Laballiance SFC-24 Supercritical Fluid Pump

Overview

The Laballiance SFC-24 Supercritical Fluid Pump is an engineered solution for precision delivery of supercritical carbon dioxide (scCO₂) and other supercritical solvents in analytical and preparative-scale applications. Designed around Couette-type positive displacement architecture with dual-piston reciprocating motion and active thermal management, the SFC-24 operates on the fundamental principle of maintaining fluid phase stability under high-pressure, near-critical temperature conditions—where viscosity, density, and diffusivity exhibit nonlinear dependence on pressure and temperature. Unlike conventional HPLC pumps, the SFC-24 integrates a fully embedded Peltier thermoelectric cooling system directly into the pump head assembly, eliminating external chillers, refrigerant lines, and associated thermal lag. This solid-state thermal regulation ensures consistent fluid temperature at the point of compression—critical for minimizing phase separation, cavitation, and seal degradation during scCO₂ delivery. The pump’s aluminum pump head enhances conductive heat dissipation, while its all-stainless-steel wetted path (except for the thermally optimized aluminum head) resists corrosion from CO₂-derived carbonic acid and co-solvents such as methanol or ethanol.

Key Features

• Integrated Peltier thermoelectric cooling module—no external chiller, refrigerant, or coolant circulation required
• Aluminum pump head for superior thermal conductivity and mechanical stability across thermal cycles
• Stainless steel fluid path with sapphire-rubied check valves and chemically resistant fluoropolymer seals
• High-fidelity pressure transduction via built-in electronic pressure sensor with real-time feedback loop
• Dual-mode operation: user-selectable constant-flow or constant-pressure control with automatic flow compensation
• Front-panel LED interface with intuitive keypad navigation and status diagnostics
• Comprehensive fault detection—including motor stall, pressure deviation, and thermal overload monitoring
• Integrated outlet particulate filter (0.2 µm) to protect downstream instrumentation and columns
• RS-232 serial interface compliant with SCPI command syntax for integration into automated SFE or SFC workflows

Sample Compatibility & Compliance

The SFC-24 is validated for use with supercritical CO₂, subcritical propane, nitrous oxide, and polar co-solvent blends up to 20% v/v. Its materials of construction comply with USP Class VI biocompatibility standards for elastomeric components and ASTM F2136 for polymer seal performance under cyclic high-pressure exposure. The pump meets IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emissions) requirements for laboratory electromagnetic environments. While not certified for hazardous location use (e.g., ATEX or IECEx), it is routinely deployed in ISO 17025-accredited laboratories performing method development per ASTM D7569 (supercritical fluid extraction of environmental matrices) and USP <621> (chromatographic system suitability for SFC). Its pressure and flow logging capabilities support audit-ready data integrity when paired with 21 CFR Part 11-compliant acquisition software.

Software & Data Management

The SFC-24 supports ASCII-based SCPI commands over RS-232, enabling seamless integration with LabVIEW, Python (pySerial), or MATLAB-based control platforms. Optional firmware upgrades provide time-stamped pressure/flow event logging with CSV export. When connected to a validated chromatography data system (CDS), the pump can feed real-time pressure and flow telemetry into instrument audit trails, satisfying GLP/GMP traceability requirements. Remote analog inputs (0–10 V DC for flow setpoint, 0–10 kHz for pulse-width-modulated flow control) allow synchronization with mass flow controllers or UV detectors in closed-loop SFC systems. All configuration parameters—including upper/lower pressure limits, ramp rates, and auto-purge intervals—are stored in non-volatile memory and survive power cycling.

Applications

• Preparative supercritical fluid chromatography (SFC) for chiral separations and pharmaceutical purification
• Supercritical fluid extraction (SFE) of botanicals, lipids, and environmental contaminants (e.g., PCBs, PAHs)
• Impregnation and particle formation processes (RESS, SAS, PGSS)
• Method development for green chemistry alternatives to organic solvent-intensive protocols
• In-line reaction quenching and extraction coupling in continuous-flow synthesis platforms
• Calibration and validation of high-pressure sensors and flow meters in metrology labs

FAQ

What is the maximum operating temperature range for the SFC-24 pump head?
The integrated Peltier module maintains the pump head between 5 °C and 25 °C under typical scCO₂ flow conditions; ambient operating range is 15–30 °C.
Can the SFC-24 deliver solvents other than CO₂?
Yes—it is compatible with N₂O, propane, dimethyl ether, and CO₂/co-solvent mixtures; compatibility with aggressive solvents (e.g., HF, Cl₂) requires prior consultation with Laballiance engineering.
Is the pressure accuracy specified at static or dynamic conditions?
Pressure accuracy (±2% FS) is verified under steady-state flow at 10–100% of maximum rated pressure, per ISO 5167 calibration traceability.
Does the SFC-24 support gradient elution in SFC applications?
While the pump itself does not generate compositional gradients, it enables precise back-pressure regulation and flow modulation essential for co-solvent gradient programming when used with a separate modifier pump and electronic back-pressure regulator (E-BPR).
How often does the self-cleaning function activate?
The auto-purge cycle initiates automatically after each shutdown sequence and may be manually triggered via front-panel command; duration and frequency are configurable via RS-232.