The Great Wall CT-5000L Direct-Cooling Low-Temperature Cold Trap
| Brand | The Great Wall |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | CT-5000L |
| Pricing | Upon Request |
Overview
The Great Wall CT-5000L Direct-Cooling Low-Temperature Cold Trap is an engineered solution for vapor condensation and solvent recovery in vacuum-based laboratory processes. Operating on the principle of direct conductive cooling—where refrigerant circulates through integrated channels in the cold trap’s inner chamber—the CT-5000L achieves stable low-temperature operation without reliance on consumables such as dry ice or liquid nitrogen. Designed for integration with rotary evaporators, vacuum drying ovens, and reduced-pressure concentration systems, it functions as a high-efficiency condensation interface that intercepts water vapor and volatile organic solvents (e.g., methanol, acetone, ethyl acetate, dichloromethane) prior to their ingress into the primary vacuum pump. This significantly reduces pump oil contamination, minimizes vapor backstreaming, and extends service intervals for both oil-sealed and dry vacuum pumps. Its compact footprint and mobile chassis support flexible deployment across analytical, pharmaceutical, and materials science laboratories where space optimization and workflow adaptability are critical.
Key Features
- Direct-cooling architecture with sealed refrigeration circuit—eliminates dependency on cryogenic consumables and ensures continuous, stable operation at target temperatures.
- Cold trap chamber constructed from ASTM A240 06Cr19Ni10 stainless steel (equivalent to AISI 304), providing corrosion resistance against aqueous and common organic media under vacuum and low-temperature conditions.
- Integrated digital temperature display with real-time monitoring of internal chamber temperature—enables precise synchronization with vacuum system activation timing.
- Bottom-mounted drain valve with PTFE-sealed ball mechanism for safe, controlled discharge of condensed liquids after process completion.
- Dual-mode utility: functions not only as a cold trap but also as a pre-freezing bath or low-temperature constant-temperature bath for sample conditioning or reaction control.
- Comprehensive safety protection suite including compressor delay start (to prevent thermal shock), overcurrent cutoff, and overtemperature shutdown via redundant thermal sensors.
- Compact vertical design with four swivel casters featuring locking brakes—facilitates repositioning within fume hoods, glove boxes, or shared instrumentation suites without requiring permanent installation.
Sample Compatibility & Compliance
The CT-5000L is validated for use with water, alcohols, ketones, esters, and halogenated solvents commonly employed in lyophilization, solvent removal, and vacuum distillation workflows. Its 304 stainless steel chamber complies with ISO 8502-3 surface cleanliness requirements for non-reactive contact surfaces in GMP-aligned environments. While not certified to UL/CSA or CE for standalone medical device use, the unit meets IEC 61010-1:2010 safety standards for laboratory electrical equipment. It supports GLP-compliant documentation when paired with external data loggers; however, it does not natively support FDA 21 CFR Part 11 electronic signature or audit trail functionality.
Software & Data Management
The CT-5000L operates as a stand-alone hardware unit with no embedded microcontroller or network interface. Temperature readout is provided via a fixed-resolution LED display (±1 °C accuracy), and all operational parameters are manually controlled using front-panel mechanical switches. No proprietary software, USB connectivity, or remote monitoring capability is included. For laboratories requiring traceable temperature records, integration with third-party calibrated thermocouple data loggers (e.g., Omega OM-DAQPRO-5300 or Testo 176 T4) is recommended and routinely implemented in QC/QA settings following internal SOPs.
Applications
- Vacuum drying of heat-sensitive biomolecules, polymers, and pharmaceutical intermediates in pilot-scale lyophilizers.
- Solvent recovery during rotary evaporation of natural product extracts, enabling cost-effective reuse and reducing hazardous waste generation.
- Protection of turbomolecular and scroll vacuum pumps in mass spectrometry sample introduction systems.
- Pre-freezing of samples prior to freeze-drying—leveraging its stable sub-zero plateau for uniform ice nucleation.
- Low-temperature reaction quenching and cryo-bath stabilization for exothermic Grignard or lithiation reactions.
- Condensation trapping in vacuum manifold systems used for Schlenk-line purging and inert-atmosphere synthesis.
FAQ
Does the CT-5000L require external coolant or cryogens to operate?
No. It uses a hermetically sealed refrigeration system with R404A or R507 refrigerant and requires only standard 220–240 V AC / 50 Hz power input.
What is the typical operating temperature range?
The unit achieves and maintains a stable chamber temperature between –45 °C and –50 °C under standard ambient conditions (25 °C, 50% RH); actual performance may vary slightly depending on ambient load and vacuum duty cycle.
Can it be used with aggressive solvents such as chloroform or THF?
Yes—provided exposure duration is limited and chamber cleaning protocols (e.g., ethanol rinse followed by nitrogen purge) are followed post-use to prevent residual stress corrosion.
Is the drain valve compatible with vacuum-rated tubing connections?
The valve features a standard 1/4″ NPT female thread; users may attach vacuum-compatible silicone or fluoropolymer tubing using appropriate compression fittings.
How often should maintenance be performed?
Annual inspection of refrigerant pressure, condenser coil cleanliness, and electrical insulation resistance is recommended per manufacturer guidelines; no routine oil changes or filter replacements are required.
