for assisted vacuum. They also accept the same family of accessories, including the Spin Tech cups and inserts collection. Whether a lab runs the smaller or larger model, operators can swap stainless cups, polypropylene cups, and patent-pending mesh filtration inserts without rebuilding their workflow.
The STP-1500: Compact Workhorse
The Spin Tech STP-1500 is the entry point into planetary centrifuge processing, priced at $35,000. This unit suits boutique labs, craft processors, and operations transitioning away from vacuum ovens for the first time. Because the footprint stays small, the STP-1500 fits comfortably in tight C1D1 rooms, which simplifies fire code and electrical planning.
Furthermore, the STP-1500 handles every core task: solvent purging, badder whipping, terpene homogenization, and HTE preparation. Many small labs run a single STP-1500 alongside a butane closed-loop and never need anything more. The machine also shines for R&D, since smaller batches make recipe iteration fast and inexpensive.
The STP-3000: Scaled Production
For high-volume producers, the Spin Tech STP-3000 steps up at $42,000. The larger chamber accepts bigger cups, which means each cycle moves more material through the same workflow steps. Consequently, labs that previously stacked multiple STP-1500 units often consolidate to fewer STP-3000 machines, which simplifies operator training and reduces floor congestion.
Notably, the STP-3000 retains the same intuitive controls as its smaller sibling. Operators trained on one platform transition to the other in minutes. This matters because labor turnover remains a persistent challenge across the cannabis industry, and standardized equipment shortens onboarding considerably.
Decision Framework: Which Model Fits?
Several factors should guide the choice. Initial capital is the obvious one, but it rarely tells the full story. Consider these dimensions instead:
- Lab maturity: New operations often start with the STP-1500 to validate workflows before scaling.
- Batch cadence: Labs running back-to-back extraction cycles benefit from the larger STP-3000 chamber.
- Product mix: R&D-heavy operations love the STP-1500 for rapid recipe testing; production-heavy labs prefer the STP-3000.
- Facility constraints: Tight C1D1 rooms favor the smaller footprint of the STP-1500.
- Compliance posture: Both units help labs meet residual solvent limits set by state regulators and referenced in FDA Q3C residual solvent guidance.
Beyond the Centrifuge
Importantly, both models work best inside a complete post-processing ecosystem. Pair either centrifuge with the SRI 310 FID GC for in-house residual solvent testing, and labs gain real-time SOP feedback without waiting on third-party labs. Add a few stainless steel cups and polypropylene cups to keep multiple recipes in motion simultaneously.
Moreover, sister-site Butane Extraction Equipment stocks the upstream closed-loop systems that feed crude into either centrifuge. For labs planning new construction or expansions, engineering services from C1D1 Labs handle fire protection, permitting, and room layout so the centrifuge fits cleanly into a compliant facility.
The Verdict
Ultimately, neither model is objectively better; each suits a different stage of business. Smaller labs and R&D teams thrive with the STP-1500. High-volume producers and multi-state operators benefit from the larger STP-3000. Some operations even run both, using the STP-1500 for development and the STP-3000 for production. Whichever direction a lab chooses, the planetary centrifuge platform delivers dramatic time savings versus traditional vacuum oven workflows. To discuss specific lab requirements, reach out through the Purge Technologies contact page and the team will help size the right machine for the job.
